nmigen-learning/fpga/__init__.py

__version__ = '0.1.0'

# YOWASP:

def populate_environ_with_yowasp():
    import os, shutil

    for nmigen_envvar, expected_path, alternative_path in [
        ("SBY",           "sby",           "yowasp-sby"),
        ("YOSYS",         "yosys",         "yowasp-yosys"), # nmigen-yosys is handled by nmigen
        ("NEXTPNR_ECP5",  "nextpnr-ecp5",  "yowasp-nextpnr-ecp5"),
        ("NEXTPNR_ICE40", "nextpnr-ice40", "yowasp-nextpnr-ice40"),
        ("NEXTPNR_ICE40", "nextpnr-ice40", "yowasp-nextpnr-ice40"),
        ("ICEBRAM",       "icebram",       "yowasp-icebram"),
        ("ICEMULTI",      "icemulti",      "yowasp-icemulti"),
        ("ICEPACK",       "icepack",       "yowasp-icepack"),
        ("ICEPLL",        "icepll",        "yowasp-icepll"),
        ("ICEUNPACK",     "iceunpack",     "yowasp-iceunpack"),
    ]:
        if nmigen_envvar in os.environ: continue
        if shutil.which(expected_path): continue
        if not shutil.which(alternative_path): continue

        os.environ[nmigen_envvar] = alternative_path

populate_environ_with_yowasp()
del populate_environ_with_yowasp


# dogelang: Slow. Stupid. Absolutely adorable.

import dg # setup the dg import hook
del dg