helper script to fetch down dependent layers

meta-rust has some layers it depends on and this script ensures it
fetches them down appropriately so that the poky directory can be used
as the source.

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>

scripts/fetch.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+# the repos we want to check out, must setup variables below
+# NOTE: poky must remain first
+REPOS="poky metaoe"
+
+POKY_URI="git://git.yoctoproject.org/poky.git"
+POKY_PATH="poky"
+POKY_REV="${POKY_REV-refs/remotes/origin/$1}"
+
+METAOE_URI="git://git.openembedded.org/meta-openembedded.git"
+METAOE_PATH="poky/meta-openembedded"
+METAOE_REV="${METAOE_REV-refs/remotes/origin/$1}"
+
+METARUST_URI="."
+METARUST_PATH="poky/meta-rust"
+
+die() {
+	echo "$*" >&2
+	exit 1
+}
+
+update_repo() {
+	uri=$1
+	path=$2
+	rev=$3
+
+	# check if we already have it checked out, if so we just want to update
+	if [[ -d ${path} ]]; then
+		pushd ${path} > /dev/null
+		echo "Updating '${path}'"
+		git remote set-url origin "${uri}"
+		git fetch origin || die "unable to fetch ${uri}"
+	else
+		echo "Cloning '${path}'"
+		git clone ${uri} ${path} || die "unable to clone ${uri}"
+		pushd ${path} > /dev/null
+	fi
+
+	# The reset steps are taken from Jenkins
+
+	# Reset
+	# * drop -d from clean to not nuke build/tmp
+	# * add -e to not clear out bitbake bits
+	git reset --hard || die "failed reset"
+	git clean -fx -e bitbake -e meta/lib/oe || die "failed clean"
+
+	# Call the branch what we're basing it on, otherwise use default
+	# if the revision was not a branch.
+	branch=$(basename ${rev})
+	[[ "${branch}" == "${rev}" ]] && branch="default"
+
+	# Create 'default' branch
+	git update-ref refs/heads/${branch} ${rev} || \
+		die "unable to get ${rev} of ${uri}"
+	git config branch.${branch}.remote origin || die "failed config remote"
+	git config branch.${branch}.merge ${rev} || die "failed config merge"
+	git symbolic-ref HEAD refs/heads/${branch} || die "failed symbolic-ref"
+	git reset --hard || die "failed reset"
+	popd > /dev/null
+	echo "Updated '${path}' to '${rev}'"
+}
+
+# For each repo, do the work
+for repo in ${REPOS}; do
+	# upper case the name
+	repo=$(echo ${repo} | tr '[:lower:]' '[:upper:]')
+
+	# expand variables
+	expand_uri="${repo}_URI"
+	expand_path="${repo}_PATH"
+	expand_rev="${repo}_REV"
+	repo_uri=${!expand_uri}
+	repo_path=${!expand_path}
+	repo_rev=${!expand_rev}
+
+	# check that we've got data
+	[[ -z ${repo_uri} ]] && die "No revision defined in ${expand_uri}"
+	[[ -z ${repo_path} ]] && die "No revision defined in ${expand_path}"
+	[[ -z ${repo_rev} ]] && die "No revision defined in ${expand_rev}"
+
+	# now fetch/clone/update repo
+	update_repo "${repo_uri}" "${repo_path}" "${repo_rev}"
+
+done
+
+rm -rf "${METARUST_PATH}" || die "unable to clear old ${METARUST_PATH}"
+ln -sf "../${METARUST_URI}" "${METARUST_PATH}" || \
+	die "unable to symlink ${METARUST_PATH}"
+
+exit 0