From 6daac19dc7953b7df29926cf6bd06c25ae911309 Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Tue, 23 Jan 2024 22:57:31 -0600
Subject: [PATCH 01/11] Add RuntimeManager abstraction to separate asdf from
 Runtime implementations

---
 src/mstrap.cr                       |   2 +
 src/mstrap/cli.cr                   |   2 +-
 src/mstrap/configuration.cr         |   5 ++
 src/mstrap/defs/config_def.cr       |   5 +-
 src/mstrap/errors.cr                |   6 ++
 src/mstrap/project.cr               |  12 +--
 src/mstrap/runtime.cr               |  99 ++++++-------------------
 src/mstrap/runtime_manager.cr       |  49 +++++++++++++
 src/mstrap/runtime_managers/asdf.cr | 110 ++++++++++++++++++++++++++++
 src/mstrap/runtimes/crystal.cr      |   3 +-
 src/mstrap/runtimes/go.cr           |   9 +--
 src/mstrap/runtimes/node.cr         |  11 +--
 src/mstrap/runtimes/php.cr          |   5 +-
 src/mstrap/runtimes/python.cr       |   5 +-
 src/mstrap/runtimes/ruby.cr         |  10 +--
 src/mstrap/runtimes/rust.cr         |   5 +-
 src/mstrap/step.cr                  |   5 ++
 src/mstrap/steps/projects_step.cr   |   2 +-
 src/mstrap/steps/runtimes_step.cr   |   8 +-
 19 files changed, 241 insertions(+), 112 deletions(-)
 create mode 100644 src/mstrap/runtime_manager.cr
 create mode 100644 src/mstrap/runtime_managers/asdf.cr

diff --git a/src/mstrap.cr b/src/mstrap.cr
index 8f8bb1d..2b256e8 100644
--- a/src/mstrap.cr
+++ b/src/mstrap.cr
@@ -26,6 +26,8 @@ require "./mstrap/user"
 require "./mstrap/configuration"
 require "./mstrap/supports/**"
 require "./mstrap/web_bootstrapper"
+require "./mstrap/runtime_manager"
+require "./mstrap/runtime_managers/**"
 require "./mstrap/runtime"
 require "./mstrap/runtimes/**"
 require "./mstrap/project"
diff --git a/src/mstrap/cli.cr b/src/mstrap/cli.cr
index b2ff32c..9756ca9 100644
--- a/src/mstrap/cli.cr
+++ b/src/mstrap/cli.cr
@@ -200,7 +200,7 @@ DESC
             project_def.runtimes = options.string["runtimes"].split(',') if options.string.has_key?("runtimes")
 
             project = MStrap::Project.for(project_def)
-            project.bootstrap
+            project.bootstrap(config.runtime_manager)
           end
         end
 
diff --git a/src/mstrap/configuration.cr b/src/mstrap/configuration.cr
index a93e7a8..fdc22bc 100644
--- a/src/mstrap/configuration.cr
+++ b/src/mstrap/configuration.cr
@@ -7,6 +7,7 @@ module MStrap
     @loaded_profiles : Array(Defs::ProfileDef)
     @known_profile_configs : Array(Defs::ProfileConfigDef)
     @resolved_profile : Defs::ProfileDef
+    @runtime_manager : RuntimeManager
     @user : User
 
     DEFAULT_PROFILE_CONFIG_DEF = Defs::DefaultProfileConfigDef.new
@@ -27,6 +28,9 @@ module MStrap
     # profiles with the default profiles.
     getter :resolved_profile
 
+    # Returns the runtime manager specified by the configuration
+    getter :runtime_manager
+
     # Returns the mstrap user
     getter :user
 
@@ -40,6 +44,7 @@ module MStrap
       @loaded_profiles = [] of Defs::ProfileDef
       @known_profile_configs = config.profiles + [DEFAULT_PROFILE_CONFIG_DEF]
       @resolved_profile = Defs::ProfileDef.new
+      @runtime_manager = RuntimeManager.for(config.runtime_manager)
       @user = User.new(user: config.user)
     end
 
diff --git a/src/mstrap/defs/config_def.cr b/src/mstrap/defs/config_def.cr
index 5411ad1..01cc90c 100644
--- a/src/mstrap/defs/config_def.cr
+++ b/src/mstrap/defs/config_def.cr
@@ -4,11 +4,14 @@ module MStrap
       include HCL::Serializable
 
       @[HCL::Attribute]
-      property version = "1.0"
+      property version = "1.1"
 
       @[HCL::Block(key: "profile")]
       property profiles = [] of ::MStrap::Defs::ProfileConfigDef
 
+      @[HCL::Attribute]
+      property runtime_manager = "asdf"
+
       @[HCL::Block]
       property user = ::MStrap::Defs::UserDef.new
 
diff --git a/src/mstrap/errors.cr b/src/mstrap/errors.cr
index 80d927f..97c463a 100644
--- a/src/mstrap/errors.cr
+++ b/src/mstrap/errors.cr
@@ -32,6 +32,12 @@ module MStrap
     end
   end
 
+  class InvalidRuntimeManagerError < MStrapError
+    def initialize(manager_name)
+      super("Runtime manager is not recognized or supported by mstrap: #{manager_name}")
+    end
+  end
+
   # Exception class to indicate a failure involving language runtime setup
   class RuntimeSetupError < MStrapError
     def initialize(language_name, message)
diff --git a/src/mstrap/project.cr b/src/mstrap/project.cr
index 95ac134..5f11b66 100644
--- a/src/mstrap/project.cr
+++ b/src/mstrap/project.cr
@@ -168,7 +168,7 @@ module MStrap
     # Executes `script/bootstrap` and `script/setup` (if either exists and are
     # configured to run) or executes conventional runtime bootstrapping as
     # determined by mstrap.
-    def bootstrap
+    def bootstrap(runtime_manager : RuntimeManager)
       if has_scripts? && run_scripts?
         logd "Found bootstrapping scripts, executing instead of using defaults."
         begin
@@ -183,7 +183,7 @@ module MStrap
         end
       else
         logd "Bootstrapping '#{name}' with runtime defaults."
-        default_bootstrap
+        default_bootstrap(runtime_manager)
       end
     end
 
@@ -192,12 +192,14 @@ module MStrap
     # This **does not** run any bootstrapping scripts, and is used mainly for
     # calling into conventional bootstrapping within a project's
     # `script/bootstrap` or `script/setup` from `mstrap project`.
-    protected def default_bootstrap
+    #
+    # TODO: Move this somewhere more appropriate
+    protected def default_bootstrap(runtime_manager : RuntimeManager)
       runtime_impls =
         if runtimes.empty?
-          MStrap::Runtime.all
+          runtime_manager.runtimes
         else
-          MStrap::Runtime.all.select do |runtime|
+          runtime_manager.runtimes.select do |runtime|
             runtimes.includes?(runtime.language_name)
           end
         end
diff --git a/src/mstrap/runtime.cr b/src/mstrap/runtime.cr
index 69e58a3..2662808 100644
--- a/src/mstrap/runtime.cr
+++ b/src/mstrap/runtime.cr
@@ -3,11 +3,15 @@ module MStrap
   abstract class Runtime
     include DSL
 
-    @version_env_var : String?
+    getter :runtime_manager
+
+    def initialize(@runtime_manager : RuntimeManager)
+    end
 
     # Execute a command using a specific language runtime version
-    def asdf_exec(command : String, args : Array(String), runtime_version : String? = nil)
+    def runtime_exec(command : String, args : Array(String), runtime_version : String? = nil)
       if runtime_version
+        version_env_var = runtime_manager.version_env_var(language_name)
         env = {version_env_var => runtime_version}
         cmd env, command, args, quiet: true
       else
@@ -15,19 +19,6 @@ module MStrap
       end
     end
 
-    def asdf_install_plugin
-      log "--> Adding #{asdf_plugin_name} to asdf for #{language_name} support: "
-      unless cmd("asdf plugin-add #{asdf_plugin_name}", quiet: true)
-        logc "There was an error adding the #{asdf_plugin_name} to asdf. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
-      end
-      success "OK"
-    end
-
-    # Name of the ASDF plugin. Defaults to language_name
-    def asdf_plugin_name : String
-      language_name
-    end
-
     # Bootstrap the current directory for the runtime
     abstract def bootstrap
 
