feat: use dockerhub image #1 (#3)

* add shellscript

* change image

* update readme

README.md

@@ -82,20 +82,36 @@ jobs:
 
 ## Example projects
 
-* https://github.com/jiro4989/nimjson
+* <https://github.com/jiro4989/nimjson>
 
 ## Development
 
+### Flow
+
+1. Create a new branch
+1. Commit
+1. Merge the branch into `develop` branch
+1. Push `develop` branch
+1. Check passing all tests
+1. Create a new pull request
+1. Merge the branch into `master` branch
+
+This actions is using a DockerHub image.  We must push `docker-v0.0.0` git-tag
+to create a new tagged docker image.  Published a new tagged docker image, and
+change tag of action.yml into `develop` branch, and check passing all tests,
+and merge into `master`.
+
 ### Release
 
 #### [haya14busa/action-bumpr](https://github.com/haya14busa/action-bumpr)
+
 You can bump version on merging Pull Requests with specific labels (bump:major,bump:minor,bump:patch).
 Pushing tag manually by yourself also work.
 
 #### [haya14busa/action-update-semver](https://github.com/haya14busa/action-update-semver)
 
 This action updates major/minor release tags on a tag push. e.g. Update v1 and v1.2 tag when released v1.2.3.
-ref: https://help.github.com/en/articles/about-actions#versioning-your-action
+ref: <https://help.github.com/en/articles/about-actions#versioning-your-action>
 
 ### Lint - reviewdog integration
 
@@ -106,7 +122,7 @@ which is useful for Docker container based actions.
 
 Supported linters:
 
-- [reviewdog/action-shellcheck](https://github.com/reviewdog/action-shellcheck)
-- [reviewdog/action-hadolint](https://github.com/reviewdog/action-hadolint)
-- [reviewdog/action-misspell](https://github.com/reviewdog/action-misspell)
+* [reviewdog/action-shellcheck](https://github.com/reviewdog/action-shellcheck)
+* [reviewdog/action-hadolint](https://github.com/reviewdog/action-hadolint)
+* [reviewdog/action-misspell](https://github.com/reviewdog/action-misspell)
 

action.yml

@@ -31,7 +31,7 @@ inputs:
     default: 'MIT'
 runs:
   using: 'docker'
-  image: 'Dockerfile'
+  image: 'docker://jiro4989/build-rpm-action:2.1.0'
 
 # Ref: https://haya14busa.github.io/github-action-brandings/
 # TODO: update branding if you want.

dockertag.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -eu
+
+readonly VERSION=$1
+
+readonly BOLD=$'\x1b[1m'
+readonly GREEN=$'\x1b[32m'
+readonly RED=$'\x1b[31m'
+readonly RESET=$'\x1b[m'
+
+now() {
+  date "+%Y/%m/%d %H:%M:%S"
+}
+
+info() {
+  echo -e "[$(now)] ${GREEN}INFO${RESET}: $*"
+}
+
+err() {
+  echo -e "[$(now)]  ${RED}ERR${RESET}: $*"
+}
+
+if [[ ! "$VERSION" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  err "tag version (VERSION = $VERSION) is illegal. tag format must be 'v0.0.0'."
+  exit 1
+fi
+
+readonly TAG="docker-$VERSION"
+info "TAG = $TAG"
+git tag "$TAG"
+git push origin "$TAG"
+echo ""
+info "tagging successfully."
+info "see ${BOLD}https://hub.docker.com/r/jiro4989/build-deb-action${RESET} ."