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| author | Jean Delvare <jdelvare@suse.de> | 2012-02-01 18:08:49 +0100 |
|---|---|---|
| committer | Jean Delvare <jdelvare@suse.de> | 2012-02-01 18:08:49 +0100 |
| commit | 12c0bdf9e743195de8e16b4af4cca2b7cc8a78e0 (patch) | |
| tree | cf2eab2d0c1cf8178d8087e747c6150382b2c16c /quilt/scripts | |
| parent | 4313f8222262def7e5042c87ac0c2722da2501c0 (diff) | |
| download | quilt-12c0bdf9e743195de8e16b4af4cca2b7cc8a78e0.tar.gz | |
backup-files: Try mass copy first on copy
When copying many files to a snapshot directory, try a mass copy
first, as it is much faster. It is however not portable and may thus
fail. If it fails, fallback to per-file processing, which always
works.
This change results in a huge performance boost on systems where
the cp command supports all the required options (which includes
all systems using GNU coreutils.)
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Raphael Hertzog <hertzog@debian.org>
Diffstat (limited to 'quilt/scripts')
| -rw-r--r-- | quilt/scripts/backup-files.in | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/quilt/scripts/backup-files.in b/quilt/scripts/backup-files.in index 32d3d50..487a155 100644 --- a/quilt/scripts/backup-files.in +++ b/quilt/scripts/backup-files.in @@ -261,10 +261,24 @@ copy_many() done exec 3>&- - while read -d $'\0' -r - do - copy "$REPLY" - done < "$NONEMPTY_FILES" + if [ -s "$NONEMPTY_FILES" ]; then + # Try a mass copy first, as it is much faster. + # It is however not portable and may thus fail. If it fails, + # fallback to per-file processing, which always works. + + if xargs -0 cp -p --parents --target-directory="$OPT_PREFIX" \ + < "$NONEMPTY_FILES" 2> /dev/null; then + while read -d $'\0' -r + do + $ECHO "Copying $REPLY" + done < "$NONEMPTY_FILES" + else + while read -d $'\0' -r + do + copy "$REPLY" + done < "$NONEMPTY_FILES" + fi + fi } # Test if some backed up files have a link count greater than 1 |