@@ -36,17 +27,13 @@ module MStrap
     #
     # NOTE: This will not traverse parent directories to find versions files.
     def current_version
-      [
-        version_from_env,
-        version_from_tool_versions,
-        version_from_legacy_version_file,
-      ].find { |version| version }
+      runtime_manager.current_version(language_name)
     end
 
     # Returns whether the ASDF plugin has been installed for a language runtime
     # or not
-    def has_asdf_plugin?
-      `asdf plugin-list`.chomp.split("\n").includes?(asdf_plugin_name)
+    def has_runtime_plugin?
+      runtime_manager.has_plugin?(language_name)
     end
 
     def has_version?(version)
@@ -62,13 +49,7 @@ module MStrap
     # Returns a list of the versions of the language runtime installed
     # by ASDF.
     def installed_versions
-      `asdf list #{asdf_plugin_name} 2>&1`
-        .chomp
-        .split("\n")
-        .map(&.strip.lstrip('*'))
-        .reject do |version|
-          version.blank? || version == "No versions installed"
-        end
+      runtime_manager.installed_versions(language_name)
     end
 
     # Installs global packages for the runtime with an optional version
@@ -82,9 +63,9 @@ module MStrap
     abstract def language_name : String
 
     # Returns the latest version available for the language runtime, according
-    # to the asdf plugin
+    # to the runtime manager
     def latest_version
-      `asdf latest #{asdf_plugin_name}`.chomp
+      runtime_manager.latest_version(language_name)
     end
 
     # Returns whether the project uses the runtime
@@ -93,12 +74,20 @@ module MStrap
     # Installs asdf plugin for the language runtime and installs any of the
     # language runtime dependencies for the project.
     def setup
-      asdf_install_plugin unless has_asdf_plugin?
+      unless runtime_manager.has_plugin?(language_name)
+        log "--> Installing #{language_name} plugin to #{runtime_manager.name}: "
+        unless runtime_manager.install_plugin(language_name)
+          logc "There was an error adding the #{language_name} plugin to #{runtime_manager.name}. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
+        end
+        success "OK"
+      end
 
       with_dir_version(Dir.current) do
+        current_version = self.current_version
+
         if current_version && current_version != "" && !has_version?(current_version)
-          log "--> Installing #{language_name} #{current_version} via asdf-#{asdf_plugin_name}: "
-          unless cmd("asdf install #{asdf_plugin_name} #{current_version}", quiet: true)
+          log "--> Installing #{language_name} #{current_version} via #{runtime_manager.name}: "
+          unless runtime_manager.install_version(language_name, current_version)
             logc "There was an error installing the #{language_name} via asdf. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
           end
           success "OK"
@@ -112,6 +101,7 @@ module MStrap
     #
     # NOTE: This will not traverse parent directories to find versions files.
     def with_dir_version(dir, &)
+      version_env_var = runtime_manager.version_env_var(language_name)
       env_version = ENV[version_env_var]?
       begin
         Dir.cd(dir) do
@@ -123,50 +113,9 @@ module MStrap
       end
     end
 
-    # :nodoc:
-    def version_env_var
-      @version_env_var ||= "ASDF_#{asdf_plugin_name.upcase}_VERSION"
-    end
-
-    # :nodoc:
-    def version_from_env
-      ENV[version_env_var]?
-    end
-
-    # :nodoc:
-    def version_from_tool_versions
-      tool_versions_path = File.join(Dir.current, ".tool-versions")
-      return nil unless File.exists?(tool_versions_path)
-
-      tool_versions = File.read(tool_versions_path).strip
-      if matches = tool_versions.match(/^#{asdf_plugin_name}\s+([^\s]+)$/m)
-        matches[1].strip
-      else
-        nil
-      end
-    end
-
-    # :nodoc:
-    def version_from_legacy_version_file
-      version_path = File.join(Dir.current, ".#{language_name}-version")
-      return nil unless File.exists?(version_path)
-      File.read(version_path).strip
-    end
-
     # :nodoc:
     protected def raise_setup_error!(message)
       raise RuntimeSetupError.new(language_name, message)
     end
-
-    macro finished
-      # :nodoc:
-      def self.all
-        @@runtimes ||= [
-          {% for subclass in @type.subclasses %}
-            {{ subclass.name }}.new,
-          {% end %}
-        ]
-      end
-    end
   end
 end
diff --git a/src/mstrap/runtime_manager.cr b/src/mstrap/runtime_manager.cr
new file mode 100644
index 0000000..43c1c3a
--- /dev/null
+++ b/src/mstrap/runtime_manager.cr
@@ -0,0 +1,49 @@
+module MStrap
+  abstract class RuntimeManager
+    include DSL
+
+    abstract def name : String
+
+    def self.for(runtime_manager_name : String)
+      if manager = all[runtime_manager_name]?
+        manager
+      else
+        raise InvalidRuntimeManagerError.new(runtime_manager_name)
+      end
+    end
+
+    abstract def current_version(language_name : String) : String?
+
+    def has_plugin?(language_name : String) : Bool
+      false
+    end
+
+    abstract def install_plugin(language_name : String) : Bool
+    abstract def install_version(language_name : String, version : String) : Bool
+    abstract def installed_versions(language_name : String) : Array(String)
+    abstract def latest_version(language_name : String) : String
+    abstract def plugin_name(language_name : String) : String?
+    abstract def set_global_version(language_name : String, version : String) : Bool
+    abstract def version_env_var(language_name : String) : String
+
+    macro finished
+      # :nodoc:
+      def self.all
+        @@runtime_managers ||= {
+          {% for subclass in @type.subclasses %}
+            {{subclass.name.stringify.split("::").last.downcase}} => {{ subclass.name }}.new,
+          {% end %}
+        }
+      end
+
+      # :nodoc:
+      def runtimes
+        @runtimes ||= [
+          {% for subclass in Runtime.subclasses %}
+            {{ subclass.name }}.new(self),
+          {% end %}
+        ]
+      end
+    end
+  end
+end
diff --git a/src/mstrap/runtime_managers/asdf.cr b/src/mstrap/runtime_managers/asdf.cr
new file mode 100644
index 0000000..640aeaf
--- /dev/null
+++ b/src/mstrap/runtime_managers/asdf.cr
@@ -0,0 +1,110 @@
+module MStrap
+  module RuntimeManagers
+    class ASDF < RuntimeManager
+      def asdf?
+        true
+      end
+
+      def name : String
+        "asdf"
+      end
+
+      def current_version(language_name : String) : String?
+        [
+          version_from_env(language_name),
+          version_from_tool_versions(language_name),
+          version_from_legacy_version_file(language_name),
+        ].find { |version| version }
+      end
+
+      # Returns whether the ASDF plugin has been installed for a language runtime
+      # or not
+      def has_plugin?(language_name : String) : Bool
+        `asdf plugin-list`.chomp.split("\n").includes?(plugin_name(language_name))
+      end
+
+      def install_plugin(language_name : String) : Bool
+        asdf_plugin_name = plugin_name(language_name)
+
+        if asdf_plugin_name
+          cmd("asdf plugin-add #{asdf_plugin_name}", quiet: true)
+        else
+          logw "Unable to find an ASDF plugin for #{language_name}"
+          false
+        end
+      end
+
+      def install_version(language_name : String, version : String) : Bool
+        cmd("asdf install #{plugin_name(language_name)} #{version}", quiet: true)
+      end
+
+      # Returns a list of the versions of the language runtime installed
+      # by ASDF.
+      def installed_versions(language_name : String) : Array(String)
+        `asdf list #{plugin_name(language_name)} 2>&1`
+          .chomp
+          .split("\n")
+          .map(&.strip.lstrip('*'))
+          .reject do |version|
+            version.blank? || version == "No versions installed"
+          end
+      end
+
+      def latest_version(language_name : String) : String
+        `asdf latest #{plugin_name(language_name)}`.chomp
+      end
+
+      # Name of the ASDF plugin for a particular language
+      def plugin_name(language_name : String) : String?
+        case language_name
+        when "go"
+          "golang"
+        when "node"
+          "nodejs"
+        else
+          language_name
+        end
+      end
+
+      def set_global_version(language_name, version : String) : Bool
+        cmd "asdf global #{plugin_name(language_name)} #{version}", quiet: true
+      end
+
+      # :nodoc:
+      def version_env_var(language_name) : String
+        if asdf_plugin_name = plugin_name(language_name)
+          "ASDF_#{asdf_plugin_name.upcase}_VERSION"
+        else
+          "ASDF_#{language_name.upcase}_VERSION"
+        end
+      end
+
+      # :nodoc:
+      def version_from_env(language_name)
+        env_var_name = version_env_var(language_name)
+        ENV[env_var_name]?
+      end
+
+      # :nodoc:
+      def version_from_tool_versions(language_name)
+        tool_versions_path = File.join(Dir.current, ".tool-versions")
+        return nil unless File.exists?(tool_versions_path)
+
+        tool_versions = File.read(tool_versions_path).strip
+        asdf_plugin_name = plugin_name(language_name)
+        if matches = tool_versions.match(/^#{asdf_plugin_name}\s+([^\s]+)$/m)
+          matches[1].strip
+        else
+          nil
+        end
+      end
+
+      # :nodoc:
+      def version_from_legacy_version_file(language_name)
+        version_path = File.join(Dir.current, ".#{language_name}-version")
+        return nil unless File.exists?(version_path)
+        File.read(version_path).strip
+      end
+    end
+  end
+end
diff --git a/src/mstrap/runtimes/crystal.cr b/src/mstrap/runtimes/crystal.cr
index dc4ca5a..4f3c2ed 100644
--- a/src/mstrap/runtimes/crystal.cr
+++ b/src/mstrap/runtimes/crystal.cr
@@ -1,7 +1,8 @@
 module MStrap
   module Runtimes
     # Crystal runtime management implmentation. It contains methods for interacting
-    # with Crystal via ASDF and bootstrapping a Crystal project based on conventions.
+    # with Crystal via the chosen runtime manager and bootstrapping a Crystal
+    # project based on conventions.
     class Crystal < Runtime
       class SetupError < RuntimeSetupError
         def initialize(message)
diff --git a/src/mstrap/runtimes/go.cr b/src/mstrap/runtimes/go.cr
index 1b6b6d4..719ce9f 100644
--- a/src/mstrap/runtimes/go.cr
+++ b/src/mstrap/runtimes/go.cr
@@ -1,12 +1,9 @@
 module MStrap
   module Runtimes
     # Go runtime management implmentation. It contains methods for interacting
-    # with Go via ASDF and bootstrapping a Go project based on conventions.
+    # with Go via the chosen runtime manager and bootstrapping a Go project
+    # based on conventions.
     class Go < Runtime
-      def asdf_plugin_name : String
-        "golang"
-      end
-
       def language_name : String
         "go"
       end
@@ -28,7 +25,7 @@ module MStrap
           end
 
