[ new ] Command line option for printing version info

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## v0.2.7.0.1.5 - 2024-12-18
+
+### Added
+- New command line option `--version` and `-V` for printing version information.
+
 ## v0.2.7.0.1.4 - 2024-12-6
 
 ### Changed

app/Main.hs

@@ -32,7 +32,10 @@ main = do
   options <- getOptionsFromArgv
   if optHelp options
     then putStrLn usageMessage
-    else do
-      _ <- run options
-      -- _ <- run
-      return ()
+    else
+      if optVersion options
+        then putStrLn versionString
+        else do
+          _ <- run options
+          -- _ <- run
+          return ()

package.yaml

@@ -1,5 +1,5 @@
 name:                agda-language-server
-version:             0.2.7.0.1.4
+version:             0.2.7.0.1.5
 github:              "banacorn/agda-language-server"
 license:             MIT
 author:              "Ting-Gian LUA"

src/Options.hs

@@ -4,6 +4,7 @@
 module Options
   ( Options (..),
     getOptionsFromArgv,
+    versionString,
     usageMessage,
     Config (..),
     initConfig,
@@ -37,12 +38,13 @@ usageMessage = usageInfo usage options ++ usageAboutAgdaOptions
 data Options = Options
   { optViaTCP :: Maybe Int,
     optRawAgdaOptions :: [String],
-    optHelp :: Bool
+    optHelp :: Bool,
+    optVersion :: Bool
   }
 
 defaultOptions :: Options
 defaultOptions =
-  Options {optViaTCP = Nothing, optRawAgdaOptions = [], optHelp = False}
+  Options {optViaTCP = Nothing, optRawAgdaOptions = [], optHelp = False, optVersion = False}
 
 options :: [OptDescr (Options -> Options)]
 options =
@@ -61,21 +63,32 @@ options =
           )
           "PORT"
       )
-      "talk with the editor via TCP port (4096 as default)"
+      "talk with the editor via TCP port (4096 as default)",
+    Option
+      ['V']
+      ["version"]
+      (NoArg (\opts -> opts {optVersion = True}))
+      "print version information and exit"
   ]
 
-usage :: String
-usage = 
+versionNumber :: Int
+versionNumber = 5
+
+versionString :: String
+versionString =
 #if MIN_VERSION_Agda(2,7,0)
-  "Agda v2.7.0.1 Language Server v4\nUsage: als [Options...]\n"
+  "Agda v2.7.0.1 Language Server v" <> show versionNumber
 #elif MIN_VERSION_Agda(2,6,4)
-  "Agda v2.6.4.3 Language Server v4\nUsage: als [Options...]\n"
+  "Agda v2.6.4.3 Language Server v" <> show versionNumber
 #elif MIN_VERSION_Agda(2,6,3)
-  "Agda v2.6.3 Language Server v4\nUsage: als [Options...]\n"
+  "Agda v2.6.3 Language Server v" <> show versionNumber
 #else
-  "Unsupported Agda version\n"
+  error "Unsupported Agda version"
 #endif
 
+usage :: String
+usage = versionString <> "\nUsage: als [Options...]\n"
+
 usageAboutAgdaOptions :: String
 usageAboutAgdaOptions = "\n  +AGDA [Options for Agda ...] -AGDA\n    To pass command line options to Agda, put them in between '+AGDA' and '-AGDA'\n    For example:\n      als -p=3000 +AGDA --cubical -AGDA\n    If you are using agda-mode on VS Code, put them in the Settings at:\n      agdaMode.connection.commandLineOptions\n"