[Buildroot] [git commit] support/download: fix the git helper output file format

[Thomas Petazzoni]

commit: http://git.buildroot.net/buildroot/commit/?id=8f76366c0f14861321bc73c2f18306af45ce9f1a
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master

The git helper uses gzip to compress the intermediate tarball. But gzip
removes the source file, and create a new file named by appending .gz to
the original file name.

Thus, we end up with output.gz, while the download wrapper expects jsut
output, and thus believes the downlaod failed.

Fix that by storing the tar from git to a temporary file, then pipe this
file to gzip's stdin, and redirect gzip's stdout to the output file.

Reported-by: Graham Newton <gnewton at peavey-eu.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Peter Seiderer <ps.report at gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
 support/download/git |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/support/download/git b/support/download/git
index d451530..ff6b5c3 100755
--- a/support/download/git
+++ b/support/download/git
@@ -34,6 +34,6 @@ if [ ${git_done} -eq 0 ]; then
 fi
 
 GIT_DIR="${basename}" \
-${GIT} archive --prefix="${basename}/" -o "${output}" --format=tar "${cset}"
+${GIT} archive --prefix="${basename}/" -o "${output}.tmp" --format=tar "${cset}"
 
-gzip "${output}"
+gzip <"${output}.tmp" >"${output}"