           disable_go_modules do
-            asdf_exec "go", cmd_args, runtime_version: runtime_version
+            runtime_exec "go", cmd_args, runtime_version: runtime_version
           end
         end
       end
diff --git a/src/mstrap/runtimes/node.cr b/src/mstrap/runtimes/node.cr
index aa97045..3642c72 100644
--- a/src/mstrap/runtimes/node.cr
+++ b/src/mstrap/runtimes/node.cr
@@ -1,12 +1,9 @@
 module MStrap
   module Runtimes
     # Node runtime management implmentation. It contains methods for interacting
-    # with Node via ASDF and bootstrapping a Node project based on conventions.
+    # with Node via the chosen runtime manager and bootstrapping a Node project
+    # based on conventions.
     class Node < Runtime
-      def asdf_plugin_name
-        "nodejs"
-      end
-
       def language_name : String
         "node"
       end
@@ -31,7 +28,7 @@ module MStrap
           end
         end
 
-        skip_reshim { asdf_exec "npm", cmd_args, runtime_version: runtime_version }
+        skip_reshim { runtime_exec "npm", cmd_args, runtime_version: runtime_version }
       end
 
       def matches? : Bool
@@ -49,7 +46,7 @@ module MStrap
         yield
       ensure
         ENV.delete("ASDF_SKIP_RESHIM")
-        asdf_exec "asdf", ["reshim", "nodejs"]
+        runtime_exec "asdf", ["reshim", "nodejs"]
       end
     end
   end
diff --git a/src/mstrap/runtimes/php.cr b/src/mstrap/runtimes/php.cr
index 9f41a81..4e473ef 100644
--- a/src/mstrap/runtimes/php.cr
+++ b/src/mstrap/runtimes/php.cr
@@ -1,7 +1,8 @@
 module MStrap
   module Runtimes
     # PHP runtime management implmentation. It contains methods for interacting
-    # with PHP via ASDF and bootstrapping a PHP project based on conventions.
+    # with PHP via the chosen runtime manager and bootstrapping a PHP project
+    # based on conventions.
     class Php < Runtime
       def language_name : String
         "php"
@@ -25,7 +26,7 @@ module MStrap
           end
         end
 
-        cmd "composer", cmd_args, quiet: true
+        runtime_exec "composer", cmd_args, runtime_version: runtime_version
       end
 
       def matches? : Bool
diff --git a/src/mstrap/runtimes/python.cr b/src/mstrap/runtimes/python.cr
index e1e7170..2cb7e40 100644
--- a/src/mstrap/runtimes/python.cr
+++ b/src/mstrap/runtimes/python.cr
@@ -1,7 +1,8 @@
 module MStrap
   module Runtimes
     # Python runtime management implmentation. It contains methods for interacting
-    # with Python via ASDF and bootstrapping a Python project based on conventions.
+    # with Python via the chosen runtime manager and bootstrapping a Python
+    # project based on conventions.
     #
     # TODO: Does not support virtualenv
     class Python < Runtime
@@ -26,7 +27,7 @@ module MStrap
           end
         end
 
-        asdf_exec "pip", cmd_args, runtime_version: runtime_version
+        runtime_exec "pip", cmd_args, runtime_version: runtime_version
       end
 
       def matches? : Bool
diff --git a/src/mstrap/runtimes/ruby.cr b/src/mstrap/runtimes/ruby.cr
index 9fb4aad..640bc84 100644
--- a/src/mstrap/runtimes/ruby.cr
+++ b/src/mstrap/runtimes/ruby.cr
@@ -1,17 +1,15 @@
 module MStrap
   module Runtimes
     # Ruby runtime management implmentation. It contains methods for interacting
-    # with Ruby via ASDF and bootstrapping a Ruby project based on conventions.
+    # with Ruby via the chosen runtime manager and bootstrapping a Ruby project
+    # based on conventions.
     class Ruby < Runtime
       def language_name : String
         "ruby"
       end
 
       def bootstrap
-        if File.exists?("gems.rb")
-          cmd "gem install bundler", quiet: true
-          cmd "bundle check || bundle install", quiet: true
-        elsif File.exists?("Gemfile")
+        if File.exists?("gems.rb") || File.exists?("Gemfile")
           cmd "gem install bundler", quiet: true
           cmd "bundle check || bundle install", quiet: true
         end
@@ -26,7 +24,7 @@ module MStrap
             cmd_args << version
           end
 
-          asdf_exec "gem", cmd_args, runtime_version: runtime_version
+          runtime_exec "gem", cmd_args, runtime_version: runtime_version
         end
       end
 
diff --git a/src/mstrap/runtimes/rust.cr b/src/mstrap/runtimes/rust.cr
index 33577d9..b981f5a 100644
--- a/src/mstrap/runtimes/rust.cr
+++ b/src/mstrap/runtimes/rust.cr
@@ -1,7 +1,8 @@
 module MStrap
   module Runtimes
     # Rust runtime management implmentation. It contains methods for interacting
-    # with Rust via ASDF and bootstrapping a Rust project based on conventions.
+    # with Rust via the chosen runtime manager and bootstrapping a Rust project
+    # based on conventions.
     class Rust < Runtime
       def language_name : String
         "rust"
@@ -27,7 +28,7 @@ module MStrap
             cmd_args << version
           end
 
