Add support for justfiles (#1175)

* Add support for justfiles

* Fix test file for justfile

* Use Just as language name instead of Justfile

* Add Just to README

README.md

@@ -445,6 +445,7 @@ Json
 Jsx
 Julia
 Julius
+Just
 KakouneScript
 Kotlin
 Lean

languages.json

@@ -874,6 +874,13 @@
       "name": "Jupyter Notebooks",
       "extensions": ["ipynb"]
     },
+    "Just": {
+      "shebangs": ["#!/usr/bin/env just --justfile"],
+      "env": ["just"],
+      "line_comment": ["#"],
+      "extensions": ["just"],
+      "filenames": ["justfile"]
+    },
     "K": {
       "name": "K",
       "nested": true,

tests/data/justfile

@@ -0,0 +1,215 @@
+# 215 lines 154 code 11 comments 50 blanks
+set shell := ["sh", "-c"]
+set windows-shell := ["powershell.exe", "-NoLogo", "-Command"]
+set allow-duplicate-recipes
+set positional-arguments
+set dotenv-load
+set export
+
+alias s := serve
+
+bt := '0'
+
+export RUST_BACKTRACE_1 := bt
+
+log := "warn"
+
+export JUST_LOG := (log + "ing" + `grep loop /etc/networks | cut -f2`)
+
+tmpdir  := `mktemp`
+version := "0.2.7"
+tardir  := tmpdir / "awesomesauce-" + version
+foo1    := / "tmp"
+foo2_3  := "a/"
+tarball := tardir + ".tar.gz"
+
+export RUST_BACKTRACE_2 := "1"
+string-with-tab             := "\t"
+string-with-newline         := "\n"
+string-with-carriage-return := "\r"
+string-with-double-quote    := "\""
+string-with-slash           := "\\"
+string-with-no-newline      := "\
+"
+
+# Newlines in variables
+single := '
+hello
+'
+
+double := "
+goodbye
+"
+escapes := '\t\n\r\"\\'
+
+# this string will evaluate to `foo\nbar\n`
+x := '''
+  foo
+  bar
+'''
+
+# this string will evaluate to `abc\n  wuv\nbar\n`
+y := """
+  abc
+    wuv
+  xyz
+"""
+
+for:
+  for file in `ls .`; do \
+    echo $file; \
+  done
+
+serve:
+  touch {{tmpdir}}/file
+
+# This backtick evaluates the command `echo foo\necho bar\n`, which produces the value `foo\nbar\n`.
+stuff := ```
+    echo foo
+    echo bar
+  ```
+
+
+an_arch := trim(lowercase(justfile())) + arch()
+trim_end := trim_end("99.99954%   ")
+home_dir := replace(env_var('HOME') / "yep", 'yep', '')
+quoted := quote("some things beyond\"$()^%#@!|-+=_*&'`")
+smartphone := trim_end_match('blah.txt', 'txt')
+museum := trim_start_match(trim_start(trim_end_matches('   yep_blah.txt.txt', '.txt')), 'yep_')
+water := trim_start_matches('ssssssoup.txt', 's')
+congress := uppercase(os())
+fam := os_family()
+path_1 := absolute_path('test')
+path_2 := '/tmp/subcommittee.txt'
+ext_z := extension(path_2)
+exe_name := file_name(just_executable())
+a_stem := file_stem(path_2)
+a_parent := parent_directory(path_2)
+sans_ext := without_extension(path_2)
+camera := join('tmp', 'dir1', 'dir2', path_2)
+cleaned := clean('/tmp/blah/..///thing.txt')
+id__path := '/tmp' / sha256('blah') / sha256_file(justfile())
+_another_var := env_var_or_default("HOME", justfile_directory())
+python := `which python`
+
+exists := if path_exists(just_executable()) =~ '^/User' { uuid() } else { 'yeah' }
+
+foo   := if env_var("_") == "/usr/bin/env" { `touch /tmp/a_file` } else { "dummy-value" }
+foo_b := if "hello" == "goodbye" { "xyz" } else { if "no" == "no" { "yep"} else { error("123") } }
+foo_c := if "hello" == "goodbye" {
+  "xyz"
+} else if "a" == "a" {
+  "abc"
+} else {
+  "123"
+}
+
+bar:
+  @echo {{foo}}
+
+
+bar2 foo_stuff:
+  echo {{ if foo_stuff == "bar" { "hello" } else { "goodbye" } }}
+
+executable:
+  @echo The executable is at: {{just_executable()}}
+
+
+rustfmt:
+  find {{invocation_directory()}} -name \*.rs -exec rustfmt {} \;
+
+test:
+  echo "{{home_dir}}"
+
+
+linewise:
+  Write-Host "Hello, world!"
+
+serve2:
+  @echo "Starting server with database $DATABASE_ADDRESS on port $SERVER_PORT…"
+
+
+shebang := if os() == 'windows' {
+  'powershell.exe'
+} else {
+  '/usr/bin/env pwsh'
+}
+
+shebang:
+	#!{{shebang}}
+	$PSV = $PSVersionTable.PSVersion | % {"$_" -split "\." }
+	$psver = $PSV[0] + "." + $PSV[1]
+	if ($PSV[2].Length -lt 4) {
+		$psver += "." + $PSV[2] + " Core"
+	} else {
+		$psver += " Desktop"
+	}
+	echo "PowerShell $psver"
+
+@foo:
+  echo bar
+
+@test5 *args='':
+  bash -c 'while (( "$#" )); do echo - $1; shift; done' -- "$@"
+
+test2 $RUST_BACKTRACE="1":
+  # will print a stack trace if it crashes
+  cargo test
+
+
+notify m="":
+	keybase chat send --topic-type "chat" --channel <channel> <team> "upd(<repo>): {{m}}"
+
+# Sample project script 2
+script2 *ARGS:
+    {{ python }} script2.py {{ ARGS }}
+
+braces:
+  echo 'I {{{{LOVE}} curly braces!'
+
+_braces2:
+  echo '{{'I {{LOVE}} curly braces!'}}'
+
+_braces3:
+  echo 'I {{ "{{" }}LOVE}} curly braces!'
+
+foo2:
+  -@cat foo
+  echo 'Done!'
+
+test3 target tests=path_1:
+  @echo 'Testing {{target}}:{{tests}}…'
+  ./test --tests {{tests}} {{target}}
+
+test4 triple=(an_arch + "-unknown-unknown") input=(an_arch / "input.dat"):
+  ./test {{triple}}
+
+variadic $VAR1_1 VAR2 VAR3 VAR4=("a") +$FLAGS='-q': foo2 braces
+  cargo test {{FLAGS}}
+
+time:
+  @-date +"%H:%S"
+  -cat /tmp/nonexistent_file.txt
+  @echo "finished"
+
+justwords:
+  grep just \
+    --text /usr/share/dict/words \
+    > /tmp/justwords
+
+# Subsequent dependencies
+# https://just.systems/man/en/chapter_37.html
+# To test, run `$ just -f test-suite.just b`
+a:
+  echo 'A!'
+
+b: a && d
+  echo 'B start!'
+  just -f {{justfile()}} c
+  echo 'B end!'
+
+c:
+  echo 'C!'
+
+d:
+  echo 'D!'