This set of scripts allows to build any package from Conan Center Index (CCI) with
custom compilers, options, and patches.

Here are a few repositories where these scripts are used:
https://github.com/qtwebkit/conan-icu
https://github.com/qtwebkit/conan-libxml2
https://github.com/qtwebkit/conan-openssl

build.py
--------

This is the core of this system. It's a wrapper for ConanMultiPackager which:

1. Provides project-specific defaults for Conan environment variables, like
CONAN_USERNAME etc. They are hardcoded and you need to change them if you want
to reuse the script.

2. Allows passing --shared and --static options, allowing to build only one
kind of packages when needed (or when they need different options).

3. Reads input file "build.cfg" from $PWD. It's expected to be in the root of
package-specific repository having conan-shared-scripts as its submodule.
Current structure of build.cfg:

    [package]
    name = somepackage    ; name used in CCI is expected here
    version = 1.0         ; version must be available in CCI recipe, or patched in
    recipe_subdir = "dir" ; usual path of recipe in CCI looks like
                          ; "resipes/somepackage/all/conanfile.py",
                          ; use this option if you need to replace "all" segment
                          ; to something else
    [conan_options]
    somepackage:someoption = True
    ; list of options in the same format as in [options] section of conanfile.txt

4. All patches from "patches" directory are applied to the root of CCI repository
before starting build. Lexicographical ordering is used, so start file names with
prefixes like "01-", "02-" etc. if you need to enforce certain order.

generate-readme.pl
-----------------

Produces README.md from template using values from build.cfg. Adds build status
icons for AppVeyor and GitHub actions if target repository contains appveyor.yml
and .github/workflows/conan.yml respectively. Also adds template LICENSE file.