-          asdf_exec "cargo", cmd_args, runtime_version: runtime_version
+          runtime_exec "cargo", cmd_args, runtime_version: runtime_version
         end
       end
 
diff --git a/src/mstrap/step.cr b/src/mstrap/step.cr
index f79abab..753c15c 100644
--- a/src/mstrap/step.cr
+++ b/src/mstrap/step.cr
@@ -6,6 +6,7 @@ module MStrap
     @docker : Docker? = nil
     # BUG?: Why aren't these inferred correctly?
     @profile : Defs::ProfileDef
+    @runtime_manager : RuntimeManager
     @user : User
 
     # Extra arguments passed to the step not processed by the main CLI
@@ -20,6 +21,9 @@ module MStrap
     # Resolved profile for mstrap
     getter :profile
 
+    # Language runtime manager for mstrap
+    getter :runtime_manager
+
     # User configured for mstrap
     getter :user
 
@@ -30,6 +34,7 @@ module MStrap
       @config = config
       @options = cli_options
       @profile = config.resolved_profile
+      @runtime_manager = config.runtime_manager
       @user = config.user
     end
 
diff --git a/src/mstrap/steps/projects_step.cr b/src/mstrap/steps/projects_step.cr
index 5ea1553..2611fbc 100644
--- a/src/mstrap/steps/projects_step.cr
+++ b/src/mstrap/steps/projects_step.cr
@@ -38,7 +38,7 @@ module MStrap
           end
 
           logn "--> Bootstrapping: "
-          project.bootstrap
+          project.bootstrap(runtime_manager)
           success "Finished bootstrapping #{project.name}"
         end
 
diff --git a/src/mstrap/steps/runtimes_step.cr b/src/mstrap/steps/runtimes_step.cr
index e2fcee7..a8f53c4 100644
--- a/src/mstrap/steps/runtimes_step.cr
+++ b/src/mstrap/steps/runtimes_step.cr
@@ -10,8 +10,8 @@ module MStrap
       end
 
       def bootstrap
-        MStrap::Runtime.all.each do |runtime|
-          if runtime.has_asdf_plugin? && runtime.has_versions?
+        runtime_manager.runtimes.each do |runtime|
+          if runtime.has_runtime_plugin? && runtime.has_versions?
             logn "==> Setting global #{runtime.language_name} settings"
             set_default_to_latest(runtime)
             packages = runtime_packages(runtime)
@@ -46,8 +46,10 @@ module MStrap
             runtime.installed_versions.last
           end
 
+        return unless latest_version
+
         log "--> Setting default #{runtime.language_name} version to #{latest_version}: "
-        unless cmd "asdf global #{runtime.asdf_plugin_name} #{latest_version}", quiet: true
+        unless runtime_manager.set_global_version(runtime.language_name, latest_version)
           logc "Could not set global #{runtime.language_name} version to #{latest_version}"
         end
         success "OK"

From 3f91ff052c497b9e142544a609be745aa132721b Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Tue, 23 Jan 2024 23:23:39 -0600
Subject: [PATCH 02/11] Add a RuntimeManager for mise

---
 src/mstrap/runtime.cr               |  2 +-
 src/mstrap/runtime_managers/asdf.cr |  4 --
 src/mstrap/runtime_managers/mise.cr | 62 +++++++++++++++++++++++++++++
 src/mstrap/steps/init_step.cr       |  2 +-
 src/mstrap/steps/shell_step.cr      |  7 +++-
 src/mstrap/templates/Brewfile.cr    |  5 +++
 src/mstrap/templates/Brewfile.ecr   |  4 ++
 src/mstrap/templates/env.sh.ecr     | 12 +++++-
 src/mstrap/templates/env_sh.cr      |  6 +++
 9 files changed, 96 insertions(+), 8 deletions(-)
 create mode 100644 src/mstrap/runtime_managers/mise.cr

diff --git a/src/mstrap/runtime.cr b/src/mstrap/runtime.cr
index 2662808..93aa958 100644
--- a/src/mstrap/runtime.cr
+++ b/src/mstrap/runtime.cr
@@ -88,7 +88,7 @@ module MStrap
         if current_version && current_version != "" && !has_version?(current_version)
           log "--> Installing #{language_name} #{current_version} via #{runtime_manager.name}: "
           unless runtime_manager.install_version(language_name, current_version)
-            logc "There was an error installing the #{language_name} via asdf. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
+            logc "There was an error installing #{language_name} #{current_version} via #{runtime_manager.name}. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
           end
           success "OK"
         end
diff --git a/src/mstrap/runtime_managers/asdf.cr b/src/mstrap/runtime_managers/asdf.cr
index 640aeaf..2af6365 100644
--- a/src/mstrap/runtime_managers/asdf.cr
+++ b/src/mstrap/runtime_managers/asdf.cr
@@ -1,10 +1,6 @@
 module MStrap
   module RuntimeManagers
     class ASDF < RuntimeManager
-      def asdf?
-        true
-      end
-
       def name : String
         "asdf"
       end
diff --git a/src/mstrap/runtime_managers/mise.cr b/src/mstrap/runtime_managers/mise.cr
new file mode 100644
index 0000000..6d7a919
--- /dev/null
+++ b/src/mstrap/runtime_managers/mise.cr
@@ -0,0 +1,62 @@
+module MStrap
+  module RuntimeManagers
+    class Mise < RuntimeManager
+      def name : String
+        "mise"
+      end
+
+      def current_version(language_name : String) : String?
+        `mise current #{language_name}`.chomp
+      end
+
+      # Returns whether the mise plugin has been installed for a language runtime
+      # or not
+      def has_plugin?(language_name : String) : Bool
+        `mise plugins ls --core --user`.chomp.split("\n").includes?(plugin_name(language_name))
+      end
+
+      def install_plugin(language_name : String) : Bool
+        cmd("mise plugins install #{plugin_name(language_name)}", quiet: true)
+      end
+
+      def install_version(language_name : String, version : String) : Bool
+        cmd("mise install #{plugin_name(language_name)} #{version}", quiet: true)
+      end
+
+      # Returns a list of the versions of the language runtime installed
+      # by mise.
+      def installed_versions(language_name : String) : Array(String)
+        mise_json_output = `mise ls -i #{plugin_name(language_name)} --json`
+        mise_installed = JSON.parse(mise_json_output)
+
+        if installed = mise_installed.as_a?
+          installed.map { |version| version["version"].as_s }
+        else
+          Array(String).new
+        end
+      end
+
+      def latest_version(language_name : String) : String
+        `mise latest #{plugin_name(language_name)}`.chomp
+      end
+
+      # Name of the mise plugin for a particular language
+      def plugin_name(language_name : String) : String?
+        language_name
+      end
+
+      def set_global_version(language_name, version : String) : Bool
+        cmd "mise use -g #{plugin_name(language_name)}@#{version}", quiet: true
+      end
+
+      # :nodoc:
+      def version_env_var(language_name) : String
+        if mise_plugin_name = plugin_name(language_name)
+          "MISE_#{mise_plugin_name.upcase}_VERSION"
+        else
+          "MISE_#{language_name.upcase}_VERSION"
+        end
+      end
+    end
+  end
+end
diff --git a/src/mstrap/steps/init_step.cr b/src/mstrap/steps/init_step.cr
index 2f50002..5c06043 100644
--- a/src/mstrap/steps/init_step.cr
+++ b/src/mstrap/steps/init_step.cr
@@ -69,7 +69,7 @@ module MStrap
         if !File.exists?(Paths::BREWFILE) || force?
           logw "No Brewfile found or update requested with --force"
           log "--> Copying default Brewfile to #{Paths::BREWFILE}: "
-          brewfile_contents = Templates::Brewfile.new.to_s
+          brewfile_contents = Templates::Brewfile.new(runtime_manager).to_s
           File.write(Paths::BREWFILE, brewfile_contents)
           success "OK"
         end
diff --git a/src/mstrap/steps/shell_step.cr b/src/mstrap/steps/shell_step.cr
index a11d963..5d4da89 100644
--- a/src/mstrap/steps/shell_step.cr
+++ b/src/mstrap/steps/shell_step.cr
@@ -26,6 +26,7 @@ module MStrap
       MSG
 
