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Editorial Team
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Asked: 2026-05-26T00:50:41+00:00

I’m trying to use the following post-commit hook to deploy to a particular directory

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I’m trying to use the following post-commit hook to deploy to a particular directory after each successful commit:

#!/bin/sh
export GIT_WORK_TREE=/var/www/example/
export GIT_DIR=/home/mark/test/.git/
git checkout -f

However, after committing I get the following error:

$ git commit -m 'An example commit.'
fatal: Unable to create '/var/www/example/.git/index.lock': No such file or directory
[master 0938e48] An example commit.

… as if the GIT_WORK_TREE setting is being ignored. Why does setting this environment variable appear to be not working? I’m using git version 1.7.4.1.

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1 Answer

  1. Editorial Team

    The problem here is that in post-commit hooks (and also
    pre-commit, prepare-commit-msg and commit-msgt) the
    GIT_INDEX_FILE environment variable is set to .git/index. (This
    isn’t documented in the githooks
    documentation    , but I’ve
    posted elsewhere about the settings of environment variables and the
    current directory in git
    hooks    .)

    The effect of the GIT_INDEX_FILE environment variable is described
    in the ENVIRONMENT VARIABLES section of the git man page as:

    GIT_INDEX_FILE

    This environment [variable] allows the specification of an alternate index file. If not specified, the default of $GIT_DIR/index is used.

    … and for some reason, in this situation, GIT_INDEX_FILE is being
    used relative to GIT_WORK_TREE.

    To make the hook work as you would expect, you just need to unset
    GIT_INDEX_FILE, so your hook would look like:

     #!/bin/sh
 unset GIT_INDEX_FILE
 export GIT_WORK_TREE=/var/www/example/
 export GIT_DIR=/home/mark/test/.git/
 git checkout -f
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