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103 lines
2.5 KiB
103 lines
2.5 KiB
#!/bin/bash
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#!-
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. /etc/shlib
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#!-
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DOCKER_UPDATE_PATH=${DOCKER_UPDATE_PATH:-/srv/docker-updates}
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include common
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include pretty
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usage="$exname COMPONENT MASTER_IMAGE_NAME BRANCH UPDATED_IMAGE_NAME"
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COMPONENT_NAME="$1"
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MASTER_IMAGE_NAME="$2"
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BRANCH="$3"
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UPDATED_IMAGE_NAME="$4"
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## Note: we will need in the DOCKER_UPDATE_HOST:
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## - git-sub
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## should we check for aufs ?
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mkdir -p "$DOCKER_UPDATE_PATH"
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cd "$DOCKER_UPDATE_PATH"
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if ! [ -d "$COMPONENT_NAME" ]; then
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echo "ERROR: repository $DOCKER_UPDATE_PATH//$COMPONENT_NAME is not existent."
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echo "You should build it on this host prior to run this hook."
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echo "As a remainder: this host is supposed to keep the reference git that"
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echo "was used to built the master image."
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exit 1
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fi
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if [ -e "$COMPONENT_NAME.locked" ]; then
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echo "Master is being updated."
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echo "Or '$COMPONENT_NAME.locked' file was left dangling over."
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exit 1
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fi
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clean_all() {
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cd /
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mountpoint "$tmpdir_root" 2>/dev/null && umount "$tmpdir_root"
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[ -d "$tmpdir_root" ] && rmdir "$tmpdir_root"
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[ -d "$tmpdir_changes" ] && rm -rf "$tmpdir_changes"
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}
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tmpdir_changes=$(mktemp -d /tmp/$COMPONENT_NAME.changes.XXXXXX)
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tmpdir_root=$(mktemp -d /tmp/$COMPONENT_NAME.root.XXXXXX)
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trap "clean_all" EXIT
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mount -t aufs -o br=$tmpdir_changes:$DOCKER_UPDATE_PATH/$COMPONENT_NAME -o udba=none none "$tmpdir_root"
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cd "$tmpdir_root"
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## XXXvlab: We probably would need to:
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## - fetch only the module concerned
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## - fetch only the ref concerned
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git fetch origin "$BRANCH"
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git checkout "$BRANCH"
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git sub update
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cd / &&
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umount "$tmpdir_root" &&
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rmdir "$tmpdir_root"
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if [ "$?" != 0 ]; then
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echo "Uh oh... could not umount aufs $tmpdir_root or delete it."
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exit 1
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fi
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cd "$tmpdir_changes"
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echo "Cleaning the change layer."
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find . -name .git -type d -exec rm -rf {} \; -prune
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## XXXvlab: if we produced it we shouldn't have to pull it
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echo "Pulling $MASTER_IMAGE_NAME"
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docker pull "$MASTER_IMAGE_NAME" >/dev/null 2>&1
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container_id=$(docker run -d \
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-v $tmpdir_changes:/mnt/changes \
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"$MASTER_IMAGE_NAME" \
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/bin/bash -c "
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mkdir -p /srv/app/{root,changes}
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cp -a /mnt/changes /srv/app/changes/0000
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ls /srv/app/changes/0000
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")
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if [ "$(docker wait "$container_id")" != "0" ]; then
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echo "Copy of changes to docker images failed !"
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echo "Log of container:"
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docker logs $container_id
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exit 1
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fi
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docker commit --author "$exname" \
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--message "Automatic Updater" \
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"$container_id" \
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"$UPDATED_IMAGE_NAME"
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docker push "$UPDATED_IMAGE_NAME"
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