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| author | Jonathan Nieder <jrnieder@gmail.com> | 2009-08-09 13:22:12 -0500 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2009-08-09 22:27:22 +0300 |
| commit | 1d314b81aa5b0c4530638ffabd4e0edb52e5362c (patch) | |
| tree | f3e478912cf18aa0d58a7ec72d641c3cf0b55987 /src/scripts/xzless.in | |
| parent | GPLv2+ not GPLv2 for Doxyfile.in is probably OK. (diff) | |
| download | xz-1d314b81aa5b0c4530638ffabd4e0edb52e5362c.tar.xz | |
xzless: Support compressed standard input
It can be somewhat confusing that
less < some_file.txt
works fine, whereas
xzless < some_file.txt.xz
does not. Since version 429, ‘less’ allows a filter specified in
the LESSOPEN environment variable to preprocess its input even if
it comes from standard input, if $LESSOPEN begins with ‘|-’. So
set $LESSOPEN to take advantage of this feature.
Check less’s version at runtime so xzless can continue to work
with older versions.
Diffstat (limited to '')
| -rw-r--r-- | src/scripts/xzless.in | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/scripts/xzless.in b/src/scripts/xzless.in index 6639943a..a3da697c 100644 --- a/src/scripts/xzless.in +++ b/src/scripts/xzless.in @@ -46,7 +46,13 @@ if test "${LESSMETACHARS+set}" != set; then LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~' fi -LESSOPEN="|$xz -cdfq -- %s" +if test "$(less -V | { read ver && echo ${ver#less }; })" -ge 429; then + # less 429 or later: LESSOPEN pipe will be used on + # standard input if $LESSOPEN begins with |-. + LESSOPEN="|-$xz -cdfq -- %s" +else + LESSOPEN="|$xz -cdfq -- %s" +fi export LESSMETACHARS LESSOPEN exec less "$@" |