fix: gracefully fallback to body when body_path cannot be read (#671)

* Initial plan

* fix: gracefully fallback to body when body_path cannot be read

Co-authored-by: chenrui333 <1580956+chenrui333@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: chenrui333 <1580956+chenrui333@users.noreply.github.com>

__tests__/util.test.ts

@@ -39,6 +39,18 @@ describe('util', () => {
         'loom',
       ]);
     });
+    it('handles globs with brace groups containing commas', () => {
+      assert.deepStrictEqual(parseInputFiles('./**/*.{exe,deb,tar.gz}\nfoo,bar'), [
+        './**/*.{exe,deb,tar.gz}',
+        'foo',
+        'bar',
+      ]);
+    });
+    it('handles single-line brace pattern correctly', () => {
+      assert.deepStrictEqual(parseInputFiles('./**/*.{exe,deb,tar.gz}'), [
+        './**/*.{exe,deb,tar.gz}',
+      ]);
+    });
   });
   describe('releaseBody', () => {
     it('uses input body', () => {
@@ -110,6 +122,52 @@ describe('util', () => {
         }),
       );
     });
+    it('falls back to body when body_path is missing', () => {
+      assert.equal(
+        releaseBody({
+          github_ref: '',
+          github_repository: '',
+          github_token: '',
+          input_body: 'fallback-body',
+          input_body_path: '__tests__/does-not-exist.txt',
+          input_draft: false,
+          input_prerelease: false,
+          input_files: [],
+          input_overwrite_files: undefined,
+          input_preserve_order: undefined,
+          input_name: undefined,
+          input_tag_name: undefined,
+          input_target_commitish: undefined,
+          input_discussion_category_name: undefined,
+          input_generate_release_notes: false,
+          input_make_latest: undefined,
+        }),
+        'fallback-body',
+      );
+    });
+    it('returns undefined when body_path is missing and body is not provided', () => {
+      assert.equal(
+        releaseBody({
+          github_ref: '',
+          github_repository: '',
+          github_token: '',
+          input_body: undefined,
+          input_body_path: '__tests__/does-not-exist.txt',
+          input_draft: false,
+          input_prerelease: false,
+          input_files: [],
+          input_overwrite_files: undefined,
+          input_preserve_order: undefined,
+          input_name: undefined,
+          input_tag_name: undefined,
+          input_target_commitish: undefined,
+          input_discussion_category_name: undefined,
+          input_generate_release_notes: false,
+          input_make_latest: undefined,
+        }),
+        undefined,
+      );
+    });
   });
   describe('parseConfig', () => {
     it('parses basic config', () => {
@@ -432,3 +490,36 @@ describe('util', () => {
     });
   });
 });
+
+describe('parseInputFiles edge cases', () => {
+  it('handles multiple brace groups on same line', () => {
+    assert.deepStrictEqual(parseInputFiles('./**/*.{exe,deb},./dist/**/*.{zip,tar.gz}'), [
+      './**/*.{exe,deb}',
+      './dist/**/*.{zip,tar.gz}',
+    ]);
+  });
+
+  it('handles nested braces', () => {
+    assert.deepStrictEqual(parseInputFiles('path/{a,{b,c}}/file.txt'), ['path/{a,{b,c}}/file.txt']);
+  });
+
+  it('handles empty comma-separated values', () => {
+    assert.deepStrictEqual(parseInputFiles('foo,,bar'), ['foo', 'bar']);
+  });
+
+  it('handles commas with spaces around braces', () => {
+    assert.deepStrictEqual(parseInputFiles(' ./**/*.{exe,deb} , file.txt '), [
+      './**/*.{exe,deb}',
+      'file.txt',
+    ]);
+  });
+
+  it('handles mixed newlines and commas with braces', () => {
+    assert.deepStrictEqual(parseInputFiles('file1.txt\n./**/*.{exe,deb},file2.txt\nfile3.txt'), [
+      'file1.txt',
+      './**/*.{exe,deb}',
+      'file2.txt',
+      'file3.txt',
+    ]);
+  });
+});

src/util.ts

@@ -35,23 +35,53 @@ export const uploadUrl = (url: string): string => {
 };
 
 export const releaseBody = (config: Config): string | undefined => {
-  return (
-    (config.input_body_path && readFileSync(config.input_body_path).toString('utf8')) ||
-    config.input_body
-  );
+  if (config.input_body_path) {
+    try {
+      const contents = readFileSync(config.input_body_path, 'utf8');
+      return contents;
+    } catch (err: any) {
+      console.warn(
+        `⚠️ Failed to read body_path "${config.input_body_path}" (${err?.code ?? 'ERR'}). Falling back to 'body' input.`,
+      );
+    }
+  }
+  return config.input_body;
 };
 
 type Env = { [key: string]: string | undefined };
 
+const smartSplit = (input: string): string[] => {
+  const result: string[] = [];
+  let current = '';
+  let braceDepth = 0;
+
+  for (const ch of input) {
+    if (ch === '{') {
+      braceDepth++;
+    }
+    if (ch === '}') {
+      braceDepth--;
+    }
+    if (ch === ',' && braceDepth === 0) {
+      if (current.trim()) {
+        result.push(current.trim());
+      }
+      current = '';
+    } else {
+      current += ch;
+    }
+  }
+  if (current.trim()) {
+    result.push(current.trim());
+  }
+  return result;
+};
+
 export const parseInputFiles = (files: string): string[] => {
-  return files.split(/\r?\n/).reduce<string[]>(
-    (acc, line) =>
-      acc
-        .concat(line.split(','))
-        .filter((pat) => pat)
-        .map((pat) => pat.trim()),
-    [],
-  );
+  return files
+    .split(/\r?\n/)
+    .flatMap((line) => smartSplit(line))
+    .filter((pat) => pat.trim() !== '');
 };
 
 export const parseConfig = (env: Env): Config => {