Add commit_sha output (actions#275)

* feat: add commit_sha output

* docs(README): add docs for commit_sha

README.md

@@ -130,6 +130,7 @@ If you're getting this error and you're using `actions/checkout@v1`, try upgradi
 The action provides these outputs:
 
 - `committed`: whether the action has created a commit (`'true'` or `'false'`)
+- `commit_sha`: the short 7-digit sha of the commit that has just been created
 - `pushed`: whether the action has pushed to the remote (`'true'` or `'false'`)
 - `tagged`: whether the action has created a tag (`'true'` or `'false'`)
 
@@ -164,7 +165,6 @@ You can also use the `committer_name` and `committer_email` inputs to make it ap
     committer_email: actions@github.com
 ```
 
-
 <img src="https://user-images.githubusercontent.com/26386270/130594443-b881fae7-3064-4020-a4cc-6db37ef0df65.png" height=70/>
 
 ```yaml
@@ -175,7 +175,6 @@ You can also use the `committer_name` and `committer_email` inputs to make it ap
     committer_email: 41898282+github-actions[bot]@users.noreply.github.com
 ```
 
-
 Do you want to lint your JavaScript files, located in the `src` folder, with ESLint, so that fixable changes are done without your intervention? You can use a workflow like this:
 
 ```yaml
@@ -238,8 +237,6 @@ jobs:
           cwd: './pathToRepo/'
 ```
 
-
-
 ## Contributors ✨
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):

action.yml

@@ -59,6 +59,8 @@ inputs:
 outputs:
   committed:
     description: Whether the action has created a commit.
+  commit_sha:
+    description: The SHA of the commit that has been created.
   pushed:
     description: Whether the action has pushed to the remote.
   tagged:

src/main.ts

@@ -1,6 +1,6 @@
 import * as core from '@actions/core'
 import path from 'path'
-import simpleGit, { Response } from 'simple-git'
+import simpleGit, { CommitSummary, Response } from 'simple-git'
 import YAML from 'js-yaml'
 import {
   getInput,
@@ -85,8 +85,11 @@ core.info(`Running in ${baseDir}`)
             }
           : {})
       },
-      (err, data?) => {
-        if (data) setOutput('committed', 'true')
+      (err, data?: CommitSummary) => {
+        if (data) {
+          setOutput('committed', 'true')
+          setOutput('commit_sha', data.commit)
+        }
         return log(err, data)
       }
     )

src/util.ts

@@ -20,7 +20,7 @@ export type Input =
   | 'tag'
   | 'github_token'
 
-export type Output = 'committed' | 'pushed' | 'tagged'
+export type Output = 'committed' | 'commit_sha' | 'pushed' | 'tagged'
 
 type RecordOf<T extends string> = Record<T, string | undefined>
 export const tools = new Toolkit<RecordOf<Input>, RecordOf<Output>>({
@@ -31,8 +31,9 @@ export const tools = new Toolkit<RecordOf<Input>, RecordOf<Output>>({
     'GITHUB_ACTOR'
   ]
 })
-export const outputs: Record<Output, 'true' | 'false'> = {
+export const outputs: Record<Output, any> = {
   committed: 'false',
+  commit_sha: undefined,
   pushed: 'false',
   tagged: 'false'
 }