How to rebase + GPG sign + Signed-off-by in one line

rebase-sign-signoff.md

Set up the user information

Before calling the rebase, your configuration should be set up to sign the commits.

# Open the configuration inside your editor
git config --global -e

[user]
	name = Your Name
	email = your_email@example.com
	signingkey = YOUR_KEY

Rebase

Rebase and sign the commits:

git rebase -S <parent-ish> --exec "git commit --amend --no-edit"

Rebase, sign the commits, and append Signed-off-by: inside the commit message:

git rebase --signoff -S <parent-ish>

Amend

Amend the previous commit and sign it:

# Short form flags
git commit --amend -S --no-edit

# Long form flags
git commit --amend --gpg-sign --no-edit

Amend the previous commit, sign it, and append Signed-off-by: inside the commit message:

# Short form flags
git commit --amend -s -S --no-edit

# Long form flags
git commit --amend --signoff --gpg-sign --no-edit

References

• (rebase) --exec: https://git-scm.com/docs/git-rebase#Documentation/git-rebase.txt---execcmd
• (rebase) --signoff: https://git-scm.com/docs/git-rebase#Documentation/git-rebase.txt---signoff
• (rebase) --gpg-signkey/-S: https://git-scm.com/docs/git-rebase#Documentation/git-rebase.txt---gpg-signkeyid
• (commit) --amend: https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---amend
• (commit) --no-edit: https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---no-edit
• (commit) --signoff/-s: https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---signoff
• (commit) --gpg-sign/-S: https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---gpg-signkey-id

Extra

Always sign for one repository:

# Inside the repository, run the following command:
git config --local commit.gpgsign true

Always sign for all repositories:

git config --global commit.gpgsign true