feat: Introduce filterFiles argument

Author: s0

.changeset/light-days-fry.md

@@ -0,0 +1,8 @@
+---
+"@changesets/ghcommit": minor
+---
+
+Introduce `filterFiles` argument for `commitChangesFromRepo`
+
+Allow for a custom function to be specified to filter which files should be
+included in the commit

src/git.ts

@@ -21,6 +21,7 @@ export const commitChangesFromRepo = async ({
   base,
   repoDirectory,
   addFromDirectory,
+  filterFiles,
   log,
   ...otherArgs
 }: CommitChangesFromRepoArgs): Promise<CommitFilesResult> => {
@@ -91,6 +92,10 @@ export const commitChangesFromRepo = async ({
         // Iterate through these directories
         return true;
       }
+      if (filterFiles && !filterFiles(filepath)) {
+        // Ignore out files that don't match any specified filter
+        return null;
+      }
       if (!workdir) {
         // File was deleted
         deletions.push(filepath);

src/interface.ts

@@ -120,4 +120,11 @@ export interface CommitChangesFromRepoArgs extends CommitFilesBasedArgs {
    * which will add all changed files in the repository.
    */
   addFromDirectory?: string;
+  /**
+   * An optional function that can be used to filter which files are included
+   * in the commit. True should be returned for files that should be included.
+   *
+   * By default, all files are included.
+   */
+  filterFiles?: (file: string) => boolean;
 }