# git
![git](../img/git.jpg)
## Clone with submodule recurse

add *--recurse-submodules* to clone command

## Add in staging only a part of modification done in a file

`git add -p`

this will ask if you want to add each modification with this option:

- *y* - Yes, add this hunk
- *n* - No, don’t add this hunk
- *d* - No, don’t add this hunk and all other remaining hunks. Useful if you’ve already added what you want to, and want to skip over the rest
- *s* - Split the hunk into smaller hunks. This only works if there’s unchanged lines between the changes in the displayed hunk, so this wouldn’t have any effect in the example above
- *e* - Manually edit the hunk. This is probably the most powerful option. As promised, it will open the hunk in a text editor and you can edit it to your hearts content

## delete a file only from git repository

`git rm -rf --cached`

## delete a file from complete history

be carefull can't push repo last time use

`git filter-branch --tree-filter 'rm -f passwords.txt' HEAD`

## changing email adress

```
$ git filter-branch --commit-filter '
        if [ "$GIT_AUTHOR_EMAIL" = "schacon@localhost" ];
        then
                GIT_AUTHOR_NAME="Scott Chacon";
                GIT_AUTHOR_EMAIL="schacon@example.com";
                git commit-tree "$@";
        else
                git commit-tree "$@";
        fi' HEAD
```

## example de déclencheur git dans un dépot git

```bash
#!/bin/bash
GIT_REPO=`pwd`
SITE_NAME=notebook
TMP_GIT_CLONE="/tmp/$SITE_NAME"
PUBLIC_WWW="/usr/share/nginx/html/$SITE_NAME"
# get branch name
if ! [ -t 0 ]; then
  read -a ref
fi
IFS='/' read -ra REF <<< "${ref[2]}"
branch="${REF[2]}"

if [ "master" == "$branch" ]; then
mkdir -p $TMP_GIT_CLONE
echo "download repo"
git clone --recursive $GIT_REPO $TMP_GIT_CLONE
cd $TMP_GIT_CLONE
export PATH="$HOME/.local/bin:$PATH"
make install -e BUILDDIR=$PUBLIC_WWW
echo "Cleaning up"
rm -Rf $TMP_GIT_CLONE
fi
exit

```