source: tests/pybin/settings.py

import os
import subprocess
import sys
from . import tools

global original_path

try :
        original_path = os.getcwd()
        testpath = os.path.dirname(os.path.abspath(os.path.join(os.getcwd(), sys.argv[0])))
        sys.path.append(testpath)
        import config

        SRCDIR = os.path.abspath(config.SRCDIR)
        BUILDDIR = os.path.abspath(config.BUILDDIR)
        distribute = config.DISTRIBUTE
        os.chdir(testpath)

except:
        print('ERROR: missing config.py, re-run configure script.', file=sys.stderr)
        sys.exit(1)

class Architecture:
        KnownArchitectures = {
                'x64'         : 'x64',
                'x86-64'      : 'x64',
                'x86_64'      : 'x64',
                'x86'         : 'x86',
                'aarch64'     : 'arm64',
                'arm64'       : 'arm64',
                'ARM64'       : 'arm64',
                'i386'        : 'x86',
                'i486'        : 'x86',
                'i686'        : 'x86',
                'Intel 80386' : 'x86',
                'arm'         : 'arm32',
                'ARM'         : 'arm32',
                'arm32'       : 'arm32',
                'ARM32'       : 'arm32',
        }

        CrossCompileFlags = {
                'x64'  : 'ARCH_FLAGS=-m64',
                'x86'  : 'ARCH_FLAGS=-m32',
                'arm64': 'ARCH_FLAGS=',
                'arm32': 'ARCH_FLAGS=',
        }

        def __init__(self, arch):
                try:
                        canonical_host = Architecture.make_canonical( config.HOSTARCH )
                except KeyError:
                        print("Unknown host architecture %s" % config.HOSTARCH, file=sys.stderr)
                        sys.exit(1)

                if arch:
                        try:
                                arch = Architecture.make_canonical( arch )
                        except KeyError:
                                print("Unknown architecture %s" % arch, file=sys.stderr)
                                sys.exit(1)

                if arch and arch != canonical_host:
                        self.target = arch
                        self.cross_compile = True
                else:
                        self.target = canonical_host
                        self.cross_compile = False


                try :
                        self.flags = Architecture.CrossCompileFlags[self.target]
                except KeyError:
                        print("Cross compilation not available for architecture %s" % self.target, file=sys.stderr)
                        sys.exit(1)

                self.string = self.target

        def update(self):
                if not self.cross_compile:
                        self.target = machine_default()
                        self.string = self.target
                        print("updated to %s" % self.target)

        def filter(self, tests):
                return [test for test in tests if not test.arch or self.target == test.arch]

        @staticmethod
        def make_canonical(arch):
                return Architecture.KnownArchitectures[arch]


class Debug:
        def __init__(self, value):
                self.string = "debug" if value else "no debug"
                self.flags  = """DEBUG_FLAGS=%s""" % ("-debug -O0" if value else "-nodebug -O2")
                self.path   = "debug" if value else "nodebug"

class Install:
        def __init__(self, value):
                if value:
                        distribute = False

                self.string = "installed" if value else "in tree"
                self.flags  = """installed=%s""" % ("yes" if value else "no")

class Timeouts:
        def __init__(self, ts, tg):
                self.single = Timeouts.check(ts)
                self.total  = Timeouts.check(tg)

        @staticmethod
        def check(value):
                if value < 1:
                        print("Timeouts must be at least 1 second", file=sys.stderr)
                        sys.exit(1)

                return value

def init( options ):
        global all_arch
        global all_debug
        global all_install
        global arch
        global debug
        global archive
        global install
        global invariant

        global continue_
        global dry_run
        global generating
        global make
        global make_jobfds
        global output_width
        global timeout
        global timeout2gdb

        all_arch     = [Architecture(o) for o in list(dict.fromkeys(options.arch   ))] if options.arch else [Architecture(None)]
        all_debug    = [Debug(o)        for o in list(dict.fromkeys(options.debug  ))]
        all_install  = [Install(o)      for o in list(dict.fromkeys(options.install))]
        archive      = os.path.abspath(os.path.join(original_path, options.archive_errors)) if options.archive_errors else None
        invariant    = options.invariant
        continue_    = options.continue_
        dry_run      = options.dry_run # must be called before tools.config_hash()
        generating   = options.regenerate_expected
        make         = ['make']
        make_jobfds  = []
        output_width = 24
        timeout      = Timeouts(options.timeout, options.global_timeout)
        timeout2gdb  = options.timeout_with_gdb

        # if we distribute, distcc errors will fail tests, use log file for distcc
        # don't use "'DISTCC_LOG' not in os.environ" because it can be set to ''
        if distribute and not os.environ.get('DISTCC_LOG'):
                os.putenv('DISTCC_LOG', os.path.join(BUILDDIR, 'distcc_error.log'))

def update_make_cmd(flags):
        global make
        make = ['make', *flags]

def update_make_fds(r, w):
        global make_jobfds
        make_jobfds = (r, w)

def validate():
        """Validate the current configuration and update globals"""

        global distcc
        distcc       = "DISTCC_CFA_PATH=~/.cfadistcc/%s/cfa" % tools.config_hash()
        make_ret, out, err = tools.make( ".validate", output_file=subprocess.PIPE, error=subprocess.PIPE )
        if make_ret != 0:
                print("ERROR: Invalid configuration %s:%s" % (arch.string, debug.string), file=sys.stderr)
                print("       verify returned : \n%s" % err, file=sys.stderr)
                sys.exit(1)

def prep_output(tests):
        global output_width
        output_width = max(map(lambda t: len(t.target()), tests))
        # 35 is the maximum width of the name field before we get line wrapping.
        output_width = min(output_width, 35)