       @login_shell : String? = nil
+      @shell_name : String? = nil
 
       def self.bootstrap(options)
         new(options).bootstrap
@@ -46,7 +47,7 @@ module MStrap
       def bootstrap
         Dir.mkdir_p(MStrap::Paths::RC_DIR)
 
-        contents = Templates::EnvSh.new.to_s
+        contents = Templates::EnvSh.new(shell_name, runtime_manager).to_s
         File.write(env_sh_path, contents, perm: 0o600)
 
         exit_if_shell_changed!
@@ -92,6 +93,10 @@ module MStrap
         end
       end
 
+      private def shell_name
+        @shell_name ||= login_shell.split("/").last
+      end
+
       private def shell_supported?
         !shell_file_name.nil?
       end
diff --git a/src/mstrap/templates/Brewfile.cr b/src/mstrap/templates/Brewfile.cr
index 37f1e1a..4e21e67 100644
--- a/src/mstrap/templates/Brewfile.cr
+++ b/src/mstrap/templates/Brewfile.cr
@@ -3,6 +3,11 @@ module MStrap
   module Templates
     class Brewfile
       ECR.def_to_s "#{__DIR__}/Brewfile.ecr"
+
+      getter :runtime_manager
+
+      def initialize(@runtime_manager : RuntimeManager)
+      end
     end
   end
 end
diff --git a/src/mstrap/templates/Brewfile.ecr b/src/mstrap/templates/Brewfile.ecr
index 1f11ada..ee883f0 100644
--- a/src/mstrap/templates/Brewfile.ecr
+++ b/src/mstrap/templates/Brewfile.ecr
@@ -9,7 +9,11 @@ brew 'pkg-config'
 brew 'zlib'
 
 # Language runtime managers
+<% if runtime_manager.name == "asdf" %>
 brew 'asdf'
+<% elsif runtime_manager.name == "mise" %>
+brew 'mise'
+<% end %>
 
 if /darwin/ =~ RUBY_PLATFORM
   brew 'autoconf'
diff --git a/src/mstrap/templates/env.sh.ecr b/src/mstrap/templates/env.sh.ecr
index 1e8e4c4..89faf3c 100644
--- a/src/mstrap/templates/env.sh.ecr
+++ b/src/mstrap/templates/env.sh.ecr
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env <%= shell_name %>
 
 export MSTRAP=true
 export MSTRAP_PROJECT_SOCKETS="<%= MStrap::Paths::PROJECT_SOCKETS %>"
@@ -6,9 +6,12 @@ export MSTRAP_SRC_DIR="<%= MStrap::Paths::SRC_DIR %>"
 export MSTRAP_RC_DIR="<%= MStrap::Paths::RC_DIR %>"
 
 <%- if needs_homebrew_shellenv? %>
+# Load Homebrew
 test -d <%= MStrap::Paths::HOMEBREW_PREFIX %> && eval $(<%= MStrap::Paths::HOMEBREW_PREFIX %>/bin/brew shellenv)
 <% end -%>
 
+<% if runtime_manager.name == "asdf" %>
+# Activate asdf for language runtime version management
 if [ -d "$(brew --prefix asdf)" ]; then
   source "$(brew --prefix asdf)/libexec/asdf.sh"
 
@@ -16,3 +19,10 @@ if [ -d "$(brew --prefix asdf)" ]; then
     echo "legacy_version_file = yes\n" > "$HOME/.asdfrc"
   fi
 fi
+<% elsif runtime_manager.name == "mise" %>
+# Activate mise for language runtime version management
+if command -v mise 2>&1 > /dev/null; then
+  export MISE_ASDF_COMPAT=1
+  eval "$(mise activate <%= shell_name %>)"
+fi
+<% end %>
diff --git a/src/mstrap/templates/env_sh.cr b/src/mstrap/templates/env_sh.cr
index a47fae4..158b16e 100644
--- a/src/mstrap/templates/env_sh.cr
+++ b/src/mstrap/templates/env_sh.cr
@@ -4,6 +4,12 @@ module MStrap
     class EnvSh
       ECR.def_to_s "#{__DIR__}/env.sh.ecr"
 
+      getter :shell_name
+      getter :runtime_manager
+
+      def initialize(@shell_name : String, @runtime_manager : RuntimeManager)
+      end
+
       def needs_homebrew_shellenv?
         {{ flag?(:linux) || (flag?(:aarch64) && flag?(:darwin)) }}
       end

From 73755230d4410f40a1dfb2b4d394ce747075399f Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 18:13:50 -0600
Subject: [PATCH 03/11] Run runtime commands via runtime_exec

This is functionally the same as cmd for now in these cases, but might not always be
---
 src/mstrap/runtime.cr          | 2 +-
 src/mstrap/runtimes/crystal.cr | 2 +-
 src/mstrap/runtimes/node.cr    | 6 +++---
 src/mstrap/runtimes/php.cr     | 2 +-
 src/mstrap/runtimes/python.cr  | 2 +-
 src/mstrap/runtimes/rust.cr    | 2 +-
 6 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/mstrap/runtime.cr b/src/mstrap/runtime.cr
index 93aa958..6071a81 100644
--- a/src/mstrap/runtime.cr
+++ b/src/mstrap/runtime.cr
@@ -9,7 +9,7 @@ module MStrap
     end
 
     # Execute a command using a specific language runtime version
-    def runtime_exec(command : String, args : Array(String), runtime_version : String? = nil)
+    def runtime_exec(command : String, args : Array(String)? = nil, runtime_version : String? = nil)
       if runtime_version
         version_env_var = runtime_manager.version_env_var(language_name)
         env = {version_env_var => runtime_version}
diff --git a/src/mstrap/runtimes/crystal.cr b/src/mstrap/runtimes/crystal.cr
index 4f3c2ed..4e77a33 100644
--- a/src/mstrap/runtimes/crystal.cr
+++ b/src/mstrap/runtimes/crystal.cr
@@ -21,7 +21,7 @@ module MStrap
 
       def bootstrap
         if File.exists?("shard.lock")
-          cmd "shards check || shards install", quiet: true
+          runtime_exec "shards check || shards install"
         end
       end
 
diff --git a/src/mstrap/runtimes/node.cr b/src/mstrap/runtimes/node.cr
index 3642c72..dbaa1e2 100644
--- a/src/mstrap/runtimes/node.cr
+++ b/src/mstrap/runtimes/node.cr
@@ -10,10 +10,10 @@ module MStrap
 
       def bootstrap
         if File.exists?("yarn.lock")
-          cmd "brew install yarn", quiet: true
-          skip_reshim { cmd "yarn install", quiet: true }
+          cmd "brew install yarn", quiet: true &&
+            skip_reshim { runtime_exec "yarn install" }
         elsif File.exists?("package.json")
-          skip_reshim { cmd "npm install", quiet: true }
+          skip_reshim { runtime_exec "npm install" }
         end
       end
 
diff --git a/src/mstrap/runtimes/php.cr b/src/mstrap/runtimes/php.cr
index 4e473ef..3da82bd 100644
--- a/src/mstrap/runtimes/php.cr
+++ b/src/mstrap/runtimes/php.cr
@@ -11,7 +11,7 @@ module MStrap
       def bootstrap
         if File.exists?("composer.json")
           cmd "brew install composer", quiet: true
-          cmd "composer install", quiet: true
+          runtime_exec "composer install"
         end
       end
 
diff --git a/src/mstrap/runtimes/python.cr b/src/mstrap/runtimes/python.cr
index 2cb7e40..04456e3 100644
--- a/src/mstrap/runtimes/python.cr
+++ b/src/mstrap/runtimes/python.cr
@@ -12,7 +12,7 @@ module MStrap
 
       def bootstrap
         if File.exists?("requirements.txt")
-          cmd "pip install -r requirements.txt", quiet: true
+          runtime_exec "pip install -r requirements.txt"
         end
       end
 
diff --git a/src/mstrap/runtimes/rust.cr b/src/mstrap/runtimes/rust.cr
index b981f5a..ba749ae 100644
--- a/src/mstrap/runtimes/rust.cr
+++ b/src/mstrap/runtimes/rust.cr
@@ -15,7 +15,7 @@ module MStrap
 
       def bootstrap
         if File.exists?("Cargo.toml")
-          cmd "cargo fetch", quiet: true
+          runtime_exec "cargo fetch"
         end
       end
 

