Use current branch as filename-CodePudding

Most of the times I generate a diff file for my branches, like so: git diff trunk.. > .git/diffs/branch_name.diff

What I would like to do is change branch_name to the output of git branch --show-current. I've tried doin something like git diff trunk.. > '.git/diffs/ $(git branch --show-current) .diff' but that stores it with the filename literary as $(git branch --show-current) .diff

Is there a way for me to do this as a one liner?

CodePudding user response：

Unix shells ignore metacharacters inside single quotes (apostrophes). Use double quotes or no quotes:

git diff trunk.. > ".git/diffs/ $(git branch --show-current) .diff"

git diff trunk.. > .git/diffs/ $(git branch --show-current) .diff

PS. Some metacharacters are ignored in double quotes too. Most notable is *. Compare echo * and echo "*"