Git config different emails for Github & BitBucket

Hi all, today I want to share a little trick I found for git config files.

For a long time I've been facing a small but annoying problem. When using git on command line you have to set your name and email. You can either do this globally or locally.

In my case I'm creating and downloading new repos often. The end result accidentally signing a work commit with my personal email, or vise versa.

I seem to have found a good solution.

Instead of having a hard-coded config a post-checkout hook is run.

This hook is invoked when a git-checkout is run after having updated the worktree. The hook is given three parameters: the ref of the previous HEAD, the ref of the new HEAD (which may or may not have changed), and a flag indicating whether the checkout was a branch checkout (changing branches, flag=1) or a file checkout (retrieving a file from the index, flag=0). This hook cannot affect the outcome of git-checkout.

File location ~/.git-templates/hooks/post-checkout make sure to make it executable with chmod +x ~/.git-templates/hooks/post-checkout.

---

#!/usr/bin/env bash

# make regex matching below case insensitive
shopt -s nocasematch

# values in the services array should have a corresponding section in
# .gitconfig where the 'name' and 'email' for that service are specified
remote_url="$( git config --get --local remote.origin.url )"
services=(
    'github'
    'bitbucket'
)

set_local_user_config() {
    local service="${1}"
    local config="${2}"
    local service_config="$( git config --get ${service}.${config} )"
    local local_config="$( git config --get --local user.${config} )"

    if [[ "${local_config}" != "${service_config}" ]]; then
        git config --local "user.${config}" "${service_config}"
        echo "repo 'user.${config}' has been set to '${service_config}'"
    fi
}

# if remote_url doesn't contain the any of the values in the services
# array the user name and email will remain unset and the
# user.useConfigOnly = true setting in .gitconfig will prompt for those
# credentials and prevent commits until they are defined
for s in "${services[@]}"; do
    if [[ "${remote_url}" =~ "${s}" ]]; then
        set_local_user_config "${s}" 'name'
        set_local_user_config "${s}" 'email'
        break
    fi
done

The script searches the remote url for the service string "bitbucket" or "github" it will then reference our config file that looks something like:

[github]
    name = Philip Kirkbride
    email = [email protected]
[bitbucket]
    name = Philip Kirkbride
    email = [email protected]
[init]
    templatedir = ~/.git-templates
[user]
    useConfigOnly = true

Great solution, all credit to Grant Humphries on StackoverFlow.

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Since I don't have a photo for this post here is an escalators under-construction that I saw on the way to the coffee shop this morning.