bash script version watchdog (#462)

* impl version watchdog

* Update update.sh

Co-authored-by: Florian Kinder <florian.kinder@fankserver.com>

* increase update check frequency to per hour

* Update .github/workflows/update.yml

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* Update update.sh

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* Update update.sh

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* Update .github/workflows/update.yml

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* prevent schedule running on fork

---------

Co-authored-by: Florian Kinder <florian.kinder@fankserver.com>
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

.github/workflows/docker.yml

@@ -2,6 +2,9 @@ name: Docker build
 
 on:
   pull_request:
+  push:
+    tags:
+      - latest
 
 jobs:
   build:

.github/workflows/update.yml

@@ -0,0 +1,24 @@
+name: Check Update
+
+on:
+  schedule:
+    - cron: "0 * * * *"
+  workflow_dispatch:
+    inputs:
+      desc:
+        description: "desc"
+        required: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'schedule' || (github.event_name == 'schedule' && github.repository == 'factoriotools/factorio-docker')
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.REPO_TOKEN }}
+
+      - name: Run update script
+        run: ./update.sh
+        shell: bash

update.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+SEMVER_REGEX="^(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)$"
+
+version=$(curl 'https://www.factorio.com/updater/get-available-versions?apiVersion=2' | jq '.[] | .[] | select(.stable) | .stable' -r)
+sha256=$(curl "https://www.factorio.com/get-download/${version}/headless/linux64" -L | sha256sum | awk '{print $1}')
+currentversion=$(jq 'with_entries(select(contains({value:{tags:["stable"]}}))) | keys | .[0]' buildinfo.json -r)
+echo "version:$version currentversion:$currentversion"
+if [[ "$currentversion" == "$version" ]]; then
+    exit
+fi
+
+function get-semver(){
+    local ver=$1
+    local type=$2
+    if [[ "$ver" =~ $SEMVER_REGEX ]]; then
+        local major=${BASH_REMATCH[1]}
+        local minor=${BASH_REMATCH[2]}
+        local patch=${BASH_REMATCH[3]}
+    fi
+    case $type in
+        major)
+            echo $major
+            ;;
+        minor)
+            echo $minor
+            ;;
+        patch)
+            echo $patch
+            ;;
+    esac
+}
+
+versionMajor=$(get-semver $version major)
+versionMinor=$(get-semver $version minor)
+currentversionMajor=$(get-semver $currentversion major)
+currentversionMinor=$(get-semver $currentversion minor)
+
+versionShort=$versionMajor.$versionMinor
+currentversionShort=$currentversionMajor.$currentversionMinor
+echo "versionShort=$versionShort currentversionShort=$currentversionShort"
+
+tmpfile=$(mktemp)
+cp buildinfo.json "$tmpfile"
+if [[ $versionShort == $currentversionShort ]]; then
+    jq --arg currentversion $currentversion --arg version $version --arg sha256 $sha256 'with_entries(if .key == $currentversion then .key |= $version | .value.sha256 |= $sha256 | .value.tags |= . - [$currentversion] + [$version] else . end)' "$tmpfile" > buildinfo.json
+else
+    jq --arg currentversion $currentversion --arg version $version --arg sha256 $sha256 --arg versionShort $versionShort --arg versionMajor $versionMajor 'with_entries(if .key == $currentversion then .value.tags |= . - ["latest","stable",$versionMajor] else . end) | to_entries | . + [{ key: $version, value: { sha256: $sha256, tags: ["latest","stable",$versionMajor,$versionShort,$version]}}] | from_entries' "$tmpfile" > buildinfo.json
+fi
+rm -f -- "$tmpfile"
+
+git config user.name github-actions[bot]
+git config user.email 41898282+github-actions[bot]@users.noreply.github.com
+git add buildinfo.json
+git commit -a -m "Auto Update Factorio to version: $version"
+git tag -f latest
+git push
+git push origin --tags -f