Default asset_name to the original file name (fixes #4)

README.md

@@ -9,11 +9,12 @@ You must provide:
 
 - `repo_token`: Usually you'll want to set this to `${{ secrets.GITHUB_TOKEN }}`.
 - `file`: A local file to be uploaded as the asset.
-- `asset_name`: The name the file gets as an asset on a release. Use `$tag` to include the tag name.
 - `tag`: The tag to upload into. If you want the current event's tag, use `${{ github.ref }}` (the `refs/tags/` prefix will be automatically stripped).
 
 Optional Arguments
 
+- `asset_name`: The name the file gets as an asset on a release. Use `$tag` to include the tag name. When not provided it will default to the filename.
+                This is not used if `file_glob` is set to `true`.
 - `file_glob`: If set to true, the file argument can be a glob pattern (`asset_name` is ignored in this case) (Default: `false`)
 - `overwrite`: If an asset with the same name already exists, overwrite it (Default: `false`).
 - `prerelease`: Mark the release as a pre-release (Default: `false`).

action.yml

@@ -6,25 +6,24 @@ branding:
   color: orange
 inputs:
   repo_token:
-    description: 'GitHub token'
+    description: 'GitHub token.'
     required: true
   file:
-    description: 'Local file to upload'
+    description: 'Local file to upload.'
-    required: true
-  asset_name:
-    description: 'Name of the asset'
     required: true
   tag:
-    description: 'Tag to use as a release'
+    description: 'Tag to use as a release.'
     required: true
+  asset_name:
+    description: 'Name of the asset. When not provided will use the file name. Unused if file_glob is set to "true".'
   overwrite:
-    description: 'Overwrite the release in case it already exists'
+    description: 'Overwrite the release in case it already exists.'
   file_glob:
-    description: 'If true the file can be a glob pattern, asset_name is ignored if this is true'
+    description: 'If true the file can be a glob pattern, asset_name is ignored if this is true.'
   prerelease:
-    description: 'Mark the release as a pre-release'
+    description: 'Mark the release as a pre-release.'
   body:
-    description: 'Content of the release text'
+    description: 'Content of the release text.'
 outputs:
   browser_download_url:
     description: 'The publicly available URL of the asset.'

dist/index.js

@@ -2284,9 +2284,9 @@ function run() {
                 }
             }
             else {
-                const asset_name = core
+                const asset_name = core.getInput('asset_name') !== ''
-                    .getInput('asset_name', { required: true })
+                    ? core.getInput('asset_name').replace(/\$tag/g, tag)
-                    .replace(/\$tag/g, tag);
+                    : path.basename(file);
                 const asset_download_url = yield upload_to_release(release, file, asset_name, tag, overwrite, octokit);
                 core.setOutput('browser_download_url', asset_download_url);
             }

src/main.ts

@@ -131,9 +131,10 @@ async function run(): Promise<void> {
         core.setFailed('No files matching the glob pattern found.')
       }
     } else {
-      const asset_name = core
+      const asset_name =
-        .getInput('asset_name', {required: true})
+        core.getInput('asset_name') !== ''
-        .replace(/\$tag/g, tag)
+          ? core.getInput('asset_name').replace(/\$tag/g, tag)
+          : path.basename(file)
       const asset_download_url = await upload_to_release(
         release,
         file,