From c4385b69d2515097edb9182cbc5c3934d22bf558 Mon Sep 17 00:00:00 2001
From: Kazuki Suda <kazuki.suda@gmail.com>
Date: Wed, 7 Dec 2022 22:13:29 +0900
Subject: [PATCH] Support packaging and pushing a specified chart only

Signed-off-by: Kazuki Suda <kazuki.suda@gmail.com>
---
 README.md         | 21 ++++++++++++++++++++-
 action.yml        |  6 +++++-
 src/entrypoint.sh | 12 ++++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 3f49b4b..6983f46 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ A GitHub Action for publishing Helm charts with Github Pages.
 
 Inputs:
 * `token` The GitHub token with write access to the target repository
-* `charts_dir` The charts directory, defaults to `charts`
+* `charts_dir` The charts directory, defaults to `charts`. It cannot be used with `chart_dir`.
 * `charts_url` The GitHub Pages URL, defaults to `https://<OWNER>.github.io/<REPOSITORY>`
 * `owner` The GitHub user or org that owns this repository, defaults to the owner in `GITHUB_REPOSITORY` env var
 * `repository` The GitHub repository, defaults to the `GITHUB_REPOSITORY` env var
@@ -21,6 +21,7 @@ Inputs:
 * `index_dir` The location of `index.yaml` file in the repo, defaults to the same value as `target_dir`
 * `enterprise_url` The URL of enterprise github server in the format `<server-url>/<organisation>`
 * `dependencies` A list of helm repositories required to verify dependencies in the format `<name>,<url>;<name>,<url>` or if using private repositories `<name>,<username>,<password>,<url>;<name>,<username>,<password>,<url>`. Combinations are allowed.
+* `chart_dir` The specified chart directory, e.g. charts/wordpress. It cannot be used with `charts_dir`.
 
 ## Examples
 
@@ -88,3 +89,21 @@ jobs:
           app_version: 1.16.0
           chart_version: 0.1.0
 ```
+Package and push the specified chart in `./charts/wordpress` dir to `gh-pages` branch:
+```yaml
+name: release
+on:
+  push:
+    tags: '*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Publish Helm charts
+        uses: stefanprodan/helm-gh-pages@master
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          chart_dir: charts/wordpress
+```
diff --git a/action.yml b/action.yml
index 946063d..439b5c8 100644
--- a/action.yml
+++ b/action.yml
@@ -9,7 +9,7 @@ inputs:
     description: "GitHub token"
     required: true
   charts_dir:
-    description: "The charts directory, defaults to `charts`"
+    description: "The charts directory, defaults to `charts`. It cannot be used with `chart_dir`."
     required: false
   charts_url:
     description: "The GitHub Pages URL, defaults to `https://<OWNER>.github.io/<REPOSITORY>`"
@@ -55,6 +55,9 @@ inputs:
   dependencies:
     description: "A list of helm repositories required to verify dependencies in the format '<name>,<url>;<name>,<url>'"
     required: false
+  chart_dir:
+    description: "The specified chart directory,, e.g. charts/wordpress. It cannot be used with `charts_dir`."
+    required: false
 runs:
   using: 'docker'
   image: 'Dockerfile'
@@ -75,3 +78,4 @@ runs:
     - ${{ inputs.index_dir }}
     - ${{ inputs.enterprise_url }}
     - ${{ inputs.dependencies }}
+    - ${{ inputs.chart_dir }}
diff --git a/src/entrypoint.sh b/src/entrypoint.sh
index 374ceb8..879ccbd 100644
--- a/src/entrypoint.sh
+++ b/src/entrypoint.sh
@@ -33,6 +33,7 @@ CHART_VERSION=${13}
 INDEX_DIR=${14}
 ENTERPRISE_URL=${15}
 DEPENDENCIES=${16}
+CHART_DIR=${17}
 
 CHARTS=()
 CHARTS_TMP_DIR=$(mktemp -d)
@@ -40,6 +41,11 @@ REPO_ROOT=$(git rev-parse --show-toplevel)
 REPO_URL=""
 
 main() {
+  if [[ -n "$CHARTS_DIR" ]] && [[ -n "$CHART_DIR" ]]; then
+      echo '"Both charts_dir" and "chart_dir" cannot be specified' >&2
+      exit 1
+  fi
+
   if [[ -z "$HELM_VERSION" ]]; then
       HELM_VERSION="3.10.0"
   fi
@@ -104,6 +110,12 @@ main() {
 }
 
 locate() {
+  if [[ -n "$CHART_DIR" ]]; then
+    echo "Use the specific chart directory ${CHART_DIR}"
+    CHARTS+=( "$CHART_DIR" )
+    return
+  fi
+
   for dir in $(find "${CHARTS_DIR}" -type d -mindepth 1 -maxdepth 1); do
     if [[ -f "${dir}/Chart.yaml" ]]; then
       CHARTS+=("${dir}")