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#!/bin/bash
# We want to catch any command failure, and exit immediately
set -e
# Download helper for hg
# Call it with:
# $1: hg repo
# $2: hg cset
# $3: package's basename (eg. foobar-1.2.3)
# $4: output file
# And this environment:
# HG : the hg command to call
# BUILD_DIR: path to Buildroot's build dir
repo="${1}"
cset="${2}"
basename="${3}"
output="${4}"
repodir="${basename}.tmp-hg-checkout"
tmp_output="$( mktemp "${output}.XXXXXX" )"
cd "${BUILD_DIR}"
# Remove leftovers from a previous failed run
rm -rf "${repodir}"
# Play tic-tac-toe with temp files
# - first, we download to a trashable location (the build-dir)
# - then we create a temporary tarball in the final location, so it is
# on the same filesystem as the final file
# - finally, we atomically rename to the final file
ret=1
if ${HG} clone --noupdate --rev "${cset}" "${repo}" "${repodir}"; then
if ${HG} archive --repository "${repodir}" --type tgz \
--prefix "${basename}" --rev "${cset}" \
"${tmp_output}"; then
mv "${tmp_output}" "${output}"
ret=0
fi
fi
# Cleanup
rm -rf "${repodir}" "${tmp_output}"
exit ${ret}
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