Implement updater

.github/workflows/updater.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+#=================================================
+# PACKAGE UPDATING HELPER
+#=================================================
+
+# This script is meant to be run by GitHub Actions
+# The YunoHost-Apps organisation offers a template Action to run this script periodically
+# Since each app is different, maintainers can adapt its contents so as to perform
+# automatic actions when a new upstream release is detected.
+
+#=================================================
+# FETCHING LATEST RELEASE AND ITS ASSETS
+#=================================================
+
+# Fetching information
+current_version=$(cat manifest.json | jq -j '.version|split("~")[0]')
+repo=$(cat manifest.json | jq -j '.upstream.code|split("https://github.com/")[1]')
+# Some jq magic is needed, because the latest upstream release is not always the latest version (e.g. security patches for older versions)
+version=$(curl --silent "https://api.github.com/repos/$repo/releases" | jq -r '.[] | select( .prerelease != true ) | .tag_name' | sort -V | tail -1)
+
+# Later down the script, we assume the version has only digits and dots
+# Sometimes the release name starts with a "v", so let's filter it out.
+# You may need more tweaks here if the upstream repository has different naming conventions. 
+if [[ ${version:0:1} == "v" || ${version:0:1} == "V" ]]; then
+    version=${version:1}
+fi
+
+# Setting up the environment variables
+echo "Current version: $current_version"
+echo "Latest release from upstream: $version"
+echo "VERSION=$version" >> $GITHUB_ENV
+echo "REPO=$repo" >> $GITHUB_ENV
+# For the time being, let's assume the script will fail
+echo "PROCEED=false" >> $GITHUB_ENV
+
+# Proceed only if the retrieved version is greater than the current one
+if ! dpkg --compare-versions "$current_version" "lt" "$version" ; then
+    echo "::warning ::No new version available"
+    exit 0
+# Proceed only if a PR for this new version does not already exist
+elif git ls-remote -q --exit-code --heads https://github.com/$GITHUB_REPOSITORY.git ci-auto-update-v$version ; then
+    echo "::warning ::A branch already exists for this update"
+    exit 0
+fi
+
+#=================================================
+# UPDATE SOURCE FILES
+#=================================================
+
+sed -i  "s/GRAFANA_VERSION=.*/GRAFANA_VERSION=\"$version\"/" scripts/_common.sh
+echo "... scripts/_common.sh updated"
+
+#=================================================
+# SPECIFIC UPDATE STEPS
+#=================================================
+
+# Any action on the app's source code can be done.
+# The GitHub Action workflow takes care of committing all changes after this script ends.
+
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+
+# Replace new version in manifest
+echo "$(jq -s --indent 4 ".[] | .version = \"$version~ynh1\"" manifest.json)" > manifest.json
+
+# No need to update the README, yunohost-bot takes care of it
+
+# The Action will proceed only if the PROCEED environment variable is set to true
+echo "PROCEED=true" >> $GITHUB_ENV
+exit 0

.github/workflows/updater.yml

@@ -0,0 +1,50 @@
+# This workflow allows GitHub Actions to automagically update your app whenever a new upstream release is detected.
+# You need to enable Actions in your repository settings, and fetch this Action from the YunoHost-Apps organization.
+# This file should be enough by itself, but feel free to tune it to your needs.
+# It calls updater.sh, which is where you should put the app-specific update steps.
+name: Check for new upstream releases
+on:
+  # Allow to manually trigger the workflow
+  workflow_dispatch:
+  # Run it every day at 6:00 UTC
+  schedule:
+    - cron:  '0 6 * * *'
+jobs:
+  updater:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch the source code
+        uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Run the updater script
+        id: run_updater
+        run: |
+          # Setting up Git user
+          git config --global user.name 'yunohost-bot'
+          git config --global user.email 'yunohost-bot@users.noreply.github.com'
+          # Run the updater script
+          /bin/bash .github/workflows/updater.sh
+      - name: Commit changes
+        id: commit
+        if: ${{ env.PROCEED == 'true' }}
+        run: |
+          git commit -am "Upgrade to v$VERSION"
+      - name: Create Pull Request
+        id: cpr
+        if: ${{ env.PROCEED == 'true' }}
+        uses: peter-evans/create-pull-request@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Update to version ${{ env.VERSION }}
+          committer: 'yunohost-bot <yunohost-bot@users.noreply.github.com>'
+          author: 'yunohost-bot <yunohost-bot@users.noreply.github.com>'
+          signoff: false
+          base: testing
+          branch: ci-auto-update-v${{ env.VERSION }}
+          delete-branch: true
+          title: 'Upgrade to version ${{ env.VERSION }}'
+          body: |
+            Upgrade to v${{ env.VERSION }}
+          draft: false
+

manifest.json

@@ -4,7 +4,7 @@
     "packaging_format": 1,
     "description": {
         "en": "Metric & analytic dashboards for monitoring",
-        "fr": "Tableaux de bords de supervision"
+        "fr": "Tableaux de bord de supervision"
     },
     "version": "9.1.2~ynh1",
     "url": "https://grafana.com/oss/grafana/",
@@ -12,7 +12,7 @@
         "license": "AGPL-3.0-only",
         "website": "https://grafana.com/",
         "demo": "https://play.grafana.org",
-        "code": "https://github.com/grafana/"
+        "code": "https://github.com/grafana/grafana"
     },
     "license": "AGPL-3.0-only",
     "maintainer": {