feat: support multiple config files (#106)

* Allow config-file to be a list of local or remote files

* Update README.md

* Update description in actions.yml

README.md

@@ -17,10 +17,14 @@ jobs:
     steps:
       - uses: EndBug/label-sync@v2
         with:
-          # If you want to use a config file, you can put its path or URL here (more info in the paragraphs below)
-          config-file:
+          # If you want to use a config file, you can put its path or URL here, multiple files are also allowed (more info in the paragraphs below)
+          config-file: .github/labels.yml
+          # as URL:
+          config-file: https://raw.githubusercontent.com/EndBug/label-sync/main/.github/labels.yml
+          # as multiple:
+          config-file: |
+            https://raw.githubusercontent.com/EndBug/label-sync/main/.github/labels.yml
             .github/labels.yml
-            # If URL: "https://raw.githubusercontent.com/EndBug/label-sync/main/.github/labels.yml"
 
           # If you want to use a source repo, you can put is name here (only the owner/repo format is accepted)
           source-repo: owner/repo
@@ -105,6 +109,16 @@ You can use the "raw" link that GitHub provides for the file:
     config-file: 'https://raw.githubusercontent.com/EndBug/label-sync/main/.github/labels.yml'
 ```
 
+You can also specify several config files (e.g. sync a set of "global" labels as well as a set of "local" labels):
+
+```yaml
+- uses: EndBug/label-sync@v2
+  with:
+    config-file: |
+        https://raw.githubusercontent.com/EndBug/label-sync/main/.github/labels.yml
+        .github/labels.yml
+```
+
 This is different than using the `source-repo` option, since this also allows you to use aliases, if the config file has any. If you use the `source-repo` option the action will only copy over the missing labels and update colors, wihtout updating or deleting anything else.
 
 If the URL you're using needs an `Authorization` header (like if, for example, you're fetching it from a private repo), you can put its value in the `request-token` input:

action.yml

@@ -13,7 +13,7 @@ inputs:
     default: ${{ github.token }}
 
   config-file:
-    description: The path (or URL) to the JSON or YAML file containing the label config (more info in the README)
+    description: The path(s) (and/or URL(s)) to the JSON or YAML file containing the label config (more info in the README)
     required: false
   source-repo:
     description: The repo to copy labels from (if not using a config file), in the 'owner/repo' format

src/index.ts

@@ -18,19 +18,20 @@ const log = {
   fatal: (str: string) => core.setFailed('✗ ' + str)
 }
 
-type ConfigSource = 'local' | 'remote' | 'repo'
-let configSource!: ConfigSource
+let configSource!: 'list' | 'repo'
 ;(async () => {
   try {
     checkInputs()
 
     let labels: LabelInfo[]
     switch (configSource) {
-      case 'local':
-        labels = readConfigFile(getInput('config-file'))
-        break
-      case 'remote':
-        labels = await readRemoteConfigFile(getInput('config-file'))
+      case 'list':
+        labels = []
+        for (const cf of getInput('config-file').split('\n')) {
+          console.log(cf)
+          if (isURL(cf)) labels.push(...(await readRemoteConfigFile(cf)))
+          else labels.push(...readConfigFile(cf))
+        }
         break
       case 'repo':
         labels = await fetchRepoLabels(
@@ -236,11 +237,19 @@ function checkInputs() {
   if (!!configFile && !!sourceRepo)
     throw "You can't use a config file and a source repo at the same time. Choose one!"
 
-  if (configFile) configSource = isURL(configFile) ? 'remote' : 'local'
-  else if (sourceRepo) configSource = 'repo'
-  else throw 'You have to either use a config file or a source repo.'
+  const sources: ('remote' | 'local')[] = []
+  if (sourceRepo) configSource = 'repo'
+  else if (configFile) {
+    configSource = 'list'
+    for (const cf of configFile.split('\n')) {
+      if (isURL(cf)) sources.push('remote')
+      else sources.push('local')
+    }
+  } else throw 'You have to either use a config file or a source repo.'
 
-  log.info(`Current config mode: ${configSource}`)
+  log.info(
+    `Current config mode: ${sources ? sources.join(', ') : configSource}`
+  )
 
   if (sourceRepo && sourceRepo.split('/').length != 2)
     throw 'Source repo should be in the owner/repo format, like EndBug/label-sync!'