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Signed-off-by: leecalcote <[email protected]>
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@leecalcote
leecalcote committed May 13, 2021
1 parent 7f199b0 commit 4c7099e
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67 changes: 67 additions & 0 deletions action.yml
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name: "Helm Chart Releaser For Remote"
description: "Host a Helm charts repo on GitHub repo"
author: "aisuko"
branding:
color: blue
icon: anchor
inputs:
version:
description: "The chart-releaser version to use"
config:
description: "The relative path to the chart-releaser config file"
charts_dir:
description: The charts directory
default: charts
charts_repo_url:
description: "The GitHub Pages URL to the charts repo (default: https://<owner>.github.io/<repo>)"
pages_branch:
description: The branch of chart's repo
activity:
description: activity (pr, push and none)
default: none
owner:
description: The repo owner
repo:
description: The chart repo
runs:
using: composite
steps:
- run: |
if [[ -n "${{ inputs.owner }}" ]]; then
args=(--owner "${{ inputs.owner }}")
else
owner=$(cut -d '/' -f 1 <<< "$GITHUB_REPOSITORY")
args=(--owner "$owner")
fi
if [[ -n "${{ inputs.repo }}" ]]; then
args+=(--repo "${{ inputs.repo }}")
else
repo=$(cut -d '/' -f 2 <<< "$GITHUB_REPOSITORY")
args+=(--repo "$repo")
fi
args+=(--charts-dir "${{ inputs.charts_dir }}")
if [[ -n "${{ inputs.version }}" ]]; then
args+=(--version "${{ inputs.version }}")
fi
if [[ -n "${{ inputs.config }}" ]]; then
args+=(--config "${{ inputs.config }}")
fi
if [[ -n "${{ inputs.charts_repo_url }}" ]]; then
args+=(--charts-repo-url "${{ inputs.charts_repo_url }}")
fi
if [[ -n "${{ inputs.pages_branch }}" ]]; then
args+=(--pages-branch "${{inputs.pages_branch}}")
fi
if [[ -n "${{ inputs.activity }}" ]]; then
args+=(--activity "${{inputs.activity}}")
fi
"$GITHUB_ACTION_PATH/cr.sh" "${args[@]}"
shell: bash
295 changes: 295 additions & 0 deletions cr.sh
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set -o errexit
set -o nounset
set -o pipefail

DEFAULT_CHART_RELEASER_VERSION=v1.2.0

show_help() {
cat << EOF
Usage: $(basename "$0") <options>
-h, --help Display help
-v, --version The chart-releaser version to use (default: $DEFAULT_CHART_RELEASER_VERSION)"
--config The path to the chart-releaser config file
-d, --charts-dir The charts directory (default: charts)
-u, --charts-repo-url The GitHub Pages URL to the charts repo (default: https://<owner>.github.io/<repo>)
-o, --owner The repo owner
-r, --repo The repo name
--page-branch The branch of index.yaml push or pr
--activity The activity of push or pr index.yaml
EOF
}

main() {
local version="$DEFAULT_CHART_RELEASER_VERSION"
local config=
local charts_dir=charts
local owner=
local repo=
local charts_repo_url=
local pages_branch=
local activity=

parse_command_line "$@"

: "${CR_TOKEN:?Environment variable CR_TOKEN must be set}"

local repo_root
repo_root=$(git rev-parse --show-toplevel)
pushd "$repo_root" > /dev/null

# echo 'Looking up latest tag...'
# local latest_tag
# latest_tag=$(lookup_latest_tag)

echo 'Looking up latest commit'
local latest_commit
latest_commit=$(lookup_latest_commit_id)

# echo "Discovering changed charts since '$latest_tag'..."
# local changed_charts=()
# readarray -t changed_charts <<< "$(lookup_changed_charts "$latest_tag")"

echo "Discovering changed charts since '$latest_commit'..."
local changed_charts=()
readarray -t changed_charts <<< "$(lookup_changed_charts "$latest_commit")"

if [[ -n "${changed_charts[*]}" ]]; then
install_chart_releaser

rm -rf .cr-release-packages
mkdir -p .cr-release-packages

rm -rf .cr-index
mkdir -p .cr-index

for chart in "${changed_charts[@]}"; do
if [[ -d "$chart" ]]; then
package_chart "$chart"
else
echo "Chart '$chart' no longer exists in repo. Skipping it..."
fi
done

release_charts
update_index
else
echo "Nothing to do. No chart changes detected."
fi

