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-rwxr-xr-xsupport/download/hg35
1 files changed, 28 insertions, 7 deletions
diff --git a/support/download/hg b/support/download/hg
index d2e69c35ff..6e9e26b925 100755
--- a/support/download/hg
+++ b/support/download/hg
@@ -10,16 +10,37 @@ set -e
# $3: package's basename (eg. foobar-1.2.3)
# $4: output file
# And this environment:
-# HG : the hg command to call
-# BR2_DL_DIR: path to Buildroot's download dir
+# HG : the hg command to call
+# BUILD_DIR: path to Buildroot's build dir
repo="${1}"
cset="${2}"
basename="${3}"
output="${4}"
-cd "${BR2_DL_DIR}"
-${HG} clone --noupdate --rev "${cset}" "${repo}" "${basename}"
-${HG} archive --repository "${basename}" --type tgz --prefix "${basename}" \
- --rev "${cset}" "${output}"
-rm -rf "${basename}"
+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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