Add basic Kconfig support for lima-guestagent

Make it possible to configure which guestagents to build.

Regenerating config file requires kconfig or kbuild tools.

Signed-off-by: Anders F Björklund <[email protected]>

.gitignore

@@ -1,3 +1,4 @@
 _output/
 _artifacts/
 lima.REJECTED.yaml
+.config

Kconfig

@@ -0,0 +1,32 @@
+
+mainmenu "Lima"
+
+config GUESTAGENT_OS_LINUX
+ bool "guestagent OS: Linux"
+ help
+ Build lima-guestagent for "Linux" OS
+ default y
+
+config GUESTAGENT_ARCH_X8664
+ bool "guestagent Arch: x86_64"
+ help
+ Build lima-guestagent for "x86_64" Arch
+ default y
+
+config GUESTAGENT_ARCH_AARCH64
+ bool "guestagent Arch: aarch64"
+ help
+ Build lima-guestagent for "aarch64" Arch
+ default y
+
+config GUESTAGENT_ARCH_ARMV7L
+ bool "guestagent Arch: armv7l"
+ help
+ Build lima-guestagent for "armv7l" Arch
+ default y
+
+config GUESTAGENT_ARCH_RISCV64
+ bool "guestagent Arch: riscv64"
+ help
+ Build lima-guestagent for "riscv64" Arch
+ default y

Makefile

@@ -7,6 +7,10 @@ TAR ?= tar
 ZIP ?= zip
 PLANTUML ?= plantuml # may also be "java -jar plantuml.jar" if installed elsewhere
 
+# The KCONFIG programs are only needed for re-generating the ".config" file.
+KCONFIG_CONF ?= kconfig-conf
+KCONFIG_MCONF ?= kconfig-mconf
+
 GOOS ?= $(shell $(GO) env GOOS)
 ifeq ($(GOOS),windows)
 bat = .bat
@@ -45,6 +49,11 @@ GO_BUILD := $(GO) build -ldflags="-s -w -X $(PACKAGE)/pkg/version.Version=$(VERS
 .PHONY: all
 all: binaries manpages
 
+.PHONY: help
+help:
+ @echo ' binaries - Build all binaries'
+ @echo ' manpages - Build manual pages'
+
 exe: _output/bin/limactl$(exe)
 
 .PHONY: minimal
@@ -55,21 +64,44 @@ minimal: clean \
  mkdir -p _output/share/lima/templates
  cp -aL examples/default.yaml _output/share/lima/templates/
 
+config: Kconfig
+ $(KCONFIG_CONF) $<
+
+menuconfig: Kconfig
+ $(KCONFIG_MCONF) $<
+
+# Copy the default config, if not overridden locally
+# This is done to avoid a dependency on KCONFIG tools
+.config: config.mk
+ cp $^ $@
+
+-include .config
+
 HELPERS = \
  _output/bin/nerdctl.lima \
  _output/bin/apptainer.lima \
  _output/bin/docker.lima \
  _output/bin/podman.lima \
  _output/bin/kubectl.lima
 
+ifeq ($(CONFIG_GUESTAGENT_OS_LINUX),y)
+ifeq ($(CONFIG_GUESTAGENT_ARCH_X8664),y)
 GUESTAGENT += \
  _output/share/lima/lima-guestagent.Linux-x86_64
+endif
+ifeq ($(CONFIG_GUESTAGENT_ARCH_AARCH64),y)
 GUESTAGENT += \
  _output/share/lima/lima-guestagent.Linux-aarch64
+endif
+ifeq ($(CONFIG_GUESTAGENT_ARCH_ARMV7L),y)
 GUESTAGENT += \
  _output/share/lima/lima-guestagent.Linux-armv7l
+endif
+ifeq ($(CONFIG_GUESTAGENT_ARCH_RISCV64),y)
 GUESTAGENT += \
  _output/share/lima/lima-guestagent.Linux-riscv64
+endif
+endif
 
 .PHONY: binaries
 binaries: clean \

README.md

@@ -129,9 +129,17 @@ curl -fsSL "https://github.com/lima-vm/lima/releases/download/${VERSION}/lima-${
 
 - To install Lima from the source, run `make && make install`.
 
+- To change the build configuration, run `make config` or `make menuconfig`.
+ This requires kconfig tools installed, it is also possible to edit `.config`.
+
 > **NOTE**
 > Lima is not regularly tested on ARM Mac (due to lack of CI).
 
+##### Kconfig tools
+
+The tools are available as either "kconfig-frontends" or "kbuild-standalone".
+There is one `conf` for the text, and one `mconf` for the menu interface.
+
 </p>
 </details>
 

config.mk

@@ -0,0 +1,5 @@
+CONFIG_GUESTAGENT_OS_LINUX=y
+CONFIG_GUESTAGENT_ARCH_X8664=y
+CONFIG_GUESTAGENT_ARCH_AARCH64=y
+CONFIG_GUESTAGENT_ARCH_ARMV7L=y
+CONFIG_GUESTAGENT_ARCH_RISCV64=y