max / shop

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1	//! Cut the bundled face, rather than commit one.
2	//!
3	//! The house face is cut from a pinned base by `quasi-type`, and cutting it
4	//! here is what keeps the glyph set and the shipped face from drifting apart: a
5	//! face in the repo would be a second source of truth that nothing rebuilds.
6	//!
7	//! The base is downloaded once into `OUT_DIR` and checksummed against
8	//! `quasi-type`'s pins, so a warm target directory needs no network.
9	//!
10	//! A cold one reaches raw.githubusercontent.com, which rate-limits by IP and
11	//! can fail a container image build. `QUASI_TYPE_MIRROR` in the environment
12	//! names a base URL that is tried first, with the pinned url as the fallback;
13	//! every file is addressed under it by the sha256 the pin already carries, so a
14	//! mirror is a second source rather than a second thing to trust. Nothing here
15	//! reads it: it is `quasi-type`'s own knob, and setting it is what lets a build
16	//! host cover this fetch without shop changing.
17
18	fn main() {
19	println!("cargo:rerun-if-changed=build.rs");
20
21	let out = std::path::PathBuf::from(std::env::var("OUT_DIR").expect("cargo sets OUT_DIR"));
22	// cut_native writes the ttf and the OFL text and hands back what has to be
23	// exported beside them.
24	let written = match quasi_type::cut_native(
25	&out,
26	&out.join("bases"),
27	false,
28	&[("quasi-mono", "face.ttf")],
29	) {
30	Ok(written) => written,
31	Err(e) => panic!(
32	"could not cut the bundled face: {e}\n\
33	The base is fetched from its pinned url on the first build and cached in \
34	OUT_DIR after that, so this needs network once per target directory."
35	),
36	};
37	let face = written
38	.first()
39	.unwrap_or_else(\|\| panic!("quasi-mono cut no faces"));
40
41	// Both paths come back from cut_native rather than being spelled again here:
42	// the licence file is named for the family (`OFL-QuasiMono.txt`), and a
43	// second spelling of that is a rename away from a build failure.
44	println!("cargo:rustc-env=SHOP_FONT_FACE={}", face.path.display());
45	println!(
46	"cargo:rustc-env=SHOP_FONT_LICENSE={}",
47	face.license_path.display()
48	);
49	println!("cargo:rustc-env=SHOP_FONT_FAMILY={}", face.family);
50	println!("cargo:rustc-env=SHOP_FONT_STYLE={}", face.style);
51	// The style is the base's default instance and is not always `Regular`:
52	// Atkinson Mono's is `ExtraLight`, which is the whole reason shop names a
53	// weight when it renders rather than taking what the file opens at.
54	println!(
55	"cargo:rustc-env=SHOP_FONT_DEFAULT_WEIGHT={}",
56	face.default_weight
57	);
58	}
59