Git

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Revision as of 18:51, 14 February 2019 by Milk (talk | contribs) (→‎Plumbing)
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Reference

See also Vim#Git



Guides

Articles

Consider how a common Git workflow falls apart.

Create a branch off Master, do work, and merge it back into Master when you’re done

Most of the time this behaves as you expect because Master changed since you branched. Then one day you merge a feature branch into Master, but Master hasn’t diverged. Instead of creating a merge commit, Git points Master to the latest commit on the feature branch, or “fast forwards.” (Diagram)

Unfortunately, your feature branch contained checkpoint commits, frequent commits that back up your work but captures the code in an unstable state. Now these commits are indistinguishable from Master’s stable commits. You could easily roll back into a disaster.






Config

git config --global --edit
  open config file in editor

git config --global user.name "Your Name Here"
git config --global user.email "your_email@youremail.com"

git config color.ui true
  turns on colour for everything
git config format.pretty oneline

git config --global push.default matching
  (will be default soon)



git config --global help.autocorrect 10

git config --global credential.helper 'cache --timeout=3600'

The credential helper only works when you clone an HTTPS repo URL. If you use the SSH repo URL instead, SSH keys are used for authentication.

Aliases

Bare repo

To convert repo to bare repo; [13] 

mv repo/.git repo.git
git --git-dir=repo.git config core.bare true
rm -rf repo

Commands

See Vim#Git

Clone

git clone git://github.com/SomeUser/SomeRepo.git
  # clone read-only repo

git clone git@github.com:UserName/OtherRepo.git
  # clone with SSH key

git clone https://github.com/UserName/OtherRepo
  # clone with github username

git clone --reference git git://github.com/git/git git2
  # clone local

Repo config

  • git config receive.denyCurrentBranch warn - allow pushing to a non-base repo
git repo-config core.sharedRepository true - allow access by multiple users


Status

git status
  # show repo status

git status -uno
  # show status without untracked file list

Describe

git describe
  # last tag plus number of releases from that tag plus abbreviated sha

git describe --abbrev=0 --tags
  # gets tag from current branch

Listing

git ls-files --modified

git ls-tree -r HEAD --name-only

Diff

See also Vim#Git 

git diff
  # diff uncommitted changes

git diff --cached
  # diff changes in the staging area

git diff master <branch>
  # show difference between master and another branch

git diff shaOfCheckIn
  # show diff between sha and current

git show shaOfCheckIn
  # show diff of sha from previous
  # or
git diff shaOfCheckIn^ shaOfCheckIn
git diff shaOfCheckIn{^,}

git diff <revision_1>:<file_1> <revision_2>:<file_2>
  # diff between two files

git diff --dirstat=files --no-index dir1/ dir2/
  # diff between any two directory contents

Patches

git diff > change.patch
# create a patch

git diff > [description]-[issue-number]-[comment-number].patch
# create a Drupal patch

git apply -v <patch>
# apply patch. also;

curl https://github.com/github/jobs/pull/25.patch | git am

Adding files

git add .
  # add file to Index (staging)

git add *
  # add all (except those in .gitignore) files to Index

git add -p
  # add hunks seperatly [14]

# y = stage, n = don't stage, q = quit,

git ls-files --modified | xargs git add
  # list modified (not untracked) and add [15]

Committing

Committing moves files from Index into HEAD. 

git commit -m Commit message goes here.

git commit -a
  git adds at the same time

git commit --amend
  without file change, alter last commit msg

git commit --verbose
  # or -v, add diff to commit message comments (not the commit message)

Remotes

git remote -v
  # list all remotes

git remote add origin <server>

git remote show origin

git remote set-url origin git://github.com/chief/global.git

git remote set-url --push origin git@github.com:User/forked.git

git remote set-url --push origin DISABLE

git branch --set-upstream master origin/master
  # branch master set up to track remote branch master from origin.

Sending/receiving

git fetch [origin] [master]
  get files from origin master remote

git pull [origin] [master]
  fetch from and merge with another repository or a local branch

git push otherrepo <branch>
  stick branch on otherrepo remote

Reset

git reset --hard HEAD
  reset any uncommitted changes in Index
git reset --hard origin/master
  reset from remote master

Rebase

Branches

git branch
  # list branches with current starred
git branch -a
  # list branches (including remote)

git branch <branch>
  # create branch
git branch -d <branch>
  # delete branch

Staging

git checkout <branch>
  # switch to working on <branch>
git checkout -b <branch>
  # same as "git branch <branch> | git checkout <branch>"

git checkout -- <file>
  # checkout file from HEAD

git checkout -
   check out previous branch

git checkout HEAD@{1}
  checkout next commit on current branch

git checkout HEAD~
  checkout previous commit on current branch

Merging

git merge <branch>
  merge branch, keep branch in commit log

cd path/to/project-b
git remote add project-a path/to/project-a
git fetch project-a
git merge project-a/master # or whichever branch you want to merge
git remote remove project-a [16]

git rebase <branch> - fast-forward merge current to <branch> (?)

Stash

Log

git log
  list commits with message and sha
git log .
  log for current directory

git log --since="today"
git log --since="6am"

git log -p
  show diffs
git log -p -2
   show second two last diffs

lol = log --graph --decorate --pretty=oneline --abbrev-commit

git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit

Bisect

Merging

git mergetool

git mergetool -t opendiff


Meld GUI is worth checking.

