rename --os-system to --platform and add some more explanation/exampl…

…es (#15)
juhp · Aug 22, 2023 · 2154b0f · 2154b0f
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diff --git a/README.md b/README.md
@@ -48,6 +48,11 @@ the projects in subdirs under the current directory or
 all matching `.stack-work` dirs from the current directory and below
 respectively.
 
+Note is you have different ghc variants/archs installed
+you may need to use the `--platform` to choose which one to query/clean:
+examples include 'x86_64-linux-tinfo6', 'x86_64-linux', 'aarch64-linux-nix',
+'x86_64-osx', 'aarch64-osx', etc.
+
 ### Example usage
 List a project's builds:
 ```ShellSession

diff --git a/src/Main.hs b/src/Main.hs
@@ -91,8 +91,8 @@ main = do
     keepOption = optionalWith auto 'k' "keep" "INT"
                  "number of project builds per ghc version [default 5]" 5
 
-    systemOpt = strOptionWith 'o' "os-system" "SYSTEM"
-                "Specify which of the OS platforms to work on (eg 'x86_64-linux-tinfo6' or 'aarch64-linux-nix', etc)"
+    systemOpt = strOptionWith 'o' "platform" "SYSTEM"
+                "Specify which OS platform to work on (eg 'x86_64-linux-tinfo6', 'aarch64-linux-nix', 'x86_64-osx', 'aarch64-osx',  etc)"
 
 withRecursion :: Bool -> Maybe Recursion -> IO () -> IO ()
 withRecursion needinstall mrecursion =