add formatter overrides in action

.github/workflows/online_test_deck.yml

@@ -38,7 +38,7 @@ jobs:
           sudo podman pull ghcr.io/ublue-os/bazzite-deck:${{ github.event.inputs.ref }}
       - name: Run Rechunker
         id: rechunk
-        uses: ./. # IMPORTANT: Use a tag, e.g.: "hhd-dev/[email protected].2"
+        uses: ./. # IMPORTANT: Use a tag, e.g.: "hhd-dev/[email protected].4"
         with:
           ref: 'ghcr.io/ublue-os/bazzite-deck:${{ github.event.inputs.ref }}'
           prev-ref: ghcr.io/hhd-dev/bazzite-automated-deck:stable
@@ -92,6 +92,14 @@ jobs:
             Package Changes:
             <pkgupd>
 
+          formatters: |
+            commits.none=No changes\n
+            commits.commit=- **[<short>](https://github.com/hhd-dev/rechunk/commit/<hash>)** <subject>\n
+            pkgupd.none=No package updates\n
+            pkgupd.add=- **<package>** Added at <new>\n
+            pkgupd.update=- **<package>** <old> → <new>\n
+            pkgupd.remove=- **<package>** <old> → Removed\n
+
       - name: Upload Changelog
         uses: actions/upload-artifact@v4
         with:

3_chunk.sh

@@ -85,30 +85,41 @@ if [ -n "$CLEAR_PLAN" ]; then
     PREV_ARG+=("--clear-plan")
 fi
 
-LABEL_ARR=()
+ARG_ARR=()
 if [ -n "$LABELS" ]; then
     IFS=$'\n'
     for label in $LABELS; do
         if [ -z "$label" ]; then
             continue
         fi
-        LABEL_ARR+=("--label" "$label")
+        ARG_ARR+=("--label" "$label")
     done
     unset IFS
 fi
+if [ -n "$FORMATTERS" ]; then
+    IFS=$'\n'
+    for form in $FORMATTERS; do
+        if [ -z "$form" ]; then
+            continue
+        fi
+        ARG_ARR+=("--formatter" "$(echo $form)")
+    done
+    unset IFS
+fi
+
 if [ -n "$DESCRIPTION" ]; then
     echo "Writing description to 'org.opencontainers.image.description'"
-    LABEL_ARR+=("--label" "org.opencontainers.image.description=$DESCRIPTION")  
+    ARG_ARR+=("--label" "org.opencontainers.image.description=$DESCRIPTION")  
 fi
 
 echo Executing command:
 echo $RECHUNK -r "$REPO" -b "$OUT_TAG" -c "$CONTENT_META" \
     --changelog-fn "${OUT_NAME}.changelog.txt" \
-    "${PREV_ARG[@]}" "${LABEL_ARR[@]}"
+    "${PREV_ARG[@]}" "${ARG_ARR[@]}"
 
 $RECHUNK -r "$REPO" -b "$OUT_TAG" -c "$CONTENT_META" \
     --changelog-fn "${OUT_NAME}.changelog.txt" \
-    "${PREV_ARG[@]}" "${LABEL_ARR[@]}"
+    "${PREV_ARG[@]}" "${ARG_ARR[@]}"
 
 
 PREV_ARG=""

action.yml

@@ -79,6 +79,19 @@ inputs:
       tag along with the git path.
       If <commit> is not used, providing it as part of a "org.opencontainers.image.revision"
       is the same.
+  formatters:
+    description: |
+      The formatters to use for the changelog. The format is as follows:
+      ```
+      formatter=<format>
+      ```
+      Formatter is a string up to the first = and defines the formatter name. 
+      After that and until the end of the line is the format. 
+      Use \n for newlines. Different formatters use different
+      substitutions (e.g., <name>), refer to the examples for specifics.
+
+      You can use the characters `<`, `>`, `=` freely. Substitution is only
+      performed on exact tag matches.
 
