Gradle: how to show diff between 2 commits in a task?

Help/Discuss
1

How to write a gradle task that shows the difference between 2 commits in git and export the difference in a txt file?

I tried to create the task below but the task doesn’t seem to export into a txt file.

task diffLiterals() {
   
  description = 'get the difference between 2 commits in the literals.csv'
  def cmd = 'git diff HEAD^  HEAD --no-ext-diff model/localizations/literals-en.csv > test.txt'
  def diffFile = cmd.execute()
   
}

Running the git command itself in a terminal works fine though.

git diff HEAD^ HEAD --no-ext-diff  model/localizations/literals-en.csv > diff.txt
2

You might want to look into the Gradle Git plugin. It uses a pure Java Git client (JGit) so you can avoid all the nastiness of shelling out to the command line.

3

And as for why your task is not working, it’s because it’s not declaring any action.

You need to write
task diffLiterals()<< {
…
}