1 files changed, 41 insertions, 0 deletions
diff --git a/hadrian/build-cabal.bat b/hadrian/build-cabal.bat
new file mode 100644
index 0000000000..aa0acab4e4
--- /dev/null
+++ b/hadrian/build-cabal.bat
@@ -0,0 +1,41 @@
+@echo off
+set CABAL=cabal
+set CABFLAGS=--disable-documentation --disable-profiling --disable-library-profiling
+
+rem It is currently more robust to pass Cabal an absolute path to the project file.
+set PROJ="%CD%/hadrian/cabal.project"
+
+if not exist %PROJ% (
+    echo Current working directory must be GHC's top-level folder
+    exit /B 2
+)
+
+"%CABAL%" 2> NUL
+if not %ERRORLEVEL% equ 1 (
+    echo Please make sure 'cabal' is in your PATH
+    exit /B 2
+)
+
+for /F "tokens=*" %%a in ('%CABAL% --numeric-version') do set CABVERSTR=%%a
+for /F "delims=. tokens=1,2,3,4" %%a in ("%CABVERSTR%") do (
+    set CABMAJOR=%%a
+    set CABMINOR=%%b
+    set CABREV=%%c
+    set CABPATCH=%%d
+)
+
+set "_cabal_ok=0"
+if %CABMAJOR% gtr 2 set _cabal_ok=1
+if %CABMAJOR% equ 2 (
+    if %CABMINOR% geq 2 set _cabal_ok=1
+)
+if %_cabal_ok% equ 1 (
+    "%CABAL%" --project-file=%PROJ% new-build %CABFLAGS% -j exe:hadrian
+    rem use new-exec instead of new-run to make sure that the build-tools (alex & happy) are in PATH
+    "%CABAL%" --project-file=%PROJ% new-exec  %CABFLAGS%    hadrian -- ^
+        --directory "%CD%" ^
+        %*
+) else (
+    echo Cabal version is too old; you need at least cabal-install 2.2
+    exit /B 2
+)