fix: multiline output

.github/workflows/test.yml

@@ -17,6 +17,69 @@ permissions:
   pull-requests: write
 
 jobs:
+  output:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: "Use output"
+        id: use-output
+        uses: ./
+        with:
+          version: latest
+          verb: core
+          args: container from --address=alpine with-exec --args echo,-n,"hello world" stdout
+      - name: "Use output (check)"
+        run: |
+          target='${{ steps.use-output.outputs.output }}'
+          if [[ "$target" == "hello world" ]]; then
+            echo "matches"
+            exit 0
+          else
+            echo "does not match"
+            exit 1
+          fi
+
+      - name: "Use trailing output"
+        id: use-trailing-output
+        uses: ./
+        with:
+          version: latest
+          verb: core
+          args: container from --address=alpine with-exec --args echo,-n,-e,"hello world\n" stdout
+      - name: "Use output (check)"
+        run: |
+          target='${{ steps.use-trailing-output.outputs.output }}'
+          result='hello world
+          '
+          if [[ "$target" == "$result" ]]; then
+            echo "matches"
+            exit 0
+          else
+            echo "does not match"
+            exit 1
+          fi
+
+      - name: "Use multiline output"
+        id: use-multiline-output
+        uses: ./
+        with:
+          version: latest
+          verb: core
+          args: container from --address=alpine with-exec --args echo,-n,-e,"hello\nworld" stdout
+      - name: "Use output (check)"
+        run: |
+          target='${{ steps.use-multiline-output.outputs.output }}'
+          result='hello
+          world'
+          if [[ "$target" == "$result" ]]; then
+            echo "matches"
+            exit 0
+          else
+            echo "does not match"
+            exit 1
+          fi
+
   version:
     runs-on: "ubuntu-latest"
     steps:

action.yml

@@ -80,17 +80,24 @@ runs:
         INPUT_MODULE: ${{ inputs.module }}
       run: |
         tmpout=$(mktemp)
-        ARGS="${{ inputs.args }}"
-        ARGS="${ARGS:-"${{ inputs.call }}"}"
         cd ${{ inputs.workdir }} && { \
         DAGGER_CLOUD_TOKEN=${{ inputs.cloud-token }} \
         dagger \
         ${{ inputs.dagger-flags }} \
         ${{ inputs.verb }} \
         ${INPUT_MODULE:+-m $INPUT_MODULE} \
-        $ARGS; } | tee "${tmpout}"
+        ${{ inputs.args || inputs.call }}; } | tee "${tmpout}"
 
-        (echo -n "stdout=" && cat "${tmpout}") >> "$GITHUB_OUTPUT"
+        {
+          # we need a delim that doesn't appear in the output - a hash of the
+          # file itself *probably* won't (if it does, we have larger
+          # cryptographic problems)
+          delim="$(sha256sum $tmpout | cut -d " " -f1)"
+          echo "stdout<<${delim}"
+          cat "${tmpout}"
+          echo
+          echo "${delim}"
+        } >> "$GITHUB_OUTPUT"
 
     - if: (inputs.call != '' || inputs.args != '') && inputs.engine-stop == 'true'
       shell: bash