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Skip writing descriptors if unchanged

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This commit is contained in:
Damien Elmes 2023-06-15 17:06:36 +10:00
parent 9701055eb5
commit f4fca1f5fd
1 changed files with 8 additions and 6 deletions
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14
rslib/proto/rust.rs
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@ -3,12 +3,12 @@
use std::env; use std::env;
use std::fmt::Write; use std::fmt::Write;
use std::fs;
use std::path::Path; use std::path::Path;
use std::path::PathBuf; use std::path::PathBuf;
use anki_io::create_dir_all; use anki_io::create_dir_all;
use anki_io::read_file; use anki_io::read_file;
use anki_io::write_file_if_changed;
use anyhow::Context; use anyhow::Context;
use anyhow::Result; use anyhow::Result;
use prost_build::ServiceGenerator; use prost_build::ServiceGenerator;
@ -24,9 +24,10 @@ pub fn write_backend_proto_rs(descriptors_path: &Path) -> Result<DescriptorPool>
.parent() .parent()
.context("missing parent of descriptor")?, .context("missing parent of descriptor")?,
)?; )?;
let tmp_descriptors = out_dir.join("descriptors.tmp");
prost_build::Config::new() prost_build::Config::new()
.out_dir(&out_dir) .out_dir(&out_dir)
.file_descriptor_set_path(descriptors_path) .file_descriptor_set_path(&tmp_descriptors)
.service_generator(RustCodeGenerator::boxed()) .service_generator(RustCodeGenerator::boxed())
.type_attribute( .type_attribute(
"Deck.Filtered.SearchTerm.Order", "Deck.Filtered.SearchTerm.Order",
@ -53,11 +54,12 @@ pub fn write_backend_proto_rs(descriptors_path: &Path) -> Result<DescriptorPool>
.compile_protos(paths.as_slice(), &[proto_dir]) .compile_protos(paths.as_slice(), &[proto_dir])
.context("prost build")?; .context("prost build")?;
write_service_index(&out_dir, descriptors_path) let descriptors = read_file(&tmp_descriptors)?;
write_file_if_changed(descriptors_path, &descriptors)?;
write_service_index(&out_dir, descriptors)
} }
fn write_service_index(out_dir: &Path, descriptors_path: &Path) -> Result<DescriptorPool> { fn write_service_index(out_dir: &Path, descriptors: Vec<u8>) -> Result<DescriptorPool> {
let descriptors = read_file(descriptors_path)?;
let pool = let pool =
DescriptorPool::decode(descriptors.as_ref()).context("unable to decode descriptors")?; DescriptorPool::decode(descriptors.as_ref()).context("unable to decode descriptors")?;
let mut buf = String::new(); let mut buf = String::new();
@ -80,7 +82,7 @@ pub enum ServiceIndex {{"
} }
writeln!(buf, "}}").unwrap(); writeln!(buf, "}}").unwrap();
fs::write(out_dir.join("service_index.rs"), buf).context("failed to write service index")?; write_file_if_changed(out_dir.join("service_index.rs"), buf)?;
Ok(pool) Ok(pool)
} }