Fix #130: ensure cabal installdir is in the PATH

.github/workflows/workflow.yml

@@ -78,6 +78,11 @@ jobs:
           cabal-version: ${{ matrix.cabal }}
           cabal-update: ${{ matrix.cabal_update }}
 
+      - name: Show installed versions
+        run: |
+          cabal --version
+          ghc --version
+
       - name: Test runghc
         run: |
           runghc --version
@@ -91,16 +96,19 @@ jobs:
         working-directory: setup/__tests__/project
         run: cabal run
 
+      - name: Install test project
+        working-directory: setup/__tests__/project
+        run: cabal install
+
+      - name: Run installed test project
+        run: hello-haskell-setup
+        # This tests whether the default installdir has been added to the PATH (issue #130).
+
       - name: Build and run test with Hackage dependency
         if:   ${{ matrix.cabal_update != 'false' }}
         working-directory: setup/__tests__/project-with-hackage-dependency
         run:  cabal build && cabal run
 
-      - name: Show installed versions
-        run: |
-          cabal --version
-          ghc --version
-
       - name: Confirm installed and expected versions match
         shell: bash
         # check that if given in the matrix, the actual version matches:

setup/__tests__/project/project.cabal

@@ -3,7 +3,7 @@ name:                project
 version:             0.1.0.0
 build-type:          Simple
 
-executable project
+executable hello-haskell-setup
   main-is:             Main.hs
   build-depends:       base
   default-language:    Haskell2010

setup/src/setup-haskell.ts

@@ -57,6 +57,10 @@ export default async function run(
           core.setOutput('cabal-store', 'C:\\sr');
         } else {
           core.setOutput('cabal-store', `${process.env.HOME}/.cabal/store`);
+          // Issue #130: for non-choco installs, add ~/.cabal/bin to PATH
+          const installdir = `${process.env.HOME}/.cabal/bin`;
+          core.info(`Adding ${installdir} to PATH`);
+          core.addPath(installdir);
         }
 
         // Workaround the GHC nopie linking errors for ancient GHC versions