Initial upload artifact action

.forgejo/workflows/test_workflow.yml

@@ -1,10 +1,20 @@
 on:
   push:
 jobs:
-  test:
+  checkout:
     runs-on: docker
     container:
       image: git.hswro.org/fleg/actions-experiments:latest
     steps:
       - uses: https://codeberg.org/fleg/light-actions/checkout@main
       - run: cat README.md
+  upload-artifact:
+    runs-on: docker
+    container:
+      image: git.hswro.org/fleg/actions-experiments:latest
+    steps:
+      - run: echo "test passed" > test.txt
+      - uses: https://codeberg.org/fleg/light-actions/upload-artifact@main
+        with:
+          path: test.txt
+          artifact-name: test-artifact

checkout/action.yml

@@ -1,5 +1,5 @@
 name: checkout
-description: Checkout the git repository.
+description: "Checkout the git repository."
 runs:
   using: composite
   steps:

upload-artifact/action.yml

@@ -0,0 +1,49 @@
+name: upload-artifact
+description: "Uploads an artifact. Does not compress it or anything - supports just one file."
+inputs:
+  path:
+    required: true
+    description: "Path to the file that should be uploaded"
+  artifact-name:
+    required: true
+    description: "Name of the resulting artifact"
+runs:
+  using: composite
+  steps:
+    - run: |
+        set -euxo pipefail
+        HEADERS="\
+          --header 'Accept: application/json;api-version=6.0-preview' \
+          --header "Authorization: Bearer $ACTIONS_RUNTIME_TOKEN" \
+        "
+        ARTIFACT_BASE="${ACTIONS_RUNTIME_URL}_apis/pipelines/workflows/${GITHUB_RUN_ID}/artifacts?api-version=6.0-preview"
+        RESOURCE_URL="$(
+          curl \
+            -XPOST \
+            --silent \
+            --fail-with-body \
+            "${HEADERS}" \
+            --header 'Content-Type: application/json' \
+            --data '{"type": "actions_storage", "name": "'"${{ inputs.artifact-name }}"'"}' \
+            "$ARTIFACT_BASE" | jq --exit-status --raw-output .fileContainerResourceUrl
+        )"
+
+        curl \
+          -XPUT \
+          --silent \
+          --fail-with-body \
+          "${HEADERS}" \
+          --header 'Content-Type: application/octet-stream' \
+          --header "Content-Range: bytes 0-$(echo \"$(wc -c < ${{ inputs.path }}) - 1 | wc")/$(wc -c < ${{ inputs.path }})" \
+          --data-binary "@${{ inputs.path }}" \
+          "${RESOURCE_URL}?itemPath=${{ inputs.artifact-name }}/$(basename ${{ inputs.path }})"
+
+        curl \
+          -XPATCH \
+          --silent \
+          --fail-with-body \
+          "${HEADERS}" \
+          --header 'Content-Type: application/json' \
+          --data '{"size": 11}' \
+          "${ARTIFACT_BASE}&artifactName=${{ inputs.artifact-name }}"
+      shell: sh