Add warn-on-failure

Some users might not want their workflow jobs to die just because an
artifact isn't available...

.github/workflows/test.yml

@@ -118,6 +118,29 @@ jobs:
         path: single/directory
         merge-multiple: true
 
+    - name: Request missing Artifact
+      id: request-missing-artifact
+      uses: ./
+      with:
+        name: nonexistent
+        warn-on-failure: true
+
+    - name: Check missing warning
+      env:
+        output: ${{ steps.request-missing-artifact.outputs.failure }}
+      if: ${{ !contains(env.output, 'Unable to download artifact(s):') }}
+      run: |
+        false
+      shell: bash
+
+    - name: Log missing warning
+      env:
+        output: ${{ steps.request-missing-artifact.outputs.failure }}
+        run_os: ${{ matrix.runs-on }}
+      run: |
+        echo "::notice title=This message is expected::[$run_os] $output"
+      shell: bash
+
     - name: Verify successful download
       run: |
         $fileA = "single/directory/file-A.txt"

README.md

@@ -82,6 +82,10 @@ For assistance with breaking changes, see [MIGRATION.md](docs/MIGRATION.md).
     # If github-token is specified, this is the run that artifacts will be downloaded from.
     # Optional. Default is ${{ github.run_id }}
     run-id:
+
+    # Map failure result to an output instead of failing the job.
+    # Optional. Default is `false`
+    warn-on-failure:
 ```
 
 ### Outputs
@@ -89,6 +93,7 @@ For assistance with breaking changes, see [MIGRATION.md](docs/MIGRATION.md).
 | Name | Description | Example |
 | - | - | - |
 | `download-path` | Absolute path where the artifact(s) were downloaded | `/tmp/my/download/path` |
+| `failure` | Failure message (if using `warn-on-failure`) | `Unable to download artifact(s): ...` |
 
 ## Examples
 

action.yml

@@ -32,9 +32,15 @@ inputs:
       If github-token is specified, this is the run that artifacts will be downloaded from.'
     required: false
     default: ${{ github.run_id }}
+  warn-on-failure:
+    description: 'Map failure result to an output instead of failing the job'
+    required: false
+    default: false
 outputs:
   download-path:
     description: 'Path of artifact download'
+  failure:
+    description: 'Failure message (if warn-on-failure is set)'
 runs:
   using: 'node20'
   main: 'dist/index.js'

dist/index.js

@@ -121005,6 +121005,7 @@ var Inputs;
     Inputs["RunID"] = "run-id";
     Inputs["Pattern"] = "pattern";
     Inputs["MergeMultiple"] = "merge-multiple";
+    Inputs["WarnOnFailure"] = "warn-on-failure";
 })(Inputs || (exports.Inputs = Inputs = {}));
 var Outputs;
 (function (Outputs) {
@@ -121069,7 +121070,7 @@ const chunk = (arr, n) => arr.reduce((acc, cur, i) => {
     return acc;
 }, []);
 exports.chunk = chunk;
-function run() {
+function run(flags) {
     return __awaiter(this, void 0, void 0, function* () {
         const inputs = {
             name: core.getInput(constants_1.Inputs.Name, { required: false }),
@@ -121078,8 +121079,12 @@ function run() {
             repository: core.getInput(constants_1.Inputs.Repository, { required: false }),
             runID: parseInt(core.getInput(constants_1.Inputs.RunID, { required: false })),
             pattern: core.getInput(constants_1.Inputs.Pattern, { required: false }),
-            mergeMultiple: core.getBooleanInput(constants_1.Inputs.MergeMultiple, { required: false })
+            mergeMultiple: core.getBooleanInput(constants_1.Inputs.MergeMultiple, {
+                required: false
+            }),
+            warnOnFailure: core.getBooleanInput(constants_1.Inputs.WarnOnFailure, { required: false })
         };
+        flags.warnOnFailure = inputs.warnOnFailure;
         if (!inputs.path) {
             inputs.path = process.env['GITHUB_WORKSPACE'] || process.cwd();
         }
@@ -121147,7 +121152,17 @@ function run() {
         core.info('Download artifact has finished successfully');
     });
 }
-run().catch(err => core.setFailed(`Unable to download artifact(s): ${err.message}`));
+{
+    const flags = { warnOnFailure: false };
+    run(flags).catch(err => {
+        if (flags.warnOnFailure) {
+            core.setOutput('failure', `Unable to download artifact(s): ${err.message}`);
+        }
+        else {
+            core.setFailed(`Unable to download artifact(s): ${err.message}`);
+        }
+    });
+}
 
 
 /***/ }),

src/constants.ts

@@ -5,7 +5,8 @@ export enum Inputs {
   Repository = 'repository',
   RunID = 'run-id',
   Pattern = 'pattern',
-  MergeMultiple = 'merge-multiple'
+  MergeMultiple = 'merge-multiple',
+  WarnOnFailure = 'warn-on-failure'
 }
 
 export enum Outputs {

src/download-artifact.ts

@@ -8,6 +8,10 @@ import {Inputs, Outputs} from './constants'
 
 const PARALLEL_DOWNLOADS = 5
 
+interface Flags {
+  warnOnFailure: boolean
+}
+
 export const chunk = <T>(arr: T[], n: number): T[][] =>
   arr.reduce((acc, cur, i) => {
     const index = Math.floor(i / n)
@@ -15,7 +19,7 @@ export const chunk = <T>(arr: T[], n: number): T[][] =>
     return acc
   }, [] as T[][])
 
-async function run(): Promise<void> {
+async function run(flags: Flags): Promise<void> {
   const inputs = {
     name: core.getInput(Inputs.Name, {required: false}),
     path: core.getInput(Inputs.Path, {required: false}),
@@ -23,8 +27,12 @@ async function run(): Promise<void> {
     repository: core.getInput(Inputs.Repository, {required: false}),
     runID: parseInt(core.getInput(Inputs.RunID, {required: false})),
     pattern: core.getInput(Inputs.Pattern, {required: false}),
-    mergeMultiple: core.getBooleanInput(Inputs.MergeMultiple, {required: false})
+    mergeMultiple: core.getBooleanInput(Inputs.MergeMultiple, {
+      required: false
+    }),
+    warnOnFailure: core.getBooleanInput(Inputs.WarnOnFailure, {required: false})
   }
+  flags.warnOnFailure = inputs.warnOnFailure
 
   if (!inputs.path) {
     inputs.path = process.env['GITHUB_WORKSPACE'] || process.cwd()
@@ -131,6 +139,16 @@ async function run(): Promise<void> {
   core.info('Download artifact has finished successfully')
 }
 
-run().catch(err =>
+{
-  core.setFailed(`Unable to download artifact(s): ${err.message}`)
+  const flags = {warnOnFailure: false}
-)
+  run(flags).catch(err => {
+    if (flags.warnOnFailure) {
+      core.setOutput(
+        'failure',
+        `Unable to download artifact(s): ${err.message}`
+      )
+    } else {
+      core.setFailed(`Unable to download artifact(s): ${err.message}`)
+    }
+  })
+}