 outputs:
   ref:
@@ -165,6 +178,7 @@ runs:
             -e PREV_REF="${{ inputs.prev-ref }}" \
             -e OUT_NAME="$OUT_NAME" \
             -e LABELS="${{ inputs.labels }}" \
+            -e FORMATTERS="${{ inputs.formatters }}" \
             -e VERSION="${{ inputs.version }}" \
             -e VERSION_FN="/workspace/version.txt" \
             -e PRETTY="${{ inputs.pretty }}" \

src/rechunk/__main__.py

@@ -62,7 +62,15 @@ def argparse_func():
         default=None,
     )
     parser.add_argument(
-        "-l", "--label", help="Add labels to the output image.", action="append"
+        "-l",
+        "--label",
+        help="Add labels to the output image (`label=var`).",
+        action="append",
+    )
+    parser.add_argument(
+        "--formatter",
+        help="Override string formatters for tags for i18n (`formatter=var`).",
+        action="append",
     )
     parser.add_argument("--pretty", help="Pretty version string.", default=None)
     parser.add_argument(
@@ -126,6 +134,15 @@ def argparse_func():
     )
 
     args = parser.parse_args()
+
+    # Parse formatters
+    formatters = {}
+    for line in args.formatter:
+        if "=" not in line:
+            continue
+        idx = line.index("=")
+        formatters[line[:idx]] = line[idx + 1 :]
+
     alg_main(
         repo=args.repo,
         ref=args.ref,
@@ -145,6 +162,7 @@ def argparse_func():
         changelog=args.changelog,
         changelog_fn=args.changelog_fn,
         clear_plan=args.clear_plan,
+        formatters=formatters,
     )
 
 

src/rechunk/alg.py

@@ -547,6 +547,7 @@ def main(
     changelog: str | None = None,
     changelog_fn: str | None = None,
     clear_plan: bool = False,
+    formatters: dict[str, str] = {},
 ):
     if not meta_fn:
         meta_fn = get_default_meta_yaml()
@@ -655,6 +656,7 @@ def main(
         changelog_template=changelog,
         changelog_fn=changelog_fn,
         info=info,
+        formatters=formatters,
     )
 
     if contentmeta_fn:

src/rechunk/utils.py

@@ -18,6 +18,15 @@
 VERSION_TAG = "org.opencontainers.image.version"
 REVISION_TAG = "org.opencontainers.image.revision"
 
+DEFAULT_FORMATTERS = {
+    "commits.none": "-\n",
+    "commits.commit": "- **<short>** <subject>\n",
+    "pkgupd.none": "-\n",
+    "pkgupd.update": " - **<package>**: <old> → <new>\n",
+    "pkgupd.add": " - **<package>**: x → <new>\n",
+    "pkgupd.remove": " - **<package>**: <old> → x\n",
+}
+
 
 class tqdm(tqdm_orig):
     def __init__(self, *args, **kwargs):
@@ -136,14 +145,19 @@ def get_update_matrix(packages: list[MetaPackage], biweekly: bool = True):
     return p_upd
 
 
-def get_commits(git_dir: str | None, revision: str | None, prev_rev: str | None):
+def get_commits(
+    git_dir: str | None,
+    revision: str | None,
+    prev_rev: str | None,
+    formatters: dict[str, str],
+):
     logger.info(f"Getting commits from '{prev_rev}' to '{revision}' in '{git_dir}'")
     if not git_dir or not revision or not prev_rev:
         return ""
 
     out = ""
     try:
-        cmd = f"git --git-dir='{git_dir}/.git' log --format=\"%t/%s\" --no-merges {prev_rev}..{revision}"
+        cmd = f"git --git-dir='{git_dir}/.git' log --format=\"%t/%T/%s\" --no-merges {prev_rev}..{revision}"
         for commit in (
             subprocess.run(cmd, stdout=subprocess.PIPE, shell=True)
             .stdout.decode("utf-8")
@@ -152,12 +166,27 @@ def get_commits(git_dir: str | None, revision: str | None, prev_rev: str | None)
             if not "/" in commit:
                 continue
             idx = commit.index("/")
-            out += f" - **{commit[:idx]}** {commit[idx+1:]}\n"
+            short = commit[:idx]
+            rest = commit[idx + 1 :]
+            idx = rest.index("/")
+            hash = rest[:idx]
+            commit = rest[idx + 1 :]
+            out += (
+                formatters["commits.commit"]
+                .replace("<short>", short)
+                .replace("<subject>", commit)
+                .replace("<hash>", hash)
+            )
     except Exception as e:
         logger.error(f"Failed to get commits: {e}")
     return out
 
