Batch Script: Export last git commit message to a variable

Question

I'm trying to assign the last commit message inside a git repository to a variable in a windows batch script and then export the variable. From a lot of questions from StackOverflow, it seems that the command should be:

for /f "Tokens=2" %a in ('git log -1 --pretty=%B') do @set commit_message=%a

export %commit_message%

But it's giving the following error.

fatal: ambiguous argument '%B': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

In Linux it is quite straight forward. Only export commit_message=$(git log -1 --pretty=%B).

This question is specifically tagged batch-file therefore try either, ... %%X In ('git log -1 --pretty^=%%B') Do @Set "commit_message=%%X" or ... %%X In ('"git log -1 --pretty=%%B"') Do @Set "commit_message=%%X". — Compo
– Compo, Commented Dec 9, 2017 at 18:32

Marco Rebsamen · Accepted Answer · 2017-12-09 18:01:12Z

2

It looks like you can't parse the git command directly. This worked on my site:

@echo off
git log -1 --pretty=%%B > %temp%\git.txt
for /f "Tokens=*" %%a in (%temp%\git.txt) do @set commit_message=%%a

echo %commit_message%
::export %commit_message%

Note the doubled '%'. I'm not sure about that export command. I've never seen this. Maybe setx is what you need?

answered Dec 9, 2017 at 18:01

Marco Rebsamen

6057 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Arnab Das Over a year ago

set is fine as I'm using the variable value in the same script. setx sets the variables to be used by future spawned cmd's not the current one. Thanks for your help.

Collectives™ on Stack Overflow

Batch Script: Export last git commit message to a variable

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related