Ludovic wanted to add useflags to guix. https://lists.gnu.org/archive/html/guix-devel/2019-05/msg00285.html I don't know what became of it.
On Tue, Sep 15, 2020 at 2:44 PM raingloom <raingl...@riseup.net> wrote: > > On Tue, 15 Sep 2020 14:06:11 +0200 > Tobias Geerinckx-Rice via Bug reports for GNU Guix <bug-guix@gnu.org> > wrote: > > > Hi Nathan, > > > > Nathan Dehnel 写道： > > > bash-5.0$ youtube-dl -x > > > https://www.youtube.com/watch?v=7Ijd_iN9Blk > > > [youtube] 7Ijd_iN9Blk: Downloading webpage > > > [download] Deadmau5 - Hit Save-7Ijd_iN9Blk.webm has already been > > > downloaded > > > [download] 100% of 15.45MiB > > > ERROR: ffprobe/avprobe and ffmpeg/avconv not found. Please > > > install one. > > > > It works fine without ‘-x’: > > > > λ youtube-dl https://www.youtube.com/watch?v=7Ijd_iN9Blk > > [youtube] 7Ijd_iN9Blk: Downloading webpage > > [download] Destination: Deadmau5 - Hit Save-7Ijd_iN9Blk.mp4 > > [download] 100% of 37.09MiB in 00:02 > > > > This *is* functioning correctly in my view: that advanced options > > optionally require run-time dependencies is not a bug but a > > feature. The programme clearly explains which package could be > > installed to continue, and the user can chose which one they > > prefer - including neither, which suffices for the majority of > > youtube-dling. > > > > Matters would be different if the error message were less clear, > > or perhaps if ffmpeg weren't so insanely great: > > > > λ guix size youtube-dl | tail -n1 > > total: 186.9 MiB > > λ guix size youtube-dl ffmpeg | tail -n1 > > total: 811.2 MiB > > > > (!) > > > > Kind regards, > > > > T G-R > > Maybe it's time we added an "optional dependencies" field? > There seems to be a bug report or help request like every week that > just boils down to "this package has an undocumented dependency".
