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embed.py: from dasmig-core (dasmig/dasmig-core#11) #20

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Merged
dasmig merged 1 commit into from
Nov 1, 2026
Merged

embed.py: from dasmig-core (dasmig/dasmig-core#11) #20

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19 changes: 14 additions & 5 deletions scripts/embed.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,10 +17,12 @@

Usage:
python embed.py RESOURCES_DIR --tier lite --name biodatagen \
--output dasmig/biodatagen_data.hpp [--include core.hpp] [--chunk-bytes 16000]
--output dasmig/biodatagen_data.hpp [--include core.hpp] [--chunk-bytes 16000] \
[--files a.tsv b.tsv]

Every file below RESOURCES_DIR/<tier>/ is embedded, in sorted order, under
the path "<tier>/<relative path>".
the path "<tier>/<relative path>"; with --files, only those files, so a
library can split its tables between headers behind separate macros.
"""

import argparse
Expand Down Expand Up @@ -89,11 +91,17 @@ def literal_pieces(chunk: bytes):
return pieces


def generate(resources: Path, tier: str, name: str, include: str, chunk_bytes: int) -> str:
def generate(resources: Path, tier: str, name: str, include: str, chunk_bytes: int, only=None) -> str:
root = resources / tier
if not root.is_dir():
raise SystemExit(f"embed.py: {root} is not a directory")
files = sorted(p for p in root.rglob("*") if p.is_file())
if only:
missing = [f for f in only if not (root / f).is_file()]
if missing:
raise SystemExit(f"embed.py: not below {root}: {', '.join(missing)}")
files = sorted(root / f for f in only)
else:
files = sorted(p for p in root.rglob("*") if p.is_file())
if not files:
raise SystemExit(f"embed.py: no files below {root}")

Expand Down Expand Up @@ -149,10 +157,11 @@ def main(argv=None):
parser.add_argument("--output", type=Path, required=True, help="header to write")
parser.add_argument("--include", default="core.hpp", help="how the header includes the core")
parser.add_argument("--chunk-bytes", type=int, default=16000, help="bytes per chunk (default 16000)")
parser.add_argument("--files", nargs="+", help="embed only these files of the tier (default: all)")
args = parser.parse_args(argv)
if not args.name.isidentifier():
raise SystemExit("embed.py: --name must be a C++ identifier")
text = generate(args.resources, args.tier, args.name, args.include, args.chunk_bytes)
text = generate(args.resources, args.tier, args.name, args.include, args.chunk_bytes, args.files)
args.output.write_text(text, encoding="ascii", newline="\n")
print(f"wrote {args.output} ({len(text)} bytes)")

Expand Down
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