-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 06/17/2013 04:19 PM, Diego Elio Pettenò wrote: > On 17/06/2013 17:54, Rick "Zero_Chaos" Farina wrote: >> I make all my files with "tar cJf" >> >> zero@ozzie ~ % file /usr/portage/distfiles/gr-osmosdr-0.0.2.tar.xz >> /usr/portage/distfiles/gr-osmosdr-0.0.2.tar.xz: XZ compressed data > > cJ with _current_ tar will generate XZ > cJ with _past_ tar could generate lzma > xJ with _current_ tar will extract both XZ and lzma > zJ with _past_ tar will only extract lzma > > tar for the last several years properly and automatically detects the format of the input using just 'x'. This is true for gnu and bsd tar which should cover all of gentoo. We should be passing "tar xf" to extract things unless we want to hijack the decompression command like is possible in portage with BZIP2_COMMAND=lbzip2 in which case we want to pass "tar -I $BZIP2_COMMAND -xf" or (not yet in portage) "tar -I pixz - -xf". Some good examples of how this are handled are in catalyst but I'll let dolson talk about his own work as he is much more qualified than I am.
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