Git cheatsheet
==============

## Find all instances of text in all commits ##

```sh
git grep "text to look for" $(git rev-list --all)
```

## List commit messages since given commit ##

```sh
git log --pretty=format:%s HASH..HEAD
```

## Config repository master branch to only accept non-fast forward commits ##

```sh
git config branch.master.mergeoptions  "--no-ff"
```
**Hint:** Don't do this on your local working copy, or everytime you do a 'pull' from origin it will create yet another explicit commit (as opposed to a simple fast-forward).

## Move branch to master without checking out ##

```sh
git branch -f <BRANCH_TO_MOVE> master
```
    
## Speed up Git in Windows ##

(From http://stackoverflow.com/a/24045966)

You can significantly speed up git on Windows by running three commands to set some config options:

```sh
git config --global feature.manyFiles true
git config --global core.preloadindex true
git config --global core.fscache true
git config --global gc.auto 256
```

Notes:

* `core.preloadindex` does filesystem operations in parallel to hide latency and will be enabled by default in future versions of git on all platforms (update: enabled in v2.1)

* `core.fscache` fixes UAC issues (don't need to run git as admin)

* `gc.auto` minimizes the number of files in .git

## Show all changed files between two Git commits ##

```sh
git diff --name-status SHA1 SHA2
```

## Find largest files in repo ##

Saves results to text file bigtosmall.txt

(From http://naleid.com/blog/2012/01/17/finding-and-purging-big-files-from-git-history)

```sh
git rev-list --objects --all | sort -k 2 > allfileshas.txt
```

```sh
git gc && git verify-pack -v .git/objects/pack/pack-*.idx | egrep "^\w+ blob\W+[0-9]+ [0-9]+ [0-9]+$" | sort -k 3 -n -r > bigobjects.txt
```

```sh
for SHA in `cut -f 1 -d\  < bigobjects.txt`; do
echo $(grep $SHA bigobjects.txt) $(grep $SHA allfileshas.txt) | awk '{print $1,$3,$7}' >> bigtosmall.txt
done;
```