From a523d6c74da11349c6472d7eaafc17634bee256c Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 18:14:41 -0600
Subject: [PATCH 04/11] rust: fallback to latest version rather than "stable"

stable is specific to a particular asdf rust plugin
---
 src/mstrap/runtimes/rust.cr | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mstrap/runtimes/rust.cr b/src/mstrap/runtimes/rust.cr
index ba749ae..306f515 100644
--- a/src/mstrap/runtimes/rust.cr
+++ b/src/mstrap/runtimes/rust.cr
@@ -9,8 +9,8 @@ module MStrap
       end
 
       def current_version
-        # Falling back to stable is probably fairly safe
-        super || "stable"
+        # Falling back to latest is _usually_ safe
+        super || latest_version
       end
 
       def bootstrap

From a4e15605acb7887e98ae11c0ecc97a279e7c84b7 Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 18:15:46 -0600
Subject: [PATCH 05/11] go: use go install for binary package installation on
 Go 1.16+

---
 src/mstrap/runtimes/go.cr | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/mstrap/runtimes/go.cr b/src/mstrap/runtimes/go.cr
index 719ce9f..f88c809 100644
--- a/src/mstrap/runtimes/go.cr
+++ b/src/mstrap/runtimes/go.cr
@@ -4,19 +4,26 @@ module MStrap
     # with Go via the chosen runtime manager and bootstrapping a Go project
     # based on conventions.
     class Go < Runtime
+      # :nodoc:
+      GO_INSTALL_MIN_VERSION = SemanticVersion.new(1, 16, 0)
+
       def language_name : String
         "go"
       end
 
       def bootstrap
         if File.exists?("go.mod")
-          cmd "go mod download", quiet: true
+          runtime_exec "go mod download"
         end
       end
 
       def install_packages(packages : Array(Defs::PkgDef), runtime_version : String? = nil) : Bool
         packages.all? do |pkg|
-          cmd_args = ["get", "-u"]
+          cmd_args = if SemanticVersion.parse(runtime_version) >= GO_INSTALL_MIN_VERSION
+            ["install"]
+          else
+            ["get", "-u"]
+          end
 
           if version = pkg.version
             cmd_args << "#{pkg.name}@#{version}"

From 09c398db575b3a41754e01c0d4d6da397179de7d Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 18:15:59 -0600
Subject: [PATCH 06/11] Skip asdf reshim on mise

---
 src/mstrap/runtimes/node.cr | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mstrap/runtimes/node.cr b/src/mstrap/runtimes/node.cr
index dbaa1e2..220c645 100644
--- a/src/mstrap/runtimes/node.cr
+++ b/src/mstrap/runtimes/node.cr
@@ -46,7 +46,7 @@ module MStrap
         yield
       ensure
         ENV.delete("ASDF_SKIP_RESHIM")
-        runtime_exec "asdf", ["reshim", "nodejs"]
+        runtime_exec "asdf", ["reshim", "nodejs"] if runtime_manager.name == "asdf"
       end
     end
   end

From d15944fcf5184e08d6fce12e71f274374f991a96 Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 18:17:03 -0600
Subject: [PATCH 07/11] ruby: Skip bundler install

All supported rubies ship with bundler at this point, and those that don't probably don't build on modern systems via asdf or mise at this point
---
 src/mstrap/runtime_managers/mise.cr |  2 +-
 src/mstrap/runtimes/go.cr           | 11 ++++++-----
 src/mstrap/runtimes/node.cr         |  3 +--
 src/mstrap/runtimes/ruby.cr         |  3 +--
 4 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/mstrap/runtime_managers/mise.cr b/src/mstrap/runtime_managers/mise.cr
index 6d7a919..49fe5fb 100644
--- a/src/mstrap/runtime_managers/mise.cr
+++ b/src/mstrap/runtime_managers/mise.cr
@@ -30,7 +30,7 @@ module MStrap
         mise_installed = JSON.parse(mise_json_output)
 
         if installed = mise_installed.as_a?
-          installed.map { |version| version["version"].as_s }
+          installed.map(&.["version"].as_s)
         else
           Array(String).new
         end
diff --git a/src/mstrap/runtimes/go.cr b/src/mstrap/runtimes/go.cr
index f88c809..144278a 100644
--- a/src/mstrap/runtimes/go.cr
+++ b/src/mstrap/runtimes/go.cr
@@ -19,11 +19,12 @@ module MStrap
 
       def install_packages(packages : Array(Defs::PkgDef), runtime_version : String? = nil) : Bool
         packages.all? do |pkg|
-          cmd_args = if SemanticVersion.parse(runtime_version) >= GO_INSTALL_MIN_VERSION
-            ["install"]
-          else
-            ["get", "-u"]
-          end
+          cmd_args =
+            if SemanticVersion.parse(runtime_version) >= GO_INSTALL_MIN_VERSION
+              ["install"]
+            else
+              ["get", "-u"]
+            end
 
           if version = pkg.version
             cmd_args << "#{pkg.name}@#{version}"
diff --git a/src/mstrap/runtimes/node.cr b/src/mstrap/runtimes/node.cr
index 220c645..5f0c3db 100644
--- a/src/mstrap/runtimes/node.cr
+++ b/src/mstrap/runtimes/node.cr
@@ -10,8 +10,7 @@ module MStrap
 
       def bootstrap
         if File.exists?("yarn.lock")
-          cmd "brew install yarn", quiet: true &&
-            skip_reshim { runtime_exec "yarn install" }
+          cmd "brew install yarn", quiet: true && skip_reshim { runtime_exec "yarn install" }
         elsif File.exists?("package.json")
           skip_reshim { runtime_exec "npm install" }
         end
diff --git a/src/mstrap/runtimes/ruby.cr b/src/mstrap/runtimes/ruby.cr
index 640bc84..7b8c72e 100644
--- a/src/mstrap/runtimes/ruby.cr
+++ b/src/mstrap/runtimes/ruby.cr
@@ -10,8 +10,7 @@ module MStrap
 
       def bootstrap
         if File.exists?("gems.rb") || File.exists?("Gemfile")
-          cmd "gem install bundler", quiet: true
-          cmd "bundle check || bundle install", quiet: true
+          runtime_exec "bundle check || bundle install"
         end
       end
 

From 0bbb8822c94b64efd230d5476458aa47740eddca Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 20:41:26 -0600
Subject: [PATCH 08/11] Abstract away language runtime execution via runtime
 manager

---
 src/mstrap/runtime.cr               | 19 +++++++----------
 src/mstrap/runtime_manager.cr       |  4 ++--
 src/mstrap/runtime_managers/asdf.cr | 29 ++++++++++++++++++-------
 src/mstrap/runtime_managers/mise.cr | 33 ++++++++++++++++++++---------
 4 files changed, 54 insertions(+), 31 deletions(-)

diff --git a/src/mstrap/runtime.cr b/src/mstrap/runtime.cr
index 6071a81..938d040 100644
--- a/src/mstrap/runtime.cr
+++ b/src/mstrap/runtime.cr
@@ -10,13 +10,7 @@ module MStrap
 
     # Execute a command using a specific language runtime version
     def runtime_exec(command : String, args : Array(String)? = nil, runtime_version : String? = nil)
-      if runtime_version
-        version_env_var = runtime_manager.version_env_var(language_name)
-        env = {version_env_var => runtime_version}
-        cmd env, command, args, quiet: true
-      else
-        cmd command, args, quiet: true
-      end
+      runtime_manager.runtime_exec(language_name, command, args, runtime_version)
     end
 
