see changes and revert back

Excellent — since you already used:

repo forall -c 'git status --short'

…you now know which files have changed. Let’s now go step-by-step to:

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✅ 1. See What Changes You Made

To view exactly what was changed (line by line) in each file:

🔍 View changes in a specific file

git diff path/to/file

Example:

git diff modules/java-middleware/Android.bp

🔍 View all changes across the repo

If you want to see all your local edits:

git diff

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🔁 2. Revert Changes and Get Back to Original

Depending on the file status, you have two options:

🟢 A. Revert modified files (those with M)

Use:

git restore path/to/file

Example:

git restore modules/java-middleware/Android.bp

If you want to restore all modified files:

git restore .

💡 git restore is safe and doesn't touch untracked files.

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🟡 B. Remove untracked files (those with ??)

These are files Git is not tracking (e.g., new .apk, new .bp, new folders).

To delete all untracked files and directories:

🧹 Dry run (safe to check first)

git clean -nd

🧹 Remove untracked files only

git clean -f

🧹 Remove untracked files and directories

git clean -fd

⚠️ Warning: This is irreversible. Don’t run unless you're sure.

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🔒 Tip: Work Per Project with repo forall

If you want to see diffs across all projects:

repo forall -c 'git diff'

To revert all changes in all projects:

repo forall -c 'git restore .'
repo forall -c 'git clean -fd'

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📘 Summary

Task	Command
See changes in file	git diff path/to/file
See all changes	git diff
Restore modified file	git restore path/to/file
Restore all modified files	git restore .
See untracked files	git status
Delete untracked files	git clean -f
Delete untracked files & folders	git clean -fd

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Would you like a script that summarizes the changes across all modules and lets you choose what to revert?