v.pkgconfig

This module implements the pkg-config tool as a library in pure V.

Features:

• Simple API, but still not stable, but shouldn't change much
• Runs 2x faster than original pkg-config
• Commandline tool that aims to be compatible with pkg-config
• Resolve full path for .pc file given a name
• Recursively parse all the dependencies
• Find and replace all inner variables
• Integration with V, so you can just do #pkgconfig r_core

Todo/Future/Wish:

• 100% compatibility with pkg-config options
• Stricter pc parsing logic, with better error reporting

Example

The commandline tool is available in vlib/v/pkgconfig/bin/pkgconfig.v

$ ./bin/pkgconfig -h
pkgconfig 0.3.3
-----------------------------------------------
Usage: pkgconfig [options] [ARGS]

Options:
  -V, --modversion          show version of module
  -d, --description         show pkg module description
  -h, --help                show this help message
  -D, --debug               show debug information
  -l, --list-all            list all pkgmodules
  -e, --exists              return 0 if pkg exists
  -V, --print-variables     display variable names
  -r, --print-requires      display requires of the module
  -a, --atleast-version <string>
                            return 0 if pkg version is at least the given one
      --exact-version <string>
                            return 0 if pkg version is at least the given one
  -v, --version             show version of this tool
  -c, --cflags              output all pre-processor and compiler flags
  -I, --cflags-only-I       show only -I flags from CFLAGS
      --cflags-only-other   show cflags without -I
  -s, --static              show --libs for static linking
  -l, --libs                output all linker flags
      --libs-only-l         show only -l from ldflags
  -L, --libs-only-L         show only -L from ldflags
      --libs-only-other     show flags not containing -l or -L
$

Using the API in your own programs:

import v.pkgconfig

opt := pkgconfig.Options{}
mut pc := pkgconfig.load('expat', opt) or { panic(err) }
println(pc.libs)

... will produce something like this:

['-L/usr/lib/x86_64-linux-gnu', '-lexpat']

fn atleast(v string) bool

fn list() []string

fn load(pkgname string, options Options) !&PkgConfig

fn main(args []string) !&Main

struct Main {
pub mut:
	opt         &MainOptions = unsafe { nil }
	res         string
	has_actions bool
}

fn (mut m Main) run() !string

struct Options {
pub:
	path              string
	debug             bool
	norecurse         bool
	only_description  bool
	use_default_paths bool = true
}

struct PkgConfig {
pub mut:
	options          Options
	name             string
	modname          string
	url              string
	version          string
	description      string
	libs             []string
	libs_private     []string
	cflags           []string
	paths            []string // TODO: move to options?
	vars             map[string]string
	requires         []string
	requires_private []string
	conflicts        []string
	loaded           []string
}

fn (mut pc PkgConfig) atleast(v string) bool

fn (mut pc PkgConfig) extend(pcdep &PkgConfig) !string