     # Bootstrap the current directory for the runtime
@@ -101,15 +95,18 @@ module MStrap
     #
     # NOTE: This will not traverse parent directories to find versions files.
     def with_dir_version(dir, &)
-      version_env_var = runtime_manager.version_env_var(language_name)
-      env_version = ENV[version_env_var]?
+      org_version = current_version
       begin
         Dir.cd(dir) do
-          ENV[version_env_var] = current_version
+          unless runtime_manager.set_version(language_name, current_version)
+            raise_setup_error!("Unable to switch version to #{current_version}")
+          end
           yield
         end
       ensure
-        ENV[version_env_var] = env_version
+        unless runtime_manager.set_version(language_name, org_version)
+          raise_setup_error!("Unable to set version back to #{current_version}")
+        end
       end
     end
 
diff --git a/src/mstrap/runtime_manager.cr b/src/mstrap/runtime_manager.cr
index 43c1c3a..4924673 100644
--- a/src/mstrap/runtime_manager.cr
+++ b/src/mstrap/runtime_manager.cr
@@ -22,9 +22,9 @@ module MStrap
     abstract def install_version(language_name : String, version : String) : Bool
     abstract def installed_versions(language_name : String) : Array(String)
     abstract def latest_version(language_name : String) : String
-    abstract def plugin_name(language_name : String) : String?
+    abstract def runtime_exec(language_name : String, command : String, args : Array(String)? = nil, runtime_version : String? = nil)
+    abstract def set_version(language_name : String, version : String?) : Bool
     abstract def set_global_version(language_name : String, version : String) : Bool
-    abstract def version_env_var(language_name : String) : String
 
     macro finished
       # :nodoc:
diff --git a/src/mstrap/runtime_managers/asdf.cr b/src/mstrap/runtime_managers/asdf.cr
index 2af6365..3675904 100644
--- a/src/mstrap/runtime_managers/asdf.cr
+++ b/src/mstrap/runtime_managers/asdf.cr
@@ -62,12 +62,28 @@ module MStrap
         end
       end
 
+      # Execute a command using a specific language runtime version
+      def runtime_exec(language_name : String, command : String, args : Array(String)? = nil, runtime_version : String? = nil)
+        if runtime_version
+          version_env_var = version_env_var(language_name)
+          env = {version_env_var => runtime_version}
+          cmd env, command, args, quiet: true
+        else
+          cmd command, args, quiet: true
+        end
+      end
+
+      def set_version(language_name : String, version : String?) : Bool
+        version_env_var = version_env_var(language_name)
+        ENV[version_env_var] = version
+        true
+      end
+
       def set_global_version(language_name, version : String) : Bool
         cmd "asdf global #{plugin_name(language_name)} #{version}", quiet: true
       end
 
-      # :nodoc:
-      def version_env_var(language_name) : String
+      private def version_env_var(language_name) : String
         if asdf_plugin_name = plugin_name(language_name)
           "ASDF_#{asdf_plugin_name.upcase}_VERSION"
         else
@@ -75,14 +91,12 @@ module MStrap
         end
       end
 
-      # :nodoc:
-      def version_from_env(language_name)
+      private def version_from_env(language_name)
         env_var_name = version_env_var(language_name)
         ENV[env_var_name]?
       end
 
-      # :nodoc:
-      def version_from_tool_versions(language_name)
+      private def version_from_tool_versions(language_name)
         tool_versions_path = File.join(Dir.current, ".tool-versions")
         return nil unless File.exists?(tool_versions_path)
 
@@ -95,8 +109,7 @@ module MStrap
         end
       end
 
-      # :nodoc:
-      def version_from_legacy_version_file(language_name)
+      private def version_from_legacy_version_file(language_name)
         version_path = File.join(Dir.current, ".#{language_name}-version")
         return nil unless File.exists?(version_path)
         File.read(version_path).strip
diff --git a/src/mstrap/runtime_managers/mise.cr b/src/mstrap/runtime_managers/mise.cr
index 49fe5fb..fe2c2b0 100644
--- a/src/mstrap/runtime_managers/mise.cr
+++ b/src/mstrap/runtime_managers/mise.cr
@@ -6,7 +6,25 @@ module MStrap
       end
 
       def current_version(language_name : String) : String?
-        `mise current #{language_name}`.chomp
+        `mise current #{plugin_name(language_name)}`.chomp
+      end
+
+      # Execute a command using a specific language runtime version
+      def runtime_exec(language_name : String, command : String, args : Array(String)? = nil, runtime_version : String? = nil)
+        exec_args = [] of String
+
+        if runtime_version
+          exec_args << "#{plugin_name(language_name)}@#{runtime_version}"
+        end
+
+        cmd_args = ["exec"] + exec_args + ["--", command]
+        cmd_args += args unless !args
+
+        if command && (!args || args.empty?)
+          cmd "mise #{cmd_args.join(' ')}", quiet: true
+        else
+          cmd "mise", cmd_args, quiet: true
+        end
       end
 
       # Returns whether the mise plugin has been installed for a language runtime
@@ -45,17 +63,12 @@ module MStrap
         language_name
       end
 
-      def set_global_version(language_name, version : String) : Bool
-        cmd "mise use -g #{plugin_name(language_name)}@#{version}", quiet: true
+      def set_version(language_name : String, version : String?) : Bool
+        true
       end
 
-      # :nodoc:
-      def version_env_var(language_name) : String
-        if mise_plugin_name = plugin_name(language_name)
-          "MISE_#{mise_plugin_name.upcase}_VERSION"
-        else
-          "MISE_#{language_name.upcase}_VERSION"
-        end
+      def set_global_version(language_name, version : String) : Bool
+        cmd "mise use -g #{plugin_name(language_name)}@#{version}", quiet: true
       end
     end
   end

From 25d0c236ec6854addd893bba1c76643684f3d6be Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 21:11:09 -0600
Subject: [PATCH 09/11] Cleanup some runtime setup error handling

---
 src/mstrap/cli.cr              | 2 ++
 src/mstrap/runtime.cr          | 8 ++++----
 src/mstrap/runtimes/crystal.cr | 6 ------
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/src/mstrap/cli.cr b/src/mstrap/cli.cr
index 9756ca9..7430e13 100644
--- a/src/mstrap/cli.cr
+++ b/src/mstrap/cli.cr
@@ -235,6 +235,8 @@ DESC
       Signal::TERM.trap { exit 1 }
 
       Commander.run(cli, options.argv)
+    rescue e : MStrapError
+      logc e.message
     rescue e
       {% if flag?(:debug) %}
         raise e
diff --git a/src/mstrap/runtime.cr b/src/mstrap/runtime.cr
index 938d040..596286b 100644
--- a/src/mstrap/runtime.cr
+++ b/src/mstrap/runtime.cr
@@ -65,13 +65,13 @@ module MStrap
     # Returns whether the project uses the runtime
     abstract def matches? : Bool
 
-    # Installs asdf plugin for the language runtime and installs any of the
-    # language runtime dependencies for the project.
+    # Installs runtime manager plugin for the language runtime and installs any
+    # of the language runtime dependencies for the project.
     def setup
       unless runtime_manager.has_plugin?(language_name)
         log "--> Installing #{language_name} plugin to #{runtime_manager.name}: "
         unless runtime_manager.install_plugin(language_name)
-          logc "There was an error adding the #{language_name} plugin to #{runtime_manager.name}. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
+          raise_setup_error!("There was an unexpected error adding the #{language_name} plugin to #{runtime_manager.name}")
         end
         success "OK"
       end
@@ -82,7 +82,7 @@ module MStrap
         if current_version && current_version != "" && !has_version?(current_version)
           log "--> Installing #{language_name} #{current_version} via #{runtime_manager.name}: "
           unless runtime_manager.install_version(language_name, current_version)
-            logc "There was an error installing #{language_name} #{current_version} via #{runtime_manager.name}. Check #{MStrap::Paths::LOG_FILE} or run again with --debug"
+            raise_setup_error!("There was an unexpected error installing #{current_version} via #{runtime_manager.name}")
           end
           success "OK"
         end
diff --git a/src/mstrap/runtimes/crystal.cr b/src/mstrap/runtimes/crystal.cr
index 4e77a33..6099610 100644
--- a/src/mstrap/runtimes/crystal.cr
+++ b/src/mstrap/runtimes/crystal.cr
@@ -4,12 +4,6 @@ module MStrap
     # with Crystal via the chosen runtime manager and bootstrapping a Crystal
     # project based on conventions.
     class Crystal < Runtime
-      class SetupError < RuntimeSetupError
-        def initialize(message)
-          super("crystal", message)
-        end
-      end
-
       def language_name : String
         "crystal"
       end