popd > /dev/null
}

parse_command_line() {
while :; do
case "${1:-}" in
-h|--help)
show_help
exit
;;
--config)
if [[ -n "${2:-}" ]]; then
config="$2"
shift
else
echo "ERROR: '--config' cannot be empty." >&2
show_help
exit 1
fi
;;
-v|--version)
if [[ -n "${2:-}" ]]; then
version="$2"
shift
else
echo "ERROR: '-v|--version' cannot be empty." >&2
show_help
exit 1
fi
;;
-d|--charts-dir)
if [[ -n "${2:-}" ]]; then
charts_dir="$2"
shift
else
echo "ERROR: '-d|--charts-dir' cannot be empty." >&2
show_help
exit 1
fi
;;
-u|--charts-repo-url)
if [[ -n "${2:-}" ]]; then
charts_repo_url="$2"
shift
else
echo "ERROR: '-u|--charts-repo-url' cannot be empty." >&2
show_help
exit 1
fi
;;
-o|--owner)
if [[ -n "${2:-}" ]]; then
owner="$2"
shift
else
echo "ERROR: '--owner' cannot be empty." >&2
show_help
exit 1
fi
;;
-r|--repo)
if [[ -n "${2:-}" ]]; then
repo="$2"
shift
else
echo "ERROR: '--repo' cannot be empty." >&2
show_help
exit 1
fi
;;
--pages-branch)
if [[ -n "${2:-}" ]]; then
pages_branch="$2"
shift
else
echo "ERROR: '--pages_branch' cannot be empty." >&2
show_help
exit 1
fi
;;
--activity)
if [[ -n "${2:-}" ]]; then
activity="$2"
shift
else
echo "ERROR: '--activity' cannot be empty." >&2
show_help
exit 1
fi
;;
*)
break
;;
esac

shift
done

if [[ -z "$owner" ]]; then
echo "ERROR: '-o|--owner' is required." >&2
show_help
exit 1
fi

if [[ -z "$repo" ]]; then
echo "ERROR: '-r|--repo' is required." >&2
show_help
exit 1
fi

if [[ -z "$charts_repo_url" ]]; then
charts_repo_url="https://$owner.github.io/$repo"
fi
}

install_chart_releaser() {
if [[ ! -d "$RUNNER_TOOL_CACHE" ]]; then
echo "Cache directory '$RUNNER_TOOL_CACHE' does not exist" >&2
exit 1
fi

local arch
arch=$(uname -m)

local cache_dir="$RUNNER_TOOL_CACHE/ct/$version/$arch"
if [[ ! -d "$cache_dir" ]]; then
mkdir -p "$cache_dir"

echo "Installing chart-releaser..."
curl -sSLo cr.tar.gz "https://github.com/helm/chart-releaser/releases/download/$version/chart-releaser_${version#v}_linux_amd64.tar.gz"
tar -xzf cr.tar.gz -C "$cache_dir"
rm -f cr.tar.gz

echo 'Adding cr directory to PATH...'
export PATH="$cache_dir:$PATH"
fi
}

lookup_latest_tag() {
git fetch --tags > /dev/null 2>&1

if ! git describe --tags --abbrev=0 2> /dev/null; then
git rev-list --max-parents=0 --first-parent HEAD
fi
}

# Return git commmit id
lookup_latest_commit_id(){
git rev-parse HEAD
}

filter_charts() {
while read -r chart; do
[[ ! -d "$chart" ]] && continue
local file="$chart/Chart.yaml"
if [[ -f "$file" ]]; then
echo "$chart"
else
echo "WARNING: $file is missing, assuming that '$chart' is not a Helm chart. Skipping." 1>&2
fi
done
}

lookup_changed_charts() {
local commit="$1"

local changed_files
changed_files=$(git diff --find-renames --name-only "$commit" -- "$charts_dir")

local depth=$(( $(tr "/" "\n" <<< "$charts_dir" | wc -l) + 1 ))
local fields="1-${depth}"

cut -d '/' -f "$fields" <<< "$changed_files" | uniq | filter_charts
}

package_chart() {
local chart="$1"

local args=("$chart" --package-path .cr-release-packages)
if [[ -n "$config" ]]; then
args+=(--config "$config")
fi

echo "Packaging chart '$chart'..."
cr package "${args[@]}"
}

release_charts() {
local args=(-o "$owner" -r "$repo")
if [[ -n "$config" ]]; then
args+=(--config "$config")
fi

echo 'Releasing charts...'
echo "The parameters below: ${args[@]}"
cr upload "${args[@]}"
}

update_index() {
local args=(-o "$owner" -r "$repo" -c "$charts_repo_url" --pages-branch "$pages_branch")
if [[ -n "$config" ]]; then
args+=(--config "$config")
fi
echo "The activity: $activity"
# https://stackoverflow.com/questions/64270867/auth-error-trying-to-copy-a-repo-with-github-actions
if [[ "$activity" = "pr" ]]; then
args+=("--pr")
elif [[ "$activity" = "push" ]]; then
args+=("--push")
fi

echo 'Updating charts repo index...'
echo "The parameters below: ${args[@]}"
cr index "${args[@]}"
}

main "$@"

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