.github: Port go update action from old coreos-overlay

.github/workflows/go-apply-patch.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "${GHA_SCRIPTS_DIR}/.github/workflows/common.sh"
+
+prepare_git_repo
+
+# create a mapping between short version and new version, e.g. 1.16 -> 1.16.3
+declare -A VERSIONS
+for version_new in ${VERSIONS_NEW}; do
+  version_new_trimmed="${version_new%.*}"
+  if [[ "${version_new_trimmed%.*}" = "${version_new_trimmed}" ]]; then
+    version_new_trimmed="${version_new}"
+  fi
+  VERSIONS["${version_new_trimmed}"]="${version_new}"
+done
+
+branch_name="go-$(join_by '-and-' ${VERSIONS_NEW})-main"
+
+# Parse the Manifest file for already present source files and keep the latest version in the current series
+# DIST go1.17.src.tar.gz ... => 1.17
+# DIST go1.17.1.src.tar.gz ... => 1.17.1
+declare -a UPDATED_VERSIONS_OLD UPDATED_VERSIONS_NEW
+any_different=0
+for version_short in "${!VERSIONS[@]}"; do
+  pushd "${SDK_OUTER_OVERLAY}"
+  VERSION_NEW="${VERSIONS["${version_short}"]}"
+  VERSION_OLD=$(sed -n "s/^DIST go\(${version_short}\(\.*[0-9]*\)\?\)\.src.*/\1/p" dev-lang/go/Manifest | sort -ruV | head -n1)
+  if [[ -z "${VERSION_OLD}" ]]; then
+    echo "${version_short} is not packaged, skipping"
+    popd
+    continue
+  fi
+  if [[ "${VERSION_NEW}" = "${VERSION_OLD}" ]]; then
+    echo "${version_short} is already at the latest (${VERSION_NEW}), skipping"
+    popd
+    continue
+  fi
+  UPDATED_VERSIONS_OLD+=("${VERSION_OLD}")
+  UPDATED_VERSIONS_NEW+=("${VERSION_NEW}")
+
+  any_different=1
+  EBUILD_FILENAME=$(get_ebuild_filename dev-lang/go "${VERSION_OLD}")
+  git mv "${EBUILD_FILENAME}" "dev-lang/go/go-${VERSION_NEW}.ebuild"
+
+  popd
+
+  URL="https://go.dev/doc/devel/release#go${VERSION_NEW}"
+
+  generate_update_changelog 'Go' "${VERSION_NEW}" "${URL}" 'go'
+
+  commit_changes dev-lang/go "${VERSION_OLD}" "${VERSION_NEW}"
+done
+
+cleanup_repo
+
+if [[ $any_different -eq 0 ]]; then
+  echo "go packages were already at the latest versions, nothing to do"
+  exit 0
+fi
+
+vo_gh="$(join_by ' and ' "${UPDATED_VERSIONS_OLD[@]}")"
+vn_gh="$(join_by ' and ' "${UPDATED_VERSIONS_NEW[@]}")"
+
+echo "VERSIONS_OLD=${vo_gh}" >>"${GITHUB_OUTPUT}"
+echo "VERSIONS_NEW=${vn_gh}" >>"${GITHUB_OUTPUT}"
+echo "BRANCH_NAME=${branch_name}" >>"${GITHUB_OUTPUT}"
+echo 'UPDATE_NEEDED=1' >>"${GITHUB_OUTPUT}"

.github/workflows/go-current-major-versions.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "${GHA_SCRIPTS_DIR}/.github/workflows/common.sh"
+
+pushd "${SDK_OUTER_OVERLAY}"
+
+versions=()
+for ebuild in dev-lang/go/go-*.ebuild; do
+    version="${ebuild##*/go-}" # 1.20.1-r1.ebuild or 1.19.ebuild
+    version="${version%.ebuild}" # 1.20.1-r1 or 1.19
+    version="${version%%-*}" # 1.20.1 or 1.19
+    short_version="${version%.*}" # 1.20 or 1
+    if [[ "${short_version%.*}" = "${short_version}" ]]; then
+        # fix short version
+        short_version="${version}"
+    fi
+
+    versions+=($(git ls-remote --tags https://github.com/golang/go | \
+                     cut -f2 | \
+                     sed --quiet "/refs\/tags\/go${short_version}\(\.[0-9]*\)\?$/s/^refs\/tags\/go//p" | \
+                     grep --extended-regexp --invert-match --regexp='(beta|rc)' | \
+                     sort --reverse --unique --version-sort | \
+                     head --lines=1))
+done
+
+popd
+
+echo "VERSIONS_NEW=${versions[*]}" >>"${GITHUB_OUTPUT}"

.github/workflows/go-release-main.yaml

@@ -0,0 +1,47 @@
+name: Get the latest Go release for main
+on:
+  schedule:
+    - cron:  '15 7 * * 1'
+  workflow_dispatch:
+
+jobs:
+  get-go-releases:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out scripts
+        uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          path: scripts
+      - name: Figure out latest Go release versions
+        id: go-latest-release
+        env:
+          GHA_SCRIPTS_DIR: "${{ github.workspace }}/scripts"
+          WORK_SCRIPTS_DIR: "${{ github.workspace }}/scripts"
+        run: scripts/.github/workflows/go-current-major-versions.sh
+      - name: Set up Flatcar SDK
+        id: setup-flatcar-sdk
+        env:
+          WORK_SCRIPTS_DIR: "${{ github.workspace }}/scripts"
+          CHANNEL: main
+        run: scripts/.github/workflows/setup-flatcar-sdk.sh
+      - name: Apply patch for main
+        id: apply-patch-main
+        env:
+          GHA_SCRIPTS_DIR: "${{ github.workspace }}/scripts"
+          WORK_SCRIPTS_DIR: "${{ github.workspace }}/scripts"
+          VERSIONS_NEW: ${{ steps.go-latest-release.outputs.VERSIONS_NEW }}
+          PACKAGES_CONTAINER: ${{ steps.setup-flatcar-sdk.outputs.PACKAGES_CONTAINER }}
+          SDK_NAME: ${{ steps.setup-flatcar-sdk.outputs.SDK_NAME }}
+        run: scripts/.github/workflows/go-apply-patch.sh
+      - name: Create pull request for main
+        uses: peter-evans/create-pull-request@v5
+        if: steps.apply-patch-main.outputs.UPDATE_NEEDED == 1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          path: scripts
+          branch: ${{ steps.apply-patch-main.outputs.BRANCH_NAME }}
+          base: main
+          title: Upgrade Go from ${{ steps.apply-patch-main.outputs.VERSIONS_OLD }} to ${{ steps.apply-patch-main.outputs.VERSIONS_NEW }}
+          body: Subject says it all.
+          labels: main