unleashed-firmware/site_scons/environ.scons

import SCons
from SCons.Platform import TempFileMunge
from fbt import util

import os
import multiprocessing

Import("VAR_ENV")

forward_os_env = {
    # Import PATH from OS env - scons doesn't do that by default
    "PATH": os.environ["PATH"],
}
# Proxying CI environment to child processes & scripts
variables_to_forward = [
    "WORKFLOW_BRANCH_OR_TAG",
    "DIST_SUFFIX",
    "HOME",
    "APPDATA",
    "PYTHONHOME",
    "PYTHONNOUSERSITE",
    "TMP",
    "TEMP",
]
if proxy_env := GetOption("proxy_env"):
    variables_to_forward.extend(proxy_env.split(","))

for env_value_name in variables_to_forward:
    if environ_value := os.environ.get(env_value_name, None):
        forward_os_env[env_value_name] = environ_value


coreenv = VAR_ENV.Clone(
    tools=[
        (
            "crosscc",
            {
                "toolchain_prefix": "arm-none-eabi-",
                "versions": VAR_ENV["FBT_TOOLCHAIN_VERSIONS"],
            },
        ),
        "python3",
        "sconsmodular",
        "sconsrecursiveglob",
        "ccache",
    ],
    TEMPFILE=TempFileMunge,
    MAXLINELENGTH=2048,
    PROGSUFFIX=".elf",
    ENV=forward_os_env,
)

# If DIST_SUFFIX is set in environment, is has precedence (set by CI)
if os_suffix := os.environ.get("DIST_SUFFIX", None):
    coreenv.Replace(
        DIST_SUFFIX=os_suffix,
    )

# print(coreenv.Dump())
if not coreenv["VERBOSE"]:
    coreenv.SetDefault(
        CCCOMSTR="\tCC\t${SOURCE}",
        CXXCOMSTR="\tCPP\t${SOURCE}",
        ASCOMSTR="\tASM\t${SOURCE}",
        ARCOMSTR="\tAR\t${TARGET}",
        RANLIBCOMSTR="\tRANLIB\t${TARGET}",
        LINKCOMSTR="\tLINK\t${TARGET}",
        INSTALLSTR="\tINSTALL\t${TARGET}",
        APPSCOMSTR="\tAPPS\t${TARGET}",
        VERSIONCOMSTR="\tVERSION\t${TARGET}",
        STRIPCOMSTR="\tSTRIP\t${TARGET}",
        OBJDUMPCOMSTR="\tOBJDUMP\t${TARGET}",
        # GDBCOMSTR="\tGDB\t${SOURCE}",
        # GDBPYCOMSTR="\tGDB-PY\t${SOURCE}",
    )

# Default value for commandline options

SetOption("num_jobs", multiprocessing.cpu_count())
# Avoiding re-scan of all sources on every startup
SetOption("implicit_cache", True)
SetOption("implicit_deps_unchanged", True)
# More aggressive caching
SetOption("max_drift", 1)
# Random task queue - to discover isses with build logic faster
# SetOption("random", 1)


# Setting up temp file parameters - to overcome command line length limits
coreenv["TEMPFILEARGESCFUNC"] = util.tempfile_arg_esc_func
util.wrap_tempfile(coreenv, "LINKCOM")
util.wrap_tempfile(coreenv, "ARCOM")

coreenv["SINGLEQUOTEFUNC"] = util.single_quote

Return("coreenv")