From 1d3a48f6270a1b1027ac75a275ec9dbb547699eb Mon Sep 17 00:00:00 2001
From: daanx <daan@effp.org>
Date: Sat, 30 Dec 2023 06:19:16 -0800
Subject: [PATCH] add platform warning if binary install is not available

---
 src/Syntax/Lexer.x                               | 16 ++++++++--------
 .../vscode/koka.language-koka/src/workspace.ts   | 16 ++++++++++++----
 2 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/src/Syntax/Lexer.x b/src/Syntax/Lexer.x
index 38d2bfdf6..a313525b6 100644
--- a/src/Syntax/Lexer.x
+++ b/src/Syntax/Lexer.x
@@ -69,7 +69,7 @@ $charesc      = [nrt\\\'\"]    -- "
 @utf8unsafe   = \xE2 \x80 [\x8E-\x8F\xAA-\xAE]
               | \xE2 \x81 [\xA6-\xA9]
 
-@utf8         = @utf8valid          
+@utf8         = @utf8valid
 
 @linechar     = [$graphic$space$tab]|@utf8
 @commentchar  = ([$graphic$space$tab] # [\/\*])|@newline|@utf8
@@ -182,10 +182,10 @@ program :-
 
 <stringraw> @utf8unsafe   { string $ unsafeChar "raw string" }
 <stringraw> @stringraw    { more id }
-<stringraw> \"\#*         { withRawDelim $ \s delim -> 
+<stringraw> \"\#*         { withRawDelim $ \s delim ->
                               if (s == delim)
                                 then -- done
-                                     pop $ \_ -> less (length delim) $ withmore $ 
+                                     pop $ \_ -> less (length delim) $ withmore $
                                                    string (LexString . reverse . drop (length delim) . reverse)
                               else if (length s > length delim)
                                 then -- too many terminating hashse
@@ -267,7 +267,7 @@ startsWith [] _  = False
 startsWith (c:cs) (p:ps) = if (p==c) then startsWith cs ps else False
 
 unsafeChar :: String -> String -> Lex
-unsafeChar kind s 
+unsafeChar kind s
   = LexError ("unsafe character in " ++ kind ++ ": \\u" ++ showHex 4 (fromEnum (head s)))
 
 -----------------------------------------------------------
@@ -302,7 +302,7 @@ reservedNames
     , "effect", "receffect"
     , "named"
     , "mask"
-    , "override"   
+    , "override"
 
     -- deprecated
     , "private", "public"  -- use pub
@@ -415,7 +415,7 @@ data State = State { pos      :: !Pos    -- current position
                    , previous :: !Char
                    , current  :: !BString
                    , previousLex :: Lex
-                   , rawEnd   :: String  
+                   , rawEnd   :: String
                    }
 
 type Action = BString -> State -> State -> (Maybe Lex, State)
@@ -464,10 +464,10 @@ withmore action
 
 
 rawdelim :: Action -> Action
-rawdelim action 
+rawdelim action
   = \bs st0 st1 -> let s = bstringToString bs
                        delim = "\"" ++ replicate (length s - 2) '#'
-                   in -- trace ("raw delim: " ++ show delim) $ 
+                   in -- trace ("raw delim: " ++ show delim) $
                       action bs st0 st1{ rawEnd = delim }
 
 withRawDelim :: (String -> String -> Action) -> Action
diff --git a/support/vscode/koka.language-koka/src/workspace.ts b/support/vscode/koka.language-koka/src/workspace.ts
index 3f21775e1..d0006405c 100644
--- a/support/vscode/koka.language-koka/src/workspace.ts
+++ b/support/vscode/koka.language-koka/src/workspace.ts
@@ -15,9 +15,10 @@ import * as semver from "semver"
 
 
 // Constants
-const home          = os.homedir();
-const kokaExeName   = (os.platform() === "win32" ? "koka.exe" : "koka")
-const defaultShell  = (os.platform() === "win32" ? "C:\\Windows\\System32\\cmd.exe" : null)
+const home            = os.homedir();
+const kokaExeName     = (os.platform() === "win32" ? "koka.exe" : "koka")
+const defaultShell    = (os.platform() === "win32" ? "C:\\Windows\\System32\\cmd.exe" : null)
+const binaryPlatforms = ["win32-x64","darwin-arm64","darwin-x64","linux-x64"]
 
 // Development: set kokaDevDir to a non-empty string to (un)install from a local bundle instead of github
 const kokaDevDir    = ""
@@ -243,9 +244,16 @@ async function installKoka(context: vscode.ExtensionContext, config: vscode.Work
     }
   }
 
+  // check platform
+  let warning = ""
+  const platform = `${os.platform()}-${os.arch()}`
+  if (!binaryPlatforms.includes(platform)) {
+    warning = `Unfortunately, it looks like your platform ${platform} does not have a binary installer -- see <https://github.com/koka-lang/koka> for build instructions.  `
+  }
+
   // ask the user to install
   const decision = await vscode.window.showInformationMessage(
-    `${(reason ? reason + ".  \n" : "")}Would you like to download and install the latest Koka compiler?`,
+    `${(reason ? reason + ".  \n" : "")}${warning}Would you like to download and install the latest Koka compiler?`,
     { }, // modal: true },
     'Yes',
     'No'