first commit

README.md

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+# checkout@v1

action.yaml

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+name: checkout
+inputs:
+  token:
+    description: A token to authenticate on behalf of the GitHub App installed on your repository.
+    default: ${{ gitea.token }}
+
+runs:
+  using: composite
+  steps:
+    - name: Checkout
+      run: ${{ gitea.action_path }}/checkout.sh
+      env:
+        ACTION_REPOSITORY: ${{ gitea.repository }}
+        ACTION_REPOSITORY_OWNER: ${{ gitea.repository_owner }}
+        ACTION_SERVER_URL: ${{ gitea.server_url }}
+        ACTION_SHA: ${{ gitea.sha }}
+        ACTION_TOKEN: ${{ inputs.token }}

checkout.sh

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+#!/bin/bash -e
+
+URL="${ACTION_SERVER_URL/\/\//\/\/$ACTION_REPOSITORY_OWNER:$ACTION_TOKEN@}/$ACTION_REPOSITORY"
+
+git init -b main
+git remote add origin "$URL"
+git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin "$ACTION_SHA"
+git checkout --progress --force -B main "$ACTION_SHA"