Set output venv when activate-environment is used (#627)

Closes: #622

Author: eifinger

.github/workflows/test.yml

@@ -334,6 +334,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Install latest version
+        id: setup-uv
         uses: ./
         with:
           python-version: 3.13.1t
@@ -348,6 +349,19 @@ jobs:
             exit 1
           fi
         shell: bash
+      - name: Verify output venv is set
+        run: |
+          if [ -z "$UV_VENV" ]; then
+            echo "output venv is not set"
+            exit 1
+          fi
+          if [ ! -d "$UV_VENV" ]; then
+            echo "output venv not point to a directory: $UV_VENV"
+            exit 1
+          fi
+        shell: bash
+        env:
+          UV_VENV: ${{ steps.setup-uv.outputs.venv }}
 
   test-musl:
     runs-on: ubuntu-latest

action.yml

@@ -86,6 +86,8 @@ outputs:
     description: "The path to the installed uvx binary."
   cache-hit:
     description: "A boolean value to indicate a cache entry was found"
+  venv:
+    description: "Path to the activated venv if activate-environment is true"
 runs:
   using: "node24"
   main: "dist/setup/index.js"

dist/setup/index.js

@@ -213,15 +213,14 @@ async function activateEnvironment(): Promise<void> {
     core.info("Activating python venv...");
     await exec.exec("uv", execArgs);
 
-    let venvBinPath = `${workingDirectory}${path.sep}.venv${path.sep}bin`;
+    const venvPath = path.resolve(`${workingDirectory}${path.sep}.venv`);
+    let venvBinPath = `${venvPath}${path.sep}bin`;
     if (process.platform === "win32") {
-      venvBinPath = `${workingDirectory}${path.sep}.venv${path.sep}Scripts`;
+      venvBinPath = `${venvPath}${path.sep}Scripts`;
     }
     core.addPath(path.resolve(venvBinPath));
-    core.exportVariable(
-      "VIRTUAL_ENV",
-      path.resolve(`${workingDirectory}${path.sep}.venv`),
-    );
+    core.exportVariable("VIRTUAL_ENV", venvPath);
+    core.setOutput("venv", venvPath);
   }
 }