unleashed-firmware/site_scons/environ.scons

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import multiprocessing
import os
from fbt.util import (
FORWARDED_ENV_VARIABLES,
PosixPathWrapper,
resolve_real_dir_node,
single_quote,
tempfile_arg_esc_func,
wrap_tempfile,
)
from SCons.Platform import TempFileMunge
Import("VAR_ENV")
forward_os_env = {
# Import PATH from OS env - scons doesn't do that by default
"PATH": os.environ["PATH"],
}
variables_to_forward = list(FORWARDED_ENV_VARIABLES)
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=[
"fbt_tweaks",
(
"crosscc",
{
"toolchain_prefix": "arm-none-eabi-",
"versions": VAR_ENV["FBT_TOOLCHAIN_VERSIONS"],
},
),
"python3",
"sconsmodular",
"sconsrecursiveglob",
"ccache",
],
TEMPFILE=TempFileMunge,
POSIXPATH=PosixPathWrapper,
MAXLINELENGTH=2048,
PROGSUFFIX=".elf",
ENV=forward_os_env,
SINGLEQUOTEFUNC=single_quote,
ABSPATHGETTERFUNC=resolve_real_dir_node,
# Setting up temp file parameters - to overcome command line length limits
TEMPFILEARGESCFUNC=tempfile_arg_esc_func,
ROOT_DIR=Dir("#"),
FBT_SCRIPT_DIR=Dir("#/scripts"),
)
# 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,
)
# Default value for commandline options
SetOption("num_jobs", multiprocessing.cpu_count())
## NB - disabled both caches since they seem to do more harm then good in our case
# 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)
wrap_tempfile(coreenv, "LINKCOM")
wrap_tempfile(coreenv, "ARCOM")
Return("coreenv")