Fugitive

:ls
  list window numbers

[c
  jump to previous changeset

]c
  jump to next changeset

:diffget [window]
   get change from active window to working

:diffupdate
   redraw diff highlighting

Tags

git tag
  list repo tags
git tag 1.0 <sha>
  tag <sha> (branch+commit hash) with 1.0

tags point to a sha. use git checkout [tag] to change to the commit.

Submodules

git submodule add git@mygithost:project [--branch x.y] [directory/path]
  # add submodule and checkout specific branch

git submodule init
git submodule update

or 

git submodule update --init
  # bootstrap submodules listed in .gitmodules after cloning somewhere

git submodule foreach git pull origin master
  # update all submodules



git submodule deinit directory/path
  # disable a submodule

git rm --cached path/to/submodule
  # remove a submodule

Subtrees

.gitignore

  • man gitignore - Specifies intentionally untracked files to ignore

Example to exclude everything except a specific directory foo/bar (note the /* - without the slash, the wildcard would also exclude everything within foo/bar): 

$ cat .gitignore
# exclude everything except directory foo/bar
/*
!/foo
/foo/*
!/foo/bar

*
!.gitignore
!sxhkd/sxhkdrc
!bspwm/*
!compton.conf
!gtk-2.0/gtkrc-2.0
!/myrepos

Archive to tar

git archive [18]
  default output is tar
git archive master | tar -x -C /somewhere/else
  pipe to extraction
git archive --format=tar --remote=git@server:repo.git master | tar -xf -

also, Legit.

Bundle

  • https://git-scm.com/docs/git-bundle - provides support for git fetch and git pull to operate by packaging objects and references in an archive at the originating machine, then importing those into another repository using git fetch and git pull after moving the archive by some means (e.g., by sneakernet). As no direct connection between the repositories exists, the user must specify a basis for the bundle that is held by the destination repository: the bundle assumes that all objects in the basis are already in the destination repository.


Filter branch

Plumbing

CLI tools

Zsh prompt symbols

Status:
✔:	repository clean
●n:	there are n staged files
✖n:	there are n unmerged files
✚n:	there are n changed but unstaged files
…:	there are some untracked files

Branch:
↑n:	ahead of remote by n commits
↓n:	behind remote by n commits
↓m↑n:	branches diverged, other by m commits, yours by n commits
::	hash, not a branch

Ncurses

tig

gita

  • https://github.com/nosarthur/gita - a command-line tool to manage multiple git reposThis tool does two thingsdisplay the status of multiple git repos such as branch, modification, commit message side by sidedelegate git commands/aliases from any working directory


to sort

  • https://github.com/icefox/git-achievements - records all of the achievements you acquire while using Git. There are over 40 achievements, most with different levels to be achieved. After a git command is executed if a new achievement is unlocked git-achievements will display a message on the console for your enjoyment:




GUI







  • https://github.com/jesseduffield/lazygit - A simple terminal UI for git commands, written in Go with the gocui library.Are YOU tired of typing every git command directly into the terminal, but you're too stubborn to use Sourcetree because you'll never forgive Atlassian for making Jira? This is the app for you!

Handy

  • git-up - fetch and rebase all locally-tracked remote branches
  • SCM Breeze is a set of shell scripts (for bash and zsh) that enhance your interaction with git. It integrates with your shell to give you numbered file shortcuts, a repository index with tab completion, and many other useful features. [20]
  • git-export - Export the contents of the current git index to the given destination, ready to rock.
  • git pissed tracks any number of words across your entire git history. The defaults are wildly offensive and inspired by Vidar Holen's Linux Kernel Swear Counts.
  • gitsome - A Supercharged Git/Shell Autocompleter with GitHub Integration. [22]

Large files

git-annex

GitMedia

LFS

Repository management

Articles

Git used for private repo, with Gitweb for easy overview.

git-daemon

Gitolite

  • create git user
  • ~/.ssh/authorized_keys is empty or non-existent
  • put pub key in $HOME/YourName.pub
git clone git://github.com/sitaramc/gitolite
mkdir -p $HOME/bin
gitolite/install -to $HOME/bin
gitolite setup -pk YourName.pub

gitolite-admin is only accessible with the public key named after the git account used for the gitolite

GitLab

recommends 1Gb ram!

gerrit

RhodeCode

GitBucket

Gitblit

Gogs

Gitea

Services

GitHub

Tools

  • github-cli - command-line interface to GitHub's Issues API (v2)
  • hub is a command-line wrapper for git that makes you better at GitHub.
  • willitmerge - A command line tool to check if pull requests are mergeable.

Gist

Related

  • GitTorrent - a peer-to-peer network of Git repositories being shared over BitTorrent. You can read more about the project at this blog post. The design of GitTorrent has five components: A "git transport helper" that knows how to download and unpack git objects, and can be used by Git itself to perform a fetch/clone/push. A distributed hash table that advertises which git commits a node is willing to serve. A BitTorrent protocol extension that negotiates sending a packfile with needed objects to a peer. A key/value store on the distributed hash table, used as a "user profile" describing a user's repositories and their latest git hashes. A method for registering friendly usernames on Bitcoin's blockchain, so that a written username can be used to find a user instead of an ugly hex string.
  • http://prose.io/ - static site management
  • Ost.io ("open-source talks") is a forum for open-source projects and the best place for discussing project stuff with other users. It is tightly integrated with GitHub.

Bitbucket

N.b. https clone url includes username@, which will require password. remove this for straight-through access. 

curl -k -X POST --user user:pass "https://api.bitbucket.org/1.0/repositories" -d "name=project_name"

https://<user>:<pass>@bitbucket.org/<user>/<project>.git

Other

to sort



Plumbing


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