• http://gitready.com/advanced/2009/02/10/squashing-commits-with-rebase.html

• http://book.git-scm.com/5_creating_new_empty_branches.html

git symbolic-ref HEAD 'refs/heads/newbranch'
 
rm '.git/index'
 
git clean -fdx 
 
git commit --allow-empty -m 'Initial commit'

git fetch --all --prune --tags

git push origin --all
 
git push origin --tags

git remote rm 'origin-foo'

• Helyileg:

  git tag -d 12345

• Távol:

  git push origin :refs/tags/12345

git config --local rerere.enabled true
 
git config --local rerere.autoupdate true

• http://stackoverflow.com/questions/1365541/how-to-move-files-from-one-git-repo-to-another-not-a-clone-preserving-history

1. Patchek kigyűjtése:

   git log 'from-patch..to-patch' --pretty=email --patch-with-stat --reverse './wanted-folder-and-subfolders' > 'patches'

2. Patch-ben lévő elérési útvonalak módosítása
3. Módosított patch alkalmazása a másik repón:

   git am -3 < 'patches'

• http://stackoverflow.com/a/28335092/1108919

git reflog expire --expire=now --all
 
git gc --aggressive --prune=now

git cherry-pick --abort
 
git am --abort
 
git merge --abort
 
git rebase --abort

git reset --hard
 
git clean -fd

1. Elkevert patch-ek:

   git lost-found
    
   gitk $(cd '.git/lost-found/commit' && echo ??*)

2. Szükséges patch-ek megjelölése (pl: tag-eléssel, vagy branch létrehozással)

• http://stackoverflow.com/questions/801577/how-to-recover-git-objects-damaged-by-hard-disk-failure

• http://en.newinstance.it/2011/02/27/how-to-create-a-statically-linked-version-of-git-binaries/

# let's make sure we have all we need to proceed 
sudo apt-get install libexpat1-dev asciidoc libz-dev gettext curl
 
# let's create the directory to host the built artifacts
sudo mkdir /opt/git-1.7.4.1-static
 
# we are ready to download and unpack latest version of git sources (last: http://git-scm.com/)
curl http://kernel.org/pub/software/scm/git/git-1.7.4.1.tar.bz2 | tar xvj
cd git-1.7.4.1/
 
# then compile and install the files in the target directory we created
./configure --prefix=/opt/git-1.7.4.1-static CFLAGS="${CFLAGS} -static" NO_OPENSSL=1 NO_CURL=1
sudo make install
sudo make install-doc

1. Git repó inicializálása:

   git init

2. SVN felhasználónév ⇔ Git committer egyeztetése a C:\Users\foo\Desktop\users.txt fájlban (kis-, nagybetű érzékeny!):

   users.txt

   foobar = Foo Bar <foo.barm@gmail.com>
   Fooar = Foo Bar <foo.barm@gmail.com>
   FooBar = Foo Bar <foo.barm@gmail.com>
   APPLETREE = Apple Tree <applet@gmail.com>

3. Git config:

   .git/config

   [core]
   	repositoryformatversion = 0
   	filemode = false
   	bare = false
   	logallrefupdates = true
   	symlinks = false
   	ignorecase = true
   	hideDotFiles = dotGitOnly
   [svn-remote "svn"]
   	noMetadata = 1
   	url = http://localhost:2080/svn/Devel/MAINLINE
   	fetch = :refs/remotes/git-svn
   [svn]
   	pathnameencoding = iso-8859-2
   	authorsfile = d:/Users/foo/Repositories/git/users.txt

4. git svn init 'http://localhost:2080/svn/Devel/MAINLINE' --no-metadata
   git svn init 'http://localhost:2080/svn/Test' --no-metadata
    
   git config svn.authorsfile '/c/Users/foo/Desktop/users.txt'
   git config svn.pathnameencoding 'cp1252'  # Linuxon ne állítsd be!
    
   git svn fetch
    
   rm -r '.git/svn' '.git/refs/remotes/git-svn'

git filter-branch --env-filter '
    # bash kód a környezeti változók lecserélésére
    ' HEAD

• GIT_AUTHOR_NAME
• GIT_AUTHOR_EMAIL
• GIT_AUTHOR_DATE
• GIT_COMMITTER_NAME
• GIT_COMMITTER_EMAIL
• GIT_COMMITTER_DATE

man git-filter-branch

• GIT_COMMIT
• GIT_DIR
• GIT_INDEX_FILE
• GIT_OBJECT_DIRECTORY
• GIT_QUIET
• GIT_WORK_TREE

• http://serverfault.com/questions/12373/how-do-i-edit-gits-history-to-correct-an-incorrect-email-address-name/13162#13162

git filter-branch --tag-name-filter 'cat' --env-filter '
    oldname="FooBarZ"
    oldemail="foobarz@dummy.com"
    newname="Foo Bar"
    newemail="foo@bar.com"
    [ "$GIT_AUTHOR_NAME" == "$oldname" ] && GIT_AUTHOR_NAME="$newname"
    [ "$GIT_AUTHOR_EMAIL" == "$oldemail" ] && GIT_AUTHOR_EMAIL="$newemail"
    [ "$GIT_COMMITTER_NAME" == "$oldname" ] && GIT_COMMITTER_NAME="$newname"
    [ "$GIT_COMMITTER_EMAIL" == "$oldemail" ] && GIT_COMMITTER_EMAIL="$newemail"
    ' -- --all

• http://stackoverflow.com/a/17864475/1108919

1. Álljunk a célrepóba, majd adjuk meg a forrás repó helyét és az átemelni kívánt branch-et:

   git pull '../forras-repo' master

• http://stackoverflow.com/questions/2246208/change-first-commit-of-project-with-git/2309391#2309391

git rebase --root ...

• az „official way”:

  git for-each-ref --format='%(refname)' refs/original/ | 
      xargs -n 1 git update-ref -d

• egyszerűbben:

  rm -rf '.git/refs/original'

• https://git-scm.com/docs/git-filter-branch

• https://makingsoftware.wordpress.com/2013/02/16/using-git-subtrees-for-repository-separation/

git subtree split --prefix='path/of/code' -b 'destination-branch'

export path_prefix='foo'
git filter-branch --tag-name-filter 'cat' --index-filter '
  git ls-files -s |
    sed "s>\t\"*>&'"${path_prefix}"'/>" |
      GIT_INDEX_FILE="${GIT_INDEX_FILE}.new" git update-index --index-info &&
        mv "${GIT_INDEX_FILE}.new" "${GIT_INDEX_FILE}"
' -- --all

git subtree split --prefix='path/of/code' -b 'destination-branch'

Pl. az összes fájl és mappa mozgatása egy újonnan létrehozott web könyvtárba:

git filter-branch --tree-filter '
  mkdir -p web
  for fso in $(ls -A | grep -Ev '"'"'^(web|\.git)$'"'"')
  do
    new="web/$(echo "${fso}" | sed '"'"'s>^poc->>'"'"')"
    echo "# $fso >> $new"
    mv "$fso" "$new"
  done
' -- --all

local_commit="`git rev-parse HEAD`"
remote_commit="`git rev-parse @{u}`"
 
if [ "${local_commit}" == "${remote_commit}" ]; then
    echo "No changed"
fi

git add -A && git absorb -b origin/master --force