init!

2026-04-13 16:15:46 +01:00
commit 3187bb5502
14 changed files with 521 additions and 0 deletions
@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+: "${FILE:?FILE is required}"
+: "${LATEST_RELEASE_URL:?LATEST_RELEASE_URL is required}"
+: "${DOWNLOAD_URL_TEMPLATE:?DOWNLOAD_URL_TEMPLATE is required}"
+
+if command -v python >/dev/null 2>&1; then
+  PYTHON_BIN=python
+elif command -v python3 >/dev/null 2>&1; then
+  PYTHON_BIN=python3
+else
+  echo "python is required but was not found"
+  exit 1
+fi
+
+version_strip_prefix="${LATEST_VERSION_STRIP_PREFIX:-v}"
+release_tag_template="${RELEASE_TAG_TEMPLATE:-{version}}"
+release_tag_template="${release_tag_template//$'\r'/}"
+
+current_version=$($PYTHON_BIN - <<'PY'
+import re
+import os
+p=os.environ["FILE"]
+s=open(p).read()
+m=re.search(r'version\s*=\s*"([^"]+)";', s)
+print(m.group(1) if m else "")
+PY
+)
+
+latest_version=$(curl -fsSLI -o /dev/null -w '%{url_effective}' "$LATEST_RELEASE_URL" \
+  | sed -E 's#.*/##')
+
+if [ -n "$version_strip_prefix" ]; then
+  latest_version="${latest_version#${version_strip_prefix}}"
+fi
+
+echo "current=$current_version"
+echo "latest=$latest_version"
+
+if [ -z "$latest_version" ] || [ "$latest_version" = "$current_version" ]; then
+  echo "updated=false" >> "$GITHUB_OUTPUT"
+  exit 0
+fi
+
+download_url="${DOWNLOAD_URL_TEMPLATE//\{version\}/$latest_version}"
+new_hash=$(nix store prefetch-file --json "$download_url" | "$PYTHON_BIN" -c 'import json,sys; print(json.load(sys.stdin)["hash"])')
+
+export LATEST_VERSION="$latest_version"
+export NEW_HASH="$new_hash"
+
+"$PYTHON_BIN" - <<'PY'
+import os
+import re
+p=os.environ["FILE"]
+s=open(p).read()
+s=re.sub(r'version\s*=\s*"[^"]+"', f'version = "{os.environ["LATEST_VERSION"]}"', s, count=1)
+s=re.sub(r'hash\s*=\s*"[^"]+"', f'hash = "{os.environ["NEW_HASH"]}"', s, count=1)
+open(p,"w").write(s)
+PY
+
+release_tag="${release_tag_template//\{version\}/$latest_version}"
+release_tag="${release_tag#\{}"
+release_tag="${release_tag%\}}"
+release_tag="${release_tag#\'}"
+release_tag="${release_tag%\'}"
+release_url="${LATEST_RELEASE_URL%/latest}/tag/${release_tag}"
+
+echo "updated=true" >> "$GITHUB_OUTPUT"
+echo "version=$latest_version" >> "$GITHUB_OUTPUT"
+echo "previous_version=$current_version" >> "$GITHUB_OUTPUT"
+echo "release_url=$release_url" >> "$GITHUB_OUTPUT"