Add regexp filter for artifact name (#237)

Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>

.github/workflows/download.yml

@@ -88,6 +88,24 @@ jobs:
           cat artifact/sha | grep $GITHUB_SHA
           cat artifact1/sha1 | grep $GITHUB_SHA
           cat artifact2/sha2 | grep $GITHUB_SHA
+  download-regexp:
+    runs-on: ubuntu-latest
+    needs: wait
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Download
+        uses: ./
+        with:
+          workflow: upload.yml
+          name: artifact.
+          name_is_regexp: true
+      - name: Test
+        run: |
+          cat artifact1/sha1 | grep $GITHUB_SHA
+          cat artifact2/sha2 | grep $GITHUB_SHA
+          ! test -d artifact/artifact
+          ! test -f artifact.zip
   download-empty-conclusion:
     runs-on: ubuntu-latest
     needs: wait
@@ -185,3 +203,23 @@ jobs:
           search_artifacts: true
       - name: Test
         run: cat artifact/sha | grep $GITHUB_SHA
+  download-regexp-with-search-artifacts:
+    runs-on: ubuntu-latest
+    needs: wait
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Download
+        uses: ./
+        with:
+          workflow: upload.yml
+          name: artifact.
+          name_is_regexp: true
+          path: artifact
+          search_artifacts: true
+      - name: Test
+        run: |
+          cat artifact/artifact1/sha1 | grep $GITHUB_SHA
+          cat artifact/artifact2/sha2 | grep $GITHUB_SHA
+          ! test -d artifact/artifact/artifact
+          ! test -f artifact/artifact.zip

README.md

@@ -47,15 +47,20 @@ Let's suppose you have a workflow with a job in it that at the end uploads an ar
     # will download all artifacts if not specified
     # and extract them into respective subdirectories
     # https://github.com/actions/download-artifact#download-all-artifacts
+    # is treated as a regular expression if input name_is_regexp is true
+    # will download only those artifacts with a name that matches this regular expression
+    # https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions
     name: artifact_name
+    # Optional, name is treated as a regular expression if set true
+    name_is_regexp: true
     # Optional, a directory where to extract artifact(s), defaults to the current directory
     path: extract_here
     # Optional, defaults to current repo
     repo: ${{ github.repository }}
     # Optional, check the workflow run to whether it has an artifact
     # then will get the last available artifact from the previous workflow
     # default false, just try to download from the last one
-    check_artifacts:  false
+    check_artifacts: false
     # Optional, search for the last workflow run whose stored an artifact named as in `name` input
     # default false
     search_artifacts: false

action.yml

@@ -47,6 +47,10 @@ inputs:
   name:
     description: Artifact name (download all artifacts if not specified)
     required: false
+  name_is_regexp:
+    description: Treat artifact name as a regular expression and download only artifacts with matching names
+    required: false
+    default: false
   path:
     description: Where to unpack the artifact
     required: false

main.js

@@ -25,6 +25,7 @@ async function main() {
         const [owner, repo] = core.getInput("repo", { required: true }).split("/")
         const path = core.getInput("path", { required: true })
         const name = core.getInput("name")
+        const nameIsRegExp = core.getBooleanInput("name_is_regexp")
         const skipUnpack = core.getBooleanInput("skip_unpack")
         const ifNoArtifactFound = core.getInput("if_no_artifact_found")
         let workflow = core.getInput("workflow")
@@ -130,6 +131,9 @@ async function main() {
                         }
                         if (searchArtifacts) {
                             const artifact = artifacts.find((artifact) => {
+                                if (nameIsRegExp) {
+                                    return artifact.name.match(name) !== null
+                                }
                                 return artifact.name == name
                             })
                             if (!artifact) {
@@ -166,9 +170,12 @@ async function main() {
             run_id: runID,
         })
 
-        // One artifact or all if `name` input is not specified.
+        // One artifact if 'name' input is specified, one or more if `name` is a regular expression, all otherwise.
         if (name) {
             filtered = artifacts.filter((artifact) => {
+                if (nameIsRegExp) {
+                    return artifact.name.match(name) !== null
+                }
                 return artifact.name == name
             })
             if (filtered.length == 0) {
@@ -238,7 +245,7 @@ async function main() {
                 continue
             }
 
-            const dir = name ? path : pathname.join(path, artifact.name)
+            const dir = name && !nameIsRegExp ? path : pathname.join(path, artifact.name)
 
             fs.mkdirSync(dir, { recursive: true })