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#!/usr/bin/env bash
# Update all remote-tracking branches, and as many local branches that
# we can fast-forward. Additionally, if the current branch looks like
# a dgit suite-tracking branch, merge into it the current state of the
# package in the Debian archive
# This script is based on the value of git_update set by the myrepos
# dgit plugin. That library uses an unconditional `git pull` to match
# global myrepos conventions. The main reason for having this script
# is to override that unconditional `git pull`
set -e
function branch_prefix() {
local branch="$1"
echo $branch | cut -s -d/ -f1
}
function branch_remote() {
local branch="$1"
git config branch.$branch.remote
}
current_branch="$(git rev-parse --abbrev-ref HEAD)"
branches="$(git for-each-ref --format='%(refname:short)' refs/heads/)"
# (1) normal git branches
# note that `git remote update` may not fetch all tags
git fetch --all --tags --prune
for branch in $branches; do
remote="$(branch_remote $branch 2>/dev/null || true)"
if [ "$(branch_prefix $branch)" != "dgit" ] && [ "$remote" != "" ]; then
# echo "I: attempting to fast-forward local branch $branch"
if ! git branch --contains "$branch@{upstream}" \
| grep -qE " $branch$"; then
# if the branch cannot be fast-forwarded, git-merge-ff
# will exit non-zero, so myrepos will report that the
# update failed, so user intervention is required
git merge-ff "$branch"
fi
fi
done
# (2) dgit branches
if [ "$(branch_prefix $current_branch)" = "dgit" ]; then
# echo "I: current branch is $current_branch; doing \`dgit pull\`"
dgit pull
fi
for suite in $(git show-ref | grep refs/remotes/dgit/dgit | cut -d/ -f5 ); do
# skip if we just called `dgit pull` on this suite
if ! [ "$current_branch" = "dgit/$suite" ]; then
# echo "I: fetching dgit suite $suite"
[ -z "$source" ] \
&& source=$(git cat-file blob dgit/dgit/$suite:debian/control \
| awk -F': ' '$1 ~ /Source/ { print $2 }')
dgit -p$source fetch $suite
fi
done
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