Bug 330386 - Cannot Specify Global and Per-Module Options from the Command Line
Summary: Cannot Specify Global and Per-Module Options from the Command Line
Status: RESOLVED FIXED
Alias: None
Product: kdesrc-build
Classification: Developer tools
Component: general (show other bugs)
Version: unspecified
Platform: Gentoo Packages Linux
: NOR normal
Target Milestone: ---
Assignee: Michael Pyne
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-01-25 08:25 UTC by David E. Narvaez
Modified: 2014-01-26 05:22 UTC (History)
0 users

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Description David E. Narvaez 2014-01-25 08:25:55 UTC
While the help message says any unnamed options from the command line are passed as global or per-module options, that doesn't seem to work for me here.

Reproducible: Always

Steps to Reproduce:
1. ./kdesrc-build --help
2. ./kdesrc-build --async=false --stop-on-failure=true
Actual Results:  
1. [...]

    --<option>=          Any unrecognized options are added to the global
                         configuration, overriding any value that may exist.
    --<module>,<option>= Likewise, this allows you to override any module
                         specific option from the command line.
[...]
2. $ ./kdesrc-build --async=false --stop-on-failure=true
Script started processing at Sat Jan 25 03:17:18 2014
 * Downloading projects.kde.org project database...
Runtime error: Unknown KDE project: --async=false
        Can't continue, so stopping now.


Expected Results:  
kdesrc-build should run in async mode

Obviously, the options are interpreted as modules to build, but that means GetOpt is sending those options to the non-option <> handler, which seems like a bug in GetOpt because Application.pm configures GetOpt with pass_through so those options should eventually be processed from $ARGV if I understand correctly.
Comment 1 Michael Pyne 2014-01-26 02:40:40 UTC
Yes, this was broken in the large refactoring of the option-reading code, looks like I missed this one though. :-/
Comment 2 David E. Narvaez 2014-01-26 02:50:59 UTC
I took the issue to GetOpt::Long to see what they think and they suggest handling the options in <>, which makes sense (see the discussion at the bug report).

https://rt.cpan.org/Public/Bug/Display.html?id=92462
Comment 3 Michael Pyne 2014-01-26 05:12:37 UTC
Git commit 316a1b3361382ed5f460b673637dfc0c964934e1 by Michael Pyne.
Committed on 26/01/2014 at 05:03.
Pushed by mpyne into branch 'master'.

cmdline: Restore support for arbitrary global option handling.

The recent port to Getopt::Long broke the ability to use --foo=bar type
of options (where <foo> is a global option name known to the build
context). It also replaced the --module,foo=bar options with
--set-module-option-value=module,foo,bar.

While it's possible to use the latter syntax for global options (by
using 'global' as the module name) that is undocumented and may not work
forever. And either way, --foo options did use to work, and I noted it
was broken in the refactor.

So now that someone else has noticed I've reimplemented the feature.
It's difficult to do entirely from within Getopt::Long since the
documentation for that module gives you essentially one catch-all, which
only supports *non-options*.

So what I've done instead is to have kdesrc-build dynamically introspect
its list of global options and flags and then add them to the list of
valid options we pass to Getopt::Long. This also should mean that we
don't need to pass 'pass_through' as an option to Getopt::Long anymore,
though we'll see.

This code path won't be used for options that already have a command
line option (such as --async/--no-async) so that is still a misfeature
compared to how it was before, but I guess it can't be perfect. =D

I've tried to ensure that "flags" support the 'false' value to mean
boolean false, but be careful to pass false or 0 if that's what you
mean... specifying --dont-foo without giving it a value defaults it to
true.

M  +44   -12   modules/ksb/Application.pm
M  +1    -1    modules/ksb/Updater/Svn.pm

http://commits.kde.org/kdesrc-build/316a1b3361382ed5f460b673637dfc0c964934e1
Comment 4 Michael Pyne 2014-01-26 05:22:26 UTC
As mentioned in the commit log I went a different way than using <> (since I didn't think <> supported anything that even *looked* like an option, or at least it I don't remember it doing so when I did the refactoring last month).

I'm very impressed they responded so quickly to the bug report though.

Please let me know if there's something still not working (which doesn't already have its own command-line option, that is).

For things that *do* have their own command line option, you can theoretically use --set-module-value-option with a module of 'global' and kdesrc-build will blindly apply the change... ;)