Wow, *lots* of backends were reliant on Sema doing the heavy lifting for
them. CBE, Wasm, and SPIR-V have all regressed in places now that they
actually need to, like, initialize unions and such.
Changes fmtId to return the FormatId type directly, and renames the
FormatId.render function to FormatId.format, so it can be used in a
format expression directly.
Why? Since `render` is private, you can't create functions that wrap
`fmtId` or `fmtIdFlags`, since you can't name the return type of those
functions outside of std itself.
The current setup _might_ be intentional? In which case I can live with
it, but I figured I'd make a small contrib to upstream zig :)
This eliminates a footgun and special case handling with fixed buffers,
as well as allowing decompression streams to keep a window in the output
buffer.
Not only are `Step.Compile` methods like `linkLibC()` redundant because
`Module` exposes the same APIs, it also might not be immediately obvious
to users that these methods modify the underlying root module, which can
be a footgun and lead to unintended results if the module is exported to
package consumers or shared by multiple compile steps.
Using `compile.root_module.link_libc = true` makes it more clear to
users which of the compile step and the module owns which options.
This passes tests but it doesn't provide as big a window size as is
required to decompress larger streams.
The next commit in this branch will work towards that, without
introducing an additional buffer.
This option never worked properly (it emitted wrongly-formatted code),
and it doesn't seem particularly *useful* -- someone who's proficient
enough with `std.Build` to not need explanations probably just wants to
write their own thing. Meanwhile, the use case of writing your own
`build.zig` was extremely poorly served, because `build.zig.zon` *needs*
to be generated programmatically for a correct `fingerprint`, but the
only ways to do that were to a) do it wrong and get an error, or b) get
the full init template and delete the vast majority of it. Both of these
were pretty clunky, and `-s` didn't really help.
So, replace this flag with a new one, `--minimal`/`-m`, which uses a
different template. This template is trivial enough that I opted to just
hardcode it into the compiler for simplicity. The main job of
`zig init -m` is to generate a correct `build.zig.zon` (if it is unable
to do this, it exits with a fatal error). In addition, it will *attempt*
to generate a tiny stub `build.zig`, with only an `std` import and an
empty `pub fn build`. However, if `build.zig` already exists, it will
avoid overwriting it, and doesn't even complain. This serves the use
case of writing `build.zig` manually and *then* running `zig init -m`
to generate an appropriate `build.zig.zon`.
