Configs

project

Project configs are only available for the current project and stored in .git/config in the project's directory.

$ git config user.name "John Doe"

cat .git/config
[core]
    repositoryformatversion = 0
    filemode = true
    bare = false
    logallrefupdates = true
    ignorecase = true
    precomposeunicode = true
[remote "origin"]
    url = git@github.com:xxx/xx.git
    fetch = +refs/heads/*:refs/remotes/origin/*
[user]
    name = username
    email = email@example.com
[branch "master"]
    remote = origin
    merge = refs/heads/master

global

Global configs are available for all projects for the current user and stored in ~/.gitconfig.

$ git config --global user.name "John Doe"

In your .gitconfig you can put something like this.

[includeIf "gitdir:~/company_a/"]
  path = .gitconfig-company_a
[includeIf "gitdir:~/company_b/"]
  path = .gitconfig-company_b

Example contents of .gitconfig-company_a

[user]
name = John Smith
email = john.smith@companya.net

Example contents of .gitconfig-company_b

[user]
name = John Smith
email = js@companyb.com

system

System configs are available for all the users/projects and stored in /etc/gitconfig.

$ git config --system user.name "John Doe"

proxy

git config --local http.proxy 'socks5://127.0.0.1:1080'
git config --local https.proxy 'socks5://127.0.0.1:1080'