Spaces:
Running
Running
| # An example hook script to update a checked-out tree on a git push. | |
| # | |
| # This hook is invoked by git-receive-pack(1) when it reacts to git | |
| # push and updates reference(s) in its repository, and when the push | |
| # tries to update the branch that is currently checked out and the | |
| # receive.denyCurrentBranch configuration variable is set to | |
| # updateInstead. | |
| # | |
| # By default, such a push is refused if the working tree and the index | |
| # of the remote repository has any difference from the currently | |
| # checked out commit; when both the working tree and the index match | |
| # the current commit, they are updated to match the newly pushed tip | |
| # of the branch. This hook is to be used to override the default | |
| # behaviour; however the code below reimplements the default behaviour | |
| # as a starting point for convenient modification. | |
| # | |
| # The hook receives the commit with which the tip of the current | |
| # branch is going to be updated: | |
| commit=$1 | |
| # It can exit with a non-zero status to refuse the push (when it does | |
| # so, it must not modify the index or the working tree). | |
| die () { | |
| echo >&2 "$*" | |
| exit 1 | |
| } | |
| # Or it can make any necessary changes to the working tree and to the | |
| # index to bring them to the desired state when the tip of the current | |
| # branch is updated to the new commit, and exit with a zero status. | |
| # | |
| # For example, the hook can simply run git read-tree -u -m HEAD "$1" | |
| # in order to emulate git fetch that is run in the reverse direction | |
| # with git push, as the two-tree form of git read-tree -u -m is | |
| # essentially the same as git switch or git checkout that switches | |
| # branches while keeping the local changes in the working tree that do | |
| # not interfere with the difference between the branches. | |
| # The below is a more-or-less exact translation to shell of the C code | |
| # for the default behaviour for git's push-to-checkout hook defined in | |
| # the push_to_deploy() function in builtin/receive-pack.c. | |
| # | |
| # Note that the hook will be executed from the repository directory, | |
| # not from the working tree, so if you want to perform operations on | |
| # the working tree, you will have to adapt your code accordingly, e.g. | |
| # by adding "cd .." or using relative paths. | |
| if ! git update-index -q --ignore-submodules --refresh | |
| then | |
| die "Up-to-date check failed" | |
| fi | |
| if ! git diff-files --quiet --ignore-submodules -- | |
| then | |
| die "Working directory has unstaged changes" | |
| fi | |
| # This is a rough translation of: | |
| # | |
| # head_has_history() ? "HEAD" : EMPTY_TREE_SHA1_HEX | |
| if git cat-file -e HEAD 2>/dev/null | |
| then | |
| head=HEAD | |
| else | |
| head=$(git hash-object -t tree --stdin </dev/null) | |
| fi | |
| if ! git diff-index --quiet --cached --ignore-submodules $head -- | |
| then | |
| die "Working directory has staged changes" | |
| fi | |
| if ! git read-tree -u -m "$commit" | |
| then | |
| die "Could not update working tree to new HEAD" | |
| fi | |