Support pre-commit hooks

Fix #2343

Author: Freed-Wu

.pre-commit-hooks.yaml

@@ -0,0 +1,11 @@
+---
+- id: lua-language-server-check
+  name: lua language server check
+  description: >
+    linter for lua
+  entry: lua-language-server
+  language: lua
+  types:
+    - lua
+  args:
+    - --check

script/cli/check.lua

@@ -69,8 +69,9 @@ for i = 1, numThreads do
     end
 end
 
+local checkPassed = true
 for _, process in ipairs(procs) do
-    process:wait()
+    checkPassed = process:wait() == 0 and checkPassed
 end
 
 local outpath = CHECK_OUT_PATH
@@ -99,3 +100,4 @@ if numThreads > 1 then
         print(lang.script('CLI_CHECK_RESULTS', count, outpath))
     end
 end
+return checkPassed

script/cli/init.lua

@@ -4,13 +4,13 @@ if _G['VERSION'] then
 end
 
 if _G['CHECK'] then
-    require 'cli.check'
-    os.exit(0, true)
+    local checkPassed = require 'cli.check'
+    os.exit(checkPassed and 0 or 1, true)
 end
 
 if _G['CHECK_WORKER'] then
-    require 'cli.check_worker'
-    os.exit(0, true)
+    local checkPassed = require 'cli.check_worker'
+    os.exit(checkPassed and 0 or 1, true)
 end
 
 if _G['DOC_UPDATE'] then