From 2b8571a3a32d9885314e0c288c424be7ffc5c502 Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 22:14:13 -0600
Subject: [PATCH 10/11] Create runtimes config section for default_manager

---
 spec/mstrap/configuration_spec.cr      | 42 +++++++++++++++++++++++++-
 src/mstrap/configuration.cr            |  2 +-
 src/mstrap/defs/config_def.cr          | 12 +++++---
 src/mstrap/defs/runtimes_config_def.cr | 15 +++++++++
 src/mstrap/runtime_managers/mise.cr    |  2 +-
 5 files changed, 66 insertions(+), 7 deletions(-)
 create mode 100644 src/mstrap/defs/runtimes_config_def.cr

diff --git a/spec/mstrap/configuration_spec.cr b/spec/mstrap/configuration_spec.cr
index 2bebec7..58b2f09 100644
--- a/spec/mstrap/configuration_spec.cr
+++ b/spec/mstrap/configuration_spec.cr
@@ -34,7 +34,7 @@ def delete_profile(name)
 end
 
 Spectator.describe MStrap::Configuration do
-  let(config_def) do
+  let(config_def_v1_0) do
     MStrap::Defs::ConfigDef.from_hcl(<<-HCL)
       version = "1.0"
 
@@ -50,6 +50,8 @@ Spectator.describe MStrap::Configuration do
     HCL
   end
 
+  let(config_def) { config_def_v1_0 }
+
   let(personal_profile_def) do
     MStrap::Defs::ProfileDef.from_hcl(<<-HCL)
       version = "1.0"
@@ -315,6 +317,44 @@ Spectator.describe MStrap::Configuration do
     end
   end
 
+  describe "#runtime_manager" do
+    context "for v1.0 configs" do
+      subject { MStrap::Configuration.new(config_def_v1_0) }
+
+      it "defaults to asdf" do
+        expect(subject.runtime_manager).to be_a(MStrap::RuntimeManagers::ASDF)
+      end
+    end
+
+    context "for v1.1 configs" do
+      let(config_def_v1_1) do
+        MStrap::Defs::ConfigDef.from_hcl(<<-HCL)
+          version = "1.1"
+
+          runtimes {
+            default_manager = "mise"
+          }
+
+          user {
+            name = "Reginald Testington"
+            email = "reginald@testington.biz"
+          }
+
+          profile "personal" {
+            url = "ssh://git@gitprovider.biz/reggiemctest/mstrap-personal.git"
+          }
+
+        HCL
+      end
+
+      subject { MStrap::Configuration.new(config_def_v1_1) }
+
+      it "can be set through runtimes.default_manager" do
+        expect(subject.runtime_manager).to be_a(MStrap::RuntimeManagers::Mise)
+      end
+    end
+  end
+
   describe "#save!" do
     it "saves the loaded configuration back to disk" do
       subject = MStrap::Configuration.new(config_def)
diff --git a/src/mstrap/configuration.cr b/src/mstrap/configuration.cr
index fdc22bc..b5e276b 100644
--- a/src/mstrap/configuration.cr
+++ b/src/mstrap/configuration.cr
@@ -44,7 +44,7 @@ module MStrap
       @loaded_profiles = [] of Defs::ProfileDef
       @known_profile_configs = config.profiles + [DEFAULT_PROFILE_CONFIG_DEF]
       @resolved_profile = Defs::ProfileDef.new
-      @runtime_manager = RuntimeManager.for(config.runtime_manager)
+      @runtime_manager = RuntimeManager.for(config.runtimes.default_manager)
       @user = User.new(user: config.user)
     end
 
diff --git a/src/mstrap/defs/config_def.cr b/src/mstrap/defs/config_def.cr
index 01cc90c..e473808 100644
--- a/src/mstrap/defs/config_def.cr
+++ b/src/mstrap/defs/config_def.cr
@@ -9,13 +9,13 @@ module MStrap
       @[HCL::Block(key: "profile")]
       property profiles = [] of ::MStrap::Defs::ProfileConfigDef
 
-      @[HCL::Attribute]
-      property runtime_manager = "asdf"
+      @[HCL::Block]
+      property runtimes = ::MStrap::Defs::RuntimesConfigDef.new
 
       @[HCL::Block]
       property user = ::MStrap::Defs::UserDef.new
 
-      def_equals_and_hash @version, @profiles, @user
+      def_equals_and_hash @version, @profiles, @runtimes, @user
 
       def self.from_url(url : String)
         HTTP::Client.get(url, tls: MStrap.tls_client) do |response|
@@ -23,7 +23,11 @@ module MStrap
         end
       end
 
-      def initialize(@user = UserDef.new, @profiles = Array(ProfileConfigDef).new)
+      def initialize(
+        @user = UserDef.new,
+        @profiles = Array(ProfileConfigDef).new,
+        @runtimes = RuntimesConfigDef.new
+      )
       end
     end
   end
diff --git a/src/mstrap/defs/runtimes_config_def.cr b/src/mstrap/defs/runtimes_config_def.cr
new file mode 100644
index 0000000..0df0c6e
--- /dev/null
+++ b/src/mstrap/defs/runtimes_config_def.cr
@@ -0,0 +1,15 @@
+module MStrap
+  module Defs
+    class RuntimesConfigDef
+      include HCL::Serializable
+
+      @[HCL::Attribute]
+      property default_manager = "asdf"
+
+      def_equals_and_hash @default_manager
+
+      def initialize
+      end
+    end
+  end
+end
diff --git a/src/mstrap/runtime_managers/mise.cr b/src/mstrap/runtime_managers/mise.cr
index fe2c2b0..a94f5f2 100644
--- a/src/mstrap/runtime_managers/mise.cr
+++ b/src/mstrap/runtime_managers/mise.cr
@@ -18,7 +18,7 @@ module MStrap
         end
 
         cmd_args = ["exec"] + exec_args + ["--", command]
-        cmd_args += args unless !args
+        cmd_args += args if args
 
         if command && (!args || args.empty?)
           cmd "mise #{cmd_args.join(' ')}", quiet: true

From f66c11c548c846deb9215c836bed111d50ec58d5 Mon Sep 17 00:00:00 2001
From: Max Fierke <max@maxfierke.com>
Date: Sat, 27 Jan 2024 23:39:27 -0600
Subject: [PATCH 11/11] Start the 0.7.0 cycle w/ 0.7.0.dev

---
 CHANGELOG.md | 15 +++++++++++++++
 meson.build  |  2 +-
 shard.yml    |  2 +-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7297b69..2e488d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Support for using [mise](https://mise.jdx.dev) to manage language runtime versions (#50). `config.hcl` can be configured as such to enable it:
+  ```
+  version = "1.1"
+
+  # ...
+
+  runtimes {
+    default_manager = "mise"
+  }
+  ```
+
+  To switch, you'll need to re-run `mstrap` and restart your terminal windows.
+  Then, you can run `brew uninstall asdf --force` to uninstall asdf (`mstrap`
+  will have removed `asdf`'s activation from mstrap's `env.sh` already)
+
 ### Changed
 
 ### Bugfixes
diff --git a/meson.build b/meson.build
index 3e204a6..e4a7556 100644
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@ project('mstrap',
   'c',
   meson_version : '>= 0.60.0',
   license : 'MIT',
-  version : '0.6.0',
+  version : '0.7.0.dev',
   default_options : [
     'buildtype=debugoptimized',
     'default_library=static'
diff --git a/shard.yml b/shard.yml
index fe591da..343b8c2 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: mstrap
-version: 0.6.0
+version: 0.7.0.dev
 
 authors:
   - Max Fierke <max@maxfierke.com>