Some workflows require coordinated development between repositories on
machines that can never be connected. This utility creates a bundle
containing a pack of objects and associated references (heads or tags)
that can be independently transferred to another machine, effectively
supporting git-push like operations between disconnected systems.
Signed-off-by: Mark Levedahl <mdl123@xxxxxxxxxxx>
---
git-bundle.sh | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 112 insertions(+), 0 deletions(-)
create mode 100755 git-bundle.sh
diff --git a/git-bundle.sh b/git-bundle.sh
new file mode 100755
index 0000000..f56f499
--- /dev/null
+++ b/git-bundle.sh
@@ -0,0 +1,112 @@
+#!/bin/sh
+# Create a bundle to carry from one git repo to another
+# (e.g., "sneaker-net" based push)
+# git-bundle <git-rev-list args>
+# git-bundle --bare <git-rev-list args>
+# creates bundle.tar in current directory (can rename of course)
+#
+# The bundle includes all refs given (--all selects every ref in the repo).
+# and all of the commit objects needed subject to the list given.
+#
+# Objects to be packed are limited by specifying one or more of
+# ^commit-ish - indicated commits already at the target
+# (can have more than one ^commit-ish)
+# --since=xxx - Assume target repo has all relevant commits
+# earlier than xxx
+
+USAGE='git-bundle [-o file | --output=file] <git-rev-list arguments>'
+SUBDIRECTORY_OK=1
+. git-sh-setup
+
+bfile=bundle.tar
+args=
+while test -n "$1" ; do
+ case $1 in
+ -h|--h|--he|--hel|--help)
+ echo "$USAGE"
+ exit;;
+ --output=*)
+ bfile=${1##--output=};;
+ -o|--output)
+ shift
+ bfile=$1;;
+ *)
+ args="$args $1"
+ esac
+ shift
+done
+
+unknown=$(git-rev-parse --no-revs $args)
+test -z "$unknown" || die "unknown option: $unknown"
+gitrevargs=$(git-rev-parse --symbolic --revs-only $args) || exit 1
+
+# find the refs to carry along and get sha1s for each.
+refs=
+fullrevargs=
+for arg in $gitrevargs ; do
+ #ignore options and basis refs, get unambiguous ref name for things
+ # we will transport (e.g., user gives master, have heads/master and
+ # remotes/origin/master, we keep the former).
+ case "$arg" in
+ -*) fullrevargs="$fullrevargs $arg";;
+ ^*) fullrevargs="$fullrevargs $arg";;
+ *) ref=$(git-show-ref "$arg")
+ test "$(echo $ref | wc -w)" = "2" || die "Ambigous reference: $arg
+$ref"
+ fullrevargs="$fullrevargs ${ref#* }"
+ refs="$refs $ref"
+ ;;
+ esac
+done
+test -z "$refs" && die "No references specified, I don't know what to bundle."
+
+# git-rev-list cannot determine edge objects if a date restriction is
+# given... we do things a slow way if max-age or min-age are given
+case "$fullrevargs" in
+ *--max-age* | *--min-age*)
+ # get a list of all commits that will be packed along with
+ # parents of each. A fixed git-rev-list --boundary should
+ # replace all of this.
+ echo "Finding prerequisites and commits to bundle..."
+ commits=$(git-rev-list $fullrevargs)
+
+ # get immediate parents of each commit to include
+ parents=
+ for c in $commits ; do
+ parents="$parents $(git-rev-list --parents --max-count=1 $c | cut -b42-)"
+ done
+ parents=$(printf "%s\n" $parents | sort | uniq)
+
+ # factor out what will be in this bundle, the remainder are the
+ # bundle's prerequisites. double up commits in this as we only
+ # want things that are only in parents to appear once
+ prereqs=$(printf "%s\n" $parents $commits $commits | \
+ sort | uniq -c | sed -ne 's/^ *1 //p');;
+ *)
+ prereqs=$(git-rev-list --objects-edge $fullrevargs | sed -ne 's/^-//p');;
+esac
+
+# create refs and pack
+tmp=$GIT_DIR/bundle_tmp$$
+references="$tmp-references"
+pack="$tmp-pack"
+trap 'rm -f "$references" "$pack"' 0 1 2 3 15
+
+echo "v1" > "$references" &&
+echo "prerequisites" >> "$references" &&
+printf "%s\n" $prereqs >> "$references" &&
+echo "references" >> "$references" &&
+git-show-ref $refs >> "$references" &&
+(git-rev-list --objects $fullrevargs | \
+ cut -b-40 | \
+ git pack-objects --all-progress --stdout >> "$pack" ) \
+ || exit
+
+# create the tar file, clean up
+tar cf "$bfile" --absolute-names --transform="s,$tmp-,," \
+ --verbose --show-transformed-names \
+ "$references" "$pack"
+rm -f "$pack" "$references"
+
+# done
+echo "Created $bfile"
--
1.5.0.rc4.375.gd0938-dirty
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