bernsteinbear.com
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1#!/usr/bin/env python3
2class Gen:
3 def __init__(self, stream):
4 self.stream = stream
5
6 def writeline(self, line):
7 self.stream.write(line)
8 self.stream.write("\n")
9
10 def rule(self, name, **kwargs):
11 self.writeline(f"rule {name}")
12 if "description" not in kwargs:
13 kwargs["description"] = f"{name} $out"
14 for key, value in kwargs.items():
15 self.writeline(f" {key} = {value}")
16 self.writeline("")
17
18 def var(self, name, value):
19 self.writeline(f"{name} = {value}")
20
21 def __getattr__(self, name):
22 def rule(output, input):
23 self.writeline(f"build {output}: {name} {input}")
24
25 return rule
26
27
28def remove_ext(name):
29 return name.rpartition(".")[0]
30
31
32CC = "gcc"
33CFLAGS = "-O0 -g -Wall -Wextra -pedantic -fno-strict-aliasing -std=c99"
34OUTDIR = "bin"
35SRCS = [
36 "mmap-demo.c",
37 "compiling-integers.c",
38 "compiling-immediates.c",
39 "compiling-unary.c",
40 "compiling-binary.c",
41 "compiling-reader.c",
42 "compiling-let.c",
43 "compiling-if.c",
44 "compiling-heap.c",
45 "compiling-procedures.c",
46 "compiling-closures.c",
47 "compiling-elf.c",
48]
49NINJA = "build.ninja"
50BINS = {src: f"./{OUTDIR}/{remove_ext(src)}" for src in SRCS}
51
52with open(NINJA, "w+") as f:
53 g = Gen(f)
54 g.var("CC", CC)
55 g.var("CFLAGS", CFLAGS)
56 g.rule("CC", command="$CC $CFLAGS ${opts} $in -o $out")
57 g.rule(
58 "REGEN",
59 command=f"python3 {__file__}",
60 description="Regenerating build.ninja...",
61 )
62
63 for src in SRCS:
64 g.CC(BINS[src], src)
65
66 g.REGEN(NINJA, f"| {__file__}")
67 g.phony("all", " ".join(BINS.values()))
68 g.writeline("default all")