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version.sh: add a little usage comment 

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Timothy Gu 2013-11-28 16:57:49 -08:00 committed by Michael Niedermayer
parent a3b9f53d7b
commit 3c5c4cfa15
1 changed files with 2 additions and 0 deletions
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version.sh
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@ -1,5 +1,7 @@
#!/bin/sh
# Usage: version.sh <ffmpeg-root-dir> <output-version.h> <extra-version>
# check for git short hash
if ! test "$revision"; then
revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)