diskimage-builder/elements/source-repositories/extra-data.d/98-source-repositories
Chris Jones 4c7a3bf79f Improve source-repositories git caching.
We now unconditionally cache the repositories being fetched with
source-repositories.

Additionally, by improving the way we handle repository refs, we are now
able to build images with code taken directly from gerrit reviews.

Change-Id: Ifd4c5691f6761eb5551663e6d0aa1c0e42afced3
2013-12-20 14:48:30 +00:00

124 lines
5.2 KiB
Bash
Executable File

#!/bin/bash
set -eu
# Gets repositories or individual files listed in the a repository file
# and places them in the specified destination path.
# The format of the repository file is one or more lines matching
# <name> <type> <destination> <location> [<ref>]
function get_repos_for_element(){
local REPO_SOURCES=$1
local CACHE_URL=$TMP_HOOKS_PATH/bin/cache-url
local REGEX="^([^ ]+) (git|tar|file) (/[^ ]+) ([^ ]+) ?([^ ]*)$"
while read line ; do
# ignore blank lines and lines begining in '#'
[[ "$line" == \#* ]] || [[ -z "$line" ]] && continue
if [[ "$line" =~ $REGEX ]] ; then
local REPONAME=${BASH_REMATCH[1]}
local REPOTYPE=${BASH_REMATCH[2]}
local REPOPATH=${BASH_REMATCH[3]}
local REPOLOCATION=${BASH_REMATCH[4]}
local REPO_ORIG_LOCATION=$REPOLOCATION
local REPOREF=${BASH_REMATCH[5]:-master}
local REPO_DEST=$TMP_MOUNT_PATH$REPOPATH
local REPO_SUB_DIRECTORY=$(dirname $REPO_DEST)
# REPOTYPE can be overridden with DIB_REPOTYPE_{name}
local REPOTYPE_OVERRIDE=DIB_REPOTYPE_${REPONAME//-/_}
REPOTYPE=${!REPOTYPE_OVERRIDE:-$REPOTYPE}
# REPOLOCATION can be overridden with DIB_REPOLOCATION_{name}
local REPOLOCATION_OVERRIDE=DIB_REPOLOCATION_${REPONAME//-/_}
REPOLOCATION=${!REPOLOCATION_OVERRIDE:-$REPOLOCATION}
# REPOREF can be overridden with DIB_REPOREF_{name}
local REPOREF_OVERRIDE=DIB_REPOREF_${REPONAME//-/_}
REPOREF=${!REPOREF_OVERRIDE:-$REPOREF}
# Determine a unique cache path for this repo
CACHE_NAME=$(echo "${REPOTYPE}_${REPOLOCATION}" | sha1sum | awk '{ print $1 }' )
CACHE_PATH=~/.cache/image-create/repository-sources/$CACHE_NAME
case $REPOTYPE in
git)
sudo mkdir -p $REPO_SUB_DIRECTORY
if [ ! -e "$CACHE_PATH" ] ; then
echo "Caching $REPONAME from $REPOLOCATION in $CACHE_PATH"
git clone $REPOLOCATION $CACHE_PATH.tmp
mv ${CACHE_PATH}{.tmp,}
fi
HAS_REF=$(git --git-dir=$CACHE_PATH/.git show-ref $REPOREF || true)
if [ -z "$DIB_OFFLINE" -o -z "$HAS_REF" ] ; then
echo "Updating cache of $REPOLOCATION in $CACHE_PATH with ref $REPOREF"
git --git-dir=$CACHE_PATH/.git fetch --update-head-ok $REPOLOCATION ${REPOREF}:${REPOREF}
fi
echo "Cloning from $REPONAME cache and applying ref $REPOREF"
sudo git clone $CACHE_PATH $REPO_DEST
pushd $REPO_DEST
sudo git fetch $CACHE_PATH $REPOREF
sudo git reset --hard FETCH_HEAD
popd
;;
tar)
# The top level directory of the tarball mightn't have a fixed name i.e.
# it could contain version numbers etc... so we write it to a tmpdir
# the then move the contents into the directory we want it in, this does
# assume the tarball only contains a single top level directory
local tmpdir=$(mktemp --tmpdir=$TMP_MOUNT_PATH/tmp -d)
if [ -n "$CACHE_PATH" ] ; then
echo "Caching $REPONAME tarball from $REPOLOCATION in $CACHE_PATH"
if [ ! -f "$CACHE_PATH" -o -z "$DIB_OFFLINE" ] ; then
$CACHE_URL $REPOLOCATION $CACHE_PATH
fi
tar -C $tmpdir -xzf $CACHE_PATH
else
echo "Fetching $REPONAME tarball from $REPOLOCATION"
curl $REPOLOCATION | tar -C $tmpdir -xzf -
fi
sudo mkdir -p $REPO_DEST
sudo mv $tmpdir/*/* $REPO_DEST
rm -rf $tmpdir
;;
file)
sudo mkdir -p $REPO_SUB_DIRECTORY
if [ -n "$CACHE_PATH" ] ; then
echo "Caching $REPONAME file from $REPOLOCATION in $CACHE_PATH"
if [ ! -f "$CACHE_PATH" -o -z "$DIB_OFFLINE" ] ; then
$CACHE_URL $REPOLOCATION $CACHE_PATH
fi
sudo cp $CACHE_PATH $REPO_DEST
else
echo "Fetching $REPONAME file from $REPOLOCATION"
sudo curl $REPOLOCATION -o $REPO_DEST
fi
;;
*)
echo "Unsupported repository type"
return 1
;;
esac
# Capture the in-instance repository path for later review / other
# elements (like a pypi dependency cache).
echo "$REPOPATH" | sudo dd of=$TMP_MOUNT_PATH/etc/dib-source-repositories oflag=append conv=notrunc
else
echo "Couldn't parse '$line' as a source repository"
return 1
fi
done < $REPO_SOURCES
}
mkdir -p ~/.cache/image-create/repository-sources/
# Get source repositories for the target
for _SOURCEREPO in $(find $TMP_HOOKS_PATH -maxdepth 1 -name "source-repository-*" -not -name '*~'); do
get_repos_for_element $_SOURCEREPO
done