fix: add conditions for empty LABELS (#10)

.github/workflows/e2e.yaml

@@ -63,3 +63,42 @@ jobs:
           REPO: ${{ github.repository }}
           PR_NUMBER: ${{ github.event.number }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  e2e-no-labels:
+    runs-on: ubuntu-20.04
+    needs: e2e-default
+
+    permissions:
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Test Run
+        id: test-run
+        uses: ./
+        with:
+          github_pr_title: "fix: esli b mishki bili b pchelami"
+
+      - name: Get labels
+        id: get-labels
+        run: ./src/labels/get.sh
+        env:
+          REPO: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.number }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Assert placeholder
+        uses: nick-fields/assert-action@v2
+        with:
+          actual: ${{ steps.get-labels.outputs.labels }}
+          expected: |
+            type/fix
+
+      - name: Delete all labels
+        run: ./src/labels/delete_all.sh
+        env:
+          REPO: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.number }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

action.yaml

@@ -41,6 +41,7 @@ runs:
     - name: Add labels
       shell: bash
       run: ${{ github.action_path }}/src/labels/add_multiple.sh
+      if: ${{ steps.construct_labels.outputs.labels_to_add != '' }}
       env:
         LABELS: ${{ steps.construct_labels.outputs.labels_to_add }}
         REPO: ${{ inputs.github_owner }}/${{ inputs.github_repo }}
@@ -50,6 +51,7 @@ runs:
     - name: Delete labels
       shell: bash
       run: ${{ github.action_path }}/src/labels/delete_multiple.sh
+      if: ${{ steps.construct_labels.outputs.labels_to_delete != '' }}
       env:
         LABELS: ${{ steps.construct_labels.outputs.labels_to_delete }}
         PR_NUMBER: ${{ inputs.github_pr_number }}

src/construct_labels.sh

@@ -5,7 +5,7 @@ set -euo pipefail
 # shellcheck source=src/common.sh
 source "$(dirname "${BASH_SOURCE[0]}")/common.sh"
 
-CURRENT_LABELS=${CURRENT_LABELS}
+CURRENT_LABELS="${CURRENT_LABELS:-""}"
 PR_TITLE=${PR_TITLE}
 
 CONFIG_JSON="https://raw.githubusercontent.com/datalens-tech/datalens/main/.github/workflows/scripts/changelog/changelog_config.json"
@@ -14,7 +14,9 @@ CONFIG_DATA=$(curl -s "$CONFIG_JSON")
 TYPE_LABELS_PREFIX=$(echo "$CONFIG_DATA" | jq -r '.section_tags.prefix')
 COMPONENT_LABELS_PREFIX=$(echo "$CONFIG_DATA" | jq -r '.component_tags.prefix')
 
-CURRENT_LABELS=$(echo "${CURRENT_LABELS}" | grep -E "$TYPE_LABELS_PREFIX|$COMPONENT_LABELS_PREFIX" | sort)
+if [[ -n $CURRENT_LABELS ]]; then
+    CURRENT_LABELS=$(echo "$CURRENT_LABELS" | grep -E "$TYPE_LABELS_PREFIX|$COMPONENT_LABELS_PREFIX" | sort)
+fi
 
 LABELS_SECTION=${PR_TITLE%%:*}
 COMMIT_TYPE=${LABELS_SECTION%%\(*}