pikeyd165 – Blame information for rev 1
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | office | 1 | #!/bin/sh |
| 2 | |||
| 3 | # An example hook script to update a checked-out tree on a git push. |
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| 4 | # |
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| 5 | # This hook is invoked by git-receive-pack(1) when it reacts to git |
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| 6 | # push and updates reference(s) in its repository, and when the push |
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| 7 | # tries to update the branch that is currently checked out and the |
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| 8 | # receive.denyCurrentBranch configuration variable is set to |
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| 9 | # updateInstead. |
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| 10 | # |
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| 11 | # By default, such a push is refused if the working tree and the index |
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| 12 | # of the remote repository has any difference from the currently |
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| 13 | # checked out commit; when both the working tree and the index match |
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| 14 | # the current commit, they are updated to match the newly pushed tip |
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| 15 | # of the branch. This hook is to be used to override the default |
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| 16 | # behaviour; however the code below reimplements the default behaviour |
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| 17 | # as a starting point for convenient modification. |
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| 18 | # |
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| 19 | # The hook receives the commit with which the tip of the current |
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| 20 | # branch is going to be updated: |
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| 21 | commit=$1 |
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| 22 | |||
| 23 | # It can exit with a non-zero status to refuse the push (when it does |
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| 24 | # so, it must not modify the index or the working tree). |
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| 25 | die () { |
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| 26 | echo >&2 "$*" |
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| 27 | exit 1 |
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| 28 | } |
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| 29 | |||
| 30 | # Or it can make any necessary changes to the working tree and to the |
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| 31 | # index to bring them to the desired state when the tip of the current |
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| 32 | # branch is updated to the new commit, and exit with a zero status. |
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| 33 | # |
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| 34 | # For example, the hook can simply run git read-tree -u -m HEAD "$1" |
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| 35 | # in order to emulate git fetch that is run in the reverse direction |
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| 36 | # with git push, as the two-tree form of git read-tree -u -m is |
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| 37 | # essentially the same as git switch or git checkout that switches |
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| 38 | # branches while keeping the local changes in the working tree that do |
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| 39 | # not interfere with the difference between the branches. |
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| 40 | |||
| 41 | # The below is a more-or-less exact translation to shell of the C code |
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| 42 | # for the default behaviour for git's push-to-checkout hook defined in |
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| 43 | # the push_to_deploy() function in builtin/receive-pack.c. |
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| 44 | # |
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| 45 | # Note that the hook will be executed from the repository directory, |
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| 46 | # not from the working tree, so if you want to perform operations on |
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| 47 | # the working tree, you will have to adapt your code accordingly, e.g. |
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| 48 | # by adding "cd .." or using relative paths. |
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| 49 | |||
| 50 | if ! git update-index -q --ignore-submodules --refresh |
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| 51 | then |
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| 52 | die "Up-to-date check failed" |
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| 53 | fi |
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| 54 | |||
| 55 | if ! git diff-files --quiet --ignore-submodules -- |
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| 56 | then |
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| 57 | die "Working directory has unstaged changes" |
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| 58 | fi |
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| 59 | |||
| 60 | # This is a rough translation of: |
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| 61 | # |
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| 62 | # head_has_history() ? "HEAD" : EMPTY_TREE_SHA1_HEX |
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| 63 | if git cat-file -e HEAD 2>/dev/null |
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| 64 | then |
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| 65 | head=HEAD |
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| 66 | else |
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| 67 | head=$(git hash-object -t tree --stdin </dev/null) |
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| 68 | fi |
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| 69 | |||
| 70 | if ! git diff-index --quiet --cached --ignore-submodules $head -- |
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| 71 | then |
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| 72 | die "Working directory has staged changes" |
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| 73 | fi |
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| 74 | |||
| 75 | if ! git read-tree -u -m "$commit" |
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| 76 | then |
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| 77 | die "Could not update working tree to new HEAD" |
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| 78 | fi |