feat: allow a custom draft release tag prefix (#159)

actions/draft-release/action.yml

@@ -15,6 +15,9 @@ inputs:
   github-token:
     description: "GitHub token for authenticating gh CLI"
     required: true
+  tag-prefix:
+    description: "Release tag prefix"
+    default: "v"
   signing-key:
     description: "ASCII-armored OpenPGP secret key (LINUX_SIGNING_KEY) that signs the Linux packages and SHA256SUMS.txt; empty publishes them unsigned"
     required: false
@@ -72,13 +75,14 @@ runs:
       shell: bash
       working-directory: artifacts
       env:
+        TAG_PREFIX: ${{ inputs.tag-prefix }}
         VERSION: ${{ inputs.version }}
         APP_TITLE: ${{ inputs.app-title }}
         PRERELEASE: ${{ inputs.prerelease }}
         GH_TOKEN: ${{ inputs.github-token }}
         GH_REPO: ${{ github.repository }}
       run: |
-        tag="v$VERSION"
+        tag="${TAG_PREFIX}$VERSION"
         title="$APP_TITLE v$VERSION"
         pre=()
         if [ "$PRERELEASE" = "true" ]; then pre=(--prerelease); fi

tests/test_release_tag_prefix.py

@@ -0,0 +1,33 @@
+"""Exercise draft release tag selection without contacting GitHub."""
+import json
+import os
+from pathlib import Path
+import subprocess
+import tempfile
+import unittest
+
+import yaml
+
+
+class ReleaseTagPrefixTests(unittest.TestCase):
+    def test_default_and_custom_tags(self):
+        action = yaml.load(
+            (Path(__file__).resolve().parents[1] / "actions/draft-release/action.yml").read_text(),
+            Loader=yaml.BaseLoader,
+        )
+        step = next(s for s in action["runs"]["steps"] if s["name"] == "Create or update draft release")
+        self.assertEqual(step["env"]["TAG_PREFIX"], "${{ inputs.tag-prefix }}")
+        for prefix in (action["inputs"]["tag-prefix"]["default"], "artcraft-linux-v"):
+            with self.subTest(prefix=prefix), tempfile.TemporaryDirectory() as tmp:
+                root = Path(tmp)
+                gh = root / "gh"
+                gh.write_text('#!/usr/bin/env python3\nimport json,sys\nfrom pathlib import Path\nwith Path("calls").open("a") as f: f.write(json.dumps(sys.argv[1:])+"\\n")\nsys.exit(1 if sys.argv[1:3] == ["release", "view"] else 0)\n')
+                gh.chmod(0o755)
+                (root / "SHA256SUMS.txt").write_text("checksum  package.deb\n")
+                subprocess.run(["bash", "-e", "-c", step["run"]], cwd=root, check=True,
+                               capture_output=True, env=dict(os.environ, PATH=f"{root}:{os.environ['PATH']}",
+                               TAG_PREFIX=prefix, VERSION="0.42.0", APP_TITLE="Studio", PRERELEASE="false",
+                               GITHUB_SHA="a" * 40, GITHUB_STEP_SUMMARY=str(root / "summary")))
+                calls = [json.loads(line) for line in (root / "calls").read_text().splitlines()]
+                self.assertEqual(calls[0][:3], ["release", "view", prefix + "0.42.0"])
+                self.assertEqual(calls[1][:3], ["release", "create", prefix + "0.42.0"])