Add GitHub Enterprise support (ad-m#106)

* Add GitHub url and GitHub Enterprise support

* Add review improvements

* Modify the default value to github.server_url

Author: Pascal Zimmermann

README.md

@@ -7,6 +7,7 @@ With ease:
 - update new code placed in the repository, e.g. by running a linter on it,
 - track changes in script results using Git as archive,
 - publish page using GitHub-Pages,
+- push changes to a hosted GitHub Enterprise Server instance,
 - mirror changes to a separate repository.
 
 ## Usage
@@ -44,6 +45,7 @@ jobs:
 | name | value | default | description |
 | ---- | ----- | ------- | ----------- |
 | github_token | string |  `${{ github.token }}` | [GITHUB_TOKEN](https://docs.github.com/en/free-pro-team@latest/actions/reference/authentication-in-a-workflow#using-the-github_token-in-a-workflow) <br /> or a repo scoped <br /> [Personal Access Token](https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token). |
+| github_url | string | `${{ github.server_url }}` | Specify the GitHub Enterprise or GitHub url|
 | branch | string | (default) | Destination branch to push changes. <br /> Can be passed in using `${{ github.ref }}`. |
 | force | boolean | false | Determines if force push is used. |
 | tags | boolean | false | Determines if `--tags` is used. |

action.yml

@@ -9,6 +9,10 @@ inputs:
     description: 'GitHub token or PAT token'
     required: true
     default: ${{ github.token }}
+  github_url:
+    description: 'GitHub url or GitHub Enterprise url'
+    required: true
+    default: ${{ github.server_url }}
   repository:
     description: 'Repository name to push. Default or empty value represents current github repository (${GITHUB_REPOSITORY})'
     default: ''

start.js

@@ -42,19 +42,22 @@ const trim = (value, charlist) => trimLeft(trimRight(value, charlist));
 const main = async () => {
     let branch = process.env.INPUT_BRANCH;
     const repository = trim(process.env.INPUT_REPOSITORY || process.env.GITHUB_REPOSITORY);
+    const github_url = trim(process.env.INPUT_GITHUB_URL)
     if (!branch) {
         const headers = {
             'User-Agent': 'github.com/ad-m/github-push-action'
         };
         if (process.env.INPUT_GITHUB_TOKEN) headers.Authorization = `token ${process.env.INPUT_GITHUB_TOKEN}`;
-        const body = JSON.parse(await get(`https://api.github.com/repos/${repository}`, { headers }))
+        const api_url = github_url === 'github.com' ? 'api.github.com' : github_url + '/api/v3';
+        const body = JSON.parse(await get(`https://${api_url}/repos/${repository}`, { headers }))
         branch = body.default_branch;
     }
     await exec('bash', [path.join(__dirname, './start.sh')], {
         env: {
             ...process.env,
             INPUT_BRANCH: branch,
             INPUT_REPOSITORY: repository,
+            INPUT_GITHUB_URL: github_url,
         }
     });
 };

start.sh

@@ -23,6 +23,6 @@ fi
 
 cd ${INPUT_DIRECTORY}
 
-remote_repo="https://${GITHUB_ACTOR}:${INPUT_GITHUB_TOKEN}@github.com/${REPOSITORY}.git"
+remote_repo="https://${GITHUB_ACTOR}:${INPUT_GITHUB_TOKEN}@${GITHUB_URL}/${REPOSITORY}.git"
 
 git push "${remote_repo}" HEAD:${INPUT_BRANCH} --follow-tags $_FORCE_OPTION $_TAGS;