Re: [pacman-dev] [PATCH 1/3] libmakepkg: use extraction commands instead of file to find archive type

On 27/11/19 7:29 am, Ethan Sommer wrote:

Previously, to determine which command we should use to extract an archive, we would run file and match the output against our list of possible extraction commands

Instead, run the archive through each extraction command's -t (--test) flag, if this succeeds then we know that the command is able to extract the file and is the one to use

Apart from the issues Eli brought up, there is a large performance regression on large source files. $ time file -bizL libreoffice-6.3.4.1.tar.xz application/x-tar; charset=binary compressed-encoding=application/x-xz; charset=binary real 0m0.034s user 0m0.031s sys 0m0.004s $ time xz -t libreoffice-6.3.4.1.tar.xz real 0m11.970s user 0m11.898s sys 0m0.057s Allan