From ec64a3014a05dd85f01ca1e4d441692b21054e5e Mon Sep 17 00:00:00 2001
From: Mark Bruning <mark.bruning@ensono.com>
Date: Fri, 16 Sep 2022 21:22:55 +0000
Subject: [PATCH] feat(changed): Add --cached option

---
 packages/changed/README.md              | 14 ++++++++++++++
 packages/changed/src/commands/filter.ts | 10 +++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/packages/changed/README.md b/packages/changed/README.md
index 2242556..825540f 100644
--- a/packages/changed/README.md
+++ b/packages/changed/README.md
@@ -33,6 +33,16 @@ yarn changed list --git-range master
 yarn changed list --git-range 93a9ed8..4ef2c61
 ```
 
+#### `--cached`
+
+Look only at staged changes in git. Useful for local development.
+
+Example:
+
+```sh
+yarn changed list --cached
+```
+
 #### `--include`
 
 Include workspaces.
@@ -73,6 +83,10 @@ Run a command on changed workspaces and their dependents. This command relies on
 
 See `yarn changed list`.
 
+#### `--cached`
+
+See `yarn changed list`.
+
 #### `--include`
 
 See `yarn changed list`.
diff --git a/packages/changed/src/commands/filter.ts b/packages/changed/src/commands/filter.ts
index c1f9cb3..00f07d0 100644
--- a/packages/changed/src/commands/filter.ts
+++ b/packages/changed/src/commands/filter.ts
@@ -7,6 +7,9 @@ export abstract class FilterCommand extends BaseCommand {
   @Command.String('--git-range')
   public gitRange?: string;
 
+  @Command.Boolean('--cached')
+  public cached = false;
+
   @Command.Array('--include')
   public include?: string[];
 
@@ -18,7 +21,12 @@ export abstract class FilterCommand extends BaseCommand {
   ): Promise<readonly Workspace[]> {
     const { stdout } = await execUtils.execvp(
       'git',
-      ['diff', '--name-only', ...(this.gitRange ? [this.gitRange] : [])],
+      [
+        'diff',
+        '--name-only',
+        ...(this.cached ? ['--cached'] : []),
+        ...(this.gitRange ? [this.gitRange] : []),
+      ],
       {
         cwd: project.cwd,
         strict: true,