Initial commit

LICENSE

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+Copyright 2021 albelli BV
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# SparseCheckout-Action
+
+A GitHub Action to perform a [sparse checkout with git](https://git-scm.com/docs/git-sparse-checkout).
+
+## Usage
+```
+  - uses: albumprinter/SparseCheckout-Action@v1
+    with:
+      paths: config src/core tests/unit
+```

action.yml

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+# Sparse checkout: https://github.com/actions/checkout/issues/172
+# actions/checkout@v2 does not support sparse checkout as of Oct 2021
+
+name: Sparse checkout
+inputs:
+  token:
+    description: 'GitHub token'
+    default: ${{ github.token }}
+
+  paths:
+    description: 'Paths to add to the sparse checkout'
+    required: true
+    type: string # There is no type "list" in Github Actions as of Oct 2021
+
+runs:
+  using: composite
+  steps:
+    - name: Perform sparse checkout
+      shell: bash
+      run: |
+        REPO="https://${GITHUB_ACTOR}:${{ inputs.token }}@github.com/${GITHUB_REPOSITORY}.git"
+        # For a partial checkout we need a branch name (like issue/APP-XXXX)
+        # Now, follow the hands:
+        #   GITHUB_HEAD_REF is defined only for pull_request triggers and it's a branch name
+        #   GITHUB_REF is defined only for branch push triggers and it's a ref (ref/heads/issue/APP-XXXX)
+        PR_BRANCH=${GITHUB_HEAD_REF}
+        PUSH_BRANCH=${GITHUB_REF#refs/heads/}
+        BRANCH="${PR_BRANCH:-${PUSH_BRANCH}}" # Pick one of the two
+
+        git clone --filter=blob:none --no-checkout --depth 1 --single-branch -b "$BRANCH" --sparse "$REPO" .
+        git sparse-checkout init --cone
+        git sparse-checkout add ${{ inputs.paths }}
+        git checkout