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Allow git-filter-branch to process large repositories with lots of branches.

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A recommended way to move trees between repositories is to use
git-filter-branch to revise the history for a single tree:

However, this can lead to "argument list too long" errors when the
original repository has many retained branches (>6k)

    /usr/local/git/libexec/git-core/git-filter-branch: line 270:
    /usr/local/git/libexec/git-core/git: Argument list too long
    Could not get the commits

Saving the output from rev-parse and feeding it into rev-list from
its standard input avoids this problem, since the rev-parse output
is not processed as a command line argument.

Signed-off-by: Lee Carver <Lee.Carver@servicenow.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Lee Carver
2013-09-10 22:55:35 +00:00
committed by Junio C Hamano
parent 2ea3df68e8
commit 3361a548db
1 changed files with 2 additions and 2 deletions
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4
git-filter-branch.sh
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@ -255,7 +255,7 @@ else
remap_to_ancestor=t remap_to_ancestor=t
fi fi
rev_args=$(git rev-parse --revs-only "$@") git rev-parse --revs-only "$@" >../parse
case "$filter_subdir" in case "$filter_subdir" in
"") "")
@ -268,7 +268,7 @@ case "$filter_subdir" in
esac esac
git rev-list --reverse --topo-order --default HEAD \ git rev-list --reverse --topo-order --default HEAD \
--parents --simplify-merges $rev_args "$@" > ../revs || --parents --simplify-merges --stdin "$@" <../parse >../revs ||
die "Could not get the commits" die "Could not get the commits"
commits=$(wc -l <../revs | tr -d " ") commits=$(wc -l <../revs | tr -d " ")