-def get_package_update_str(base_pkg: Sequence[Package] | None, info: ExportInfo | None):
+
+def get_package_update_str(
+    base_pkg: Sequence[Package] | None,
+    info: ExportInfo | None,
+    formatters: dict[str, str],
+):
     if not base_pkg or not info or not info.get("packages", None):
         return ""
 
@@ -169,33 +198,51 @@ def get_package_update_str(base_pkg: Sequence[Package] | None, info: ExportInfo
         if p.name in seen:
             continue
         seen.add(p.name)
-        
+
         if p.name not in previous:
-            out += f" - {p.name}: x → {p.version}\n"
+            out += (
+                formatters["pkgupd.add"]
+                .replace("<new>", p.version)
+                .replace("<package>", p.name)
+            )
         else:
             pv = previous[p.name]
             # Skip release for package version updates
             if "-" in pv:
                 prel = pv[pv.rindex("-") + 1 :]
-                pv = pv[:pv.rindex("-")]
+                pv = pv[: pv.rindex("-")]
             else:
                 prel = None
 
             if p.version != pv:
-                out += f" - {p.name}: {pv} → {p.version}\n"
+                prev = pv
+                newv = p.version
             elif prel and p.release != prel:
-                out += f" - {p.name}: {pv}-{prel} → {p.version}-{p.release}\n"
-
+                prev = f"{pv}-{prel}"
+                newv = f"{p.version}-{p.release}"
+            else:
+                continue
+
+            out += (
+                formatters["pkgupd.update"]
+                .replace("<old>", prev)
+                .replace("<new>", newv)
+                .replace("<package>", p.name)
+            )
+
     for p in previous:
         if p not in seen:
             pv = previous[p]
             if "-" in pv:
-                pv = pv[:pv.rindex("-")]
-            out += f" - {p}: {pv} → x\n"
+                pv = pv[: pv.rindex("-")]
+            out += (
+                formatters["pkgupd.remove"].replace("<old>", pv).replace("<package>", p)
+            )
         seen.add(p)
 
     return out
 
+
 def get_labels(
     labels: Sequence[str],
     version: str | None,
@@ -209,13 +256,16 @@ def get_labels(
     changelog_template: str | None,
     changelog_fn: str | None,
     info: ExportInfo | None,
+    formatters: dict[str, str] = {},
 ) -> tuple[dict[str, str], str]:
+    formatters = {**DEFAULT_FORMATTERS, **formatters}
+
     # Date format is YYMMDD
     # Timestamp format is YYYY-MM-DDTHH:MM:SSZ
     now = datetime.now()
     date = now.strftime("%y%m%d")
     timestamp = now.strftime("%Y-%m-%dT%H:%M:%SZ")
-    pkgupd = get_package_update_str(base_pkg, info)
+    pkgupd = get_package_update_str(base_pkg, info, formatters)
 
     prev_labels = prev_manifest.get("Labels", {}) if prev_manifest else {}
     prev_version = prev_labels.get(VERSION_TAG, None) if prev_labels else None
@@ -266,6 +316,7 @@ def get_labels(
         git_dir,
         revision,
         (info or {}).get("revision", None) or prev_labels.get(REVISION_TAG, None),
+        formatters=formatters,
     )
 
     def process_label(key: str, value: str):
@@ -285,9 +336,9 @@ def process_label(key: str, value: str):
             value = value.replace("<imginfo>", imginfo)
             blacklist[key] = BLACKLIST_KEY
         if "<commits>" in value:
-            value = value.replace("<commits>", commit_str or "-")
+            value = value.replace("<commits>", commit_str or formatters["commits.none"])
         if "<pkgupd>" in value:
-            value = value.replace("<pkgupd>", pkgupd or "-")
+            value = value.replace("<pkgupd>", pkgupd or formatters["pkgupd.none"])
 
         if base_pkg:
             for pkg in base_pkg: