1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#!/usr/bin/env python3
DESCRIPTION = """
Usage: admin/all-features-except a,b,c crate
Prints the set of all features declared by the given crate, minus
a, b and c.
The output is decorated with `--no-default-features --features` meaning
it can be used directly with cargo, for example:
$ cargo build $(admin/all-features-except std,logging rustls)
It is assumed but not verified that the remaining features do not
have dependencies on the disabled features (otherwise, cargo will
re-enable them without notification).
"""
import subprocess
import argparse
import json
def crate_features(crate_name):
js = json.loads(
subprocess.check_output(
["cargo", "metadata", "--no-deps", "--format-version=1"]
)
)
package = [p for p in js["packages"] if p["name"] == crate_name]
if len(package) != 1:
raise ValueError(f"crate {crate_name} not found in {js}")
return set(package[0]["features"].keys())
if __name__ == "__main__":
ap = argparse.ArgumentParser(description=DESCRIPTION)
ap.add_argument(
dest="except_features",
metavar="FEATURE,FEATURE,..",
type=lambda x: set(x.strip().split(",")),
help="Which features to remove from the complete set of features",
)
ap.add_argument("crate", help="Which crate to determine features for")
opts = ap.parse_args()
features = crate_features(opts.crate)
for f in opts.except_features:
try:
features.remove(f)
except KeyError as e:
ap.error(f"feature `{f}' not found (known are {features})")
# drop default, as it may re-enable other features
features.discard("default")
print("--no-default-features", "--features", ",".join(sorted(features)))
|
