Enabling all USE flags for a package?

[Etal]

Someone out there decided that Qt has too much documentation, and so made a bunch of USE flags with some modules disabled.

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[ebuild     U  ] dev-qt/qt-docs-5.9.3_p201711211135:5::gentoo [5.9.2_p201710050733:5::gentoo] USE="webengine%* -charts% -datavis% -networkauth% -script% -speech% -virtualkeyboard%" 210,634 KiB

Well, if I'm installing the ~500 MB docs package for offline use, I might as well sacrifice another 45 MB to install all of them.

The question is, how can I set all the flags to enabled without adding them one by one? If a new flag gets added, I don't want to have to update my package.use.

The opposite is easy - to disable all flags, set them to -*. But setting the flags to * doesn't do anything.

[LIsLinuxIsSogood]

If a new flag gets added, I don't want to have to update my package.use.

Seems like you are asking for something that is impossible to know, which is like auto accepting the changes from an upstream or package maintainer. Have you thought of taking it in steps and first scripting something that would allow you to check to see if any changes to the flags have been made? Then if so at that point you might find it easier to just add them at a later time. Personally, on both my laptop and desktops I am sure that I could take a close look as I have to from time to time and see how I screwed up so many of the USE flag settings but when it comes time to do any heavy projects with a piece of software that is when I will go and check if it was installed with the ones needed.

What do these qt5 doc flags look like, I haven't caught even a glimpse of it yet since I run on gnome.

[Mr. T.]

The original documentation consists of various documents (look at the ebuild) and the package brings them together.

Personally, I've tried app-portage/flaggie. Note, it is necessary to take into account the syntax specified in the file package.use.

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flaggie dev-qt/qt-docs +
flaggie '=dev-qt/qt-docs-5.9.3_p201711211135' +
flaggie '>=dev-qt/qt-docs-5.9.3_p201711211135' +

The previous three commands don't produce the same result!

helecho.

[bunder]

I know that "flag" and "+flag" are supposed to be synonymous, but did you happen to try "+*"?

[krinn]

I know that "flag" and "+flag" are supposed to be synonymous, but did you happen to try "+*"?

I did, i like this kind of weird test

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USE="+*" emerge -pv vlc --nodeps
USE flags should not start with a '+': +*

These are the packages that would be merged, in order:

USE flags should not start with a '+': +*
USE flags should not start with a '+': +*
USE flags should not start with a '+': +*
USE flags should not start with a '+': +*
[ebuild     U  ] media-video/vlc-2.2.6-r2:0/5-8::gentoo [2.2.6-r1:0/5-8::gentoo] USE="X a52 aalib alsa avcodec avformat cdda dbus dvbpsi dvd encode fdk ffmpeg flac gcrypt gnutls gstreamer jpeg libcaca libnotify libsamplerate live matroska modplug mp3 mpeg musepack ncurses ogg opengl png qt4 qt5 sdl sdl-image skins svg swscale theora truetype udev v4l vdpau vlm vorbis x264 xcb xml xv (-altivec) -atmo (-audioqueue) -bidi -bluray -cddb -chromaprint -dc1394 -debug -directfb (-directx) -dts -dvb (-dxva2) -faad -fluidsynth -fontconfig -gme -gnome -growl -httpd -ieee1394 -jack -kate -libass -libav -libtar -libtiger -linsys -lirc -lua (-macosx-dialog-provider) (-macosx-eyetv) (-macosx-qtkit) (-macosx-quartztext) -mtp (-neon) -omxil -opencv -optimisememory -opus -postproc -projectm -pulseaudio -rdp -rtsp -run-as-root -samba -schroedinger -sftp -shout -sid -speex -taglib {-test} -tremor -twolame -upnp -vaapi -vcdx -vnc -vpx -wma-fixed -x265 -zeroconf -zvbi (-kde%)" CPU_FLAGS_X86="mmx sse" 0 KiB

[bunder]

Eww. So much for that idea.

(OT: did that change recently, or am I just dreaming?)

[krinn]

Eww. So much for that idea.

(OT: did that change recently, or am I just dreaming?)

Should mistake with some tools output, that specify + for clarity, like equery do

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 + - avcodec           : Enables libavcodec support for video/audio

[Mr. T.]

The application is broken by design when package.use ([bug=451396]package.*[/bug]) is a directory! Proceed with caution.

The + "action symbol" enables one USE flag but without argument specified, flaggie evaluates the "action specification" as +?*.

An action specification consists of an action symbol and an optional or
obligatory argument (flag). The action symbols are:

- `+` to enable a flag,
- `-` to disable a flag,
- `%` to reset the flag(s) to the default state (remove them completely
from the files),
- `?` to print the effective flag declaration from the files.

Each of the actions should be followed by an argument. It could be
a flag name, a keyword or a license string. Arguments can be shell
patterns (same as in filename matching). If no argument is passed,
flaggie assumes `?*`.

With `+` and `-` actions, pattern matching is performed against package
`IUSE`, `KEYWORDS` or `LICENSE` variable. With `%` and `?`, it is done
against values specified in `package.*` files.

helecho.

[Ant P.]

The question is, how can I set all the flags to enabled without adding them one by one? If a new flag gets added, I don't want to have to update my package.use.

If you're feeling lucky, put this in a /etc/portage/repo.postsync.d/ script.

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#!/bin/sh
grep IUSE $(equery w dev-qt/qt-docs) \
    | sed 's@^IUSE="\(.*\)"$@dev-qt/qtdocs \1@' \
    >> /etc/portage/package.use/qtdocs.conf

[Hu]

Wouldn't that accumulate new entries with each sync, since you're using append rather than overwrite?

You could eliminate the use of grep by relying on sed to delete lines that are not interesting. sed -e '/^IUSE=/!d' -e 's@^IUSE="\(.*\)"$@dev-qt/qtdocs \1@' (underlined portion copied unchanged from Ant P.'s example, so that readers can copy the full command in one step).