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refactor: include comments & rustdoc

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This commit is contained in:
Erica Marigold 2024-03-14 18:35:45 +05:30
parent a40d267d2b
commit 1c0bb47fa5
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1 changed files with 15 additions and 1 deletions
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16
src/cli/build.rs
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@ -41,9 +41,13 @@ pub struct BuildCommand {
#[clap(short, long)]
pub output: Option<PathBuf>,
/// The target to compile for - defaults to the host triple
#[clap(short, long)]
pub target: Option<String>,
/// The path to the base executable to use - defaults to
/// the currently running executable, used for cross-compilation
/// for targets not directly supported
#[clap(short, long)]
pub base: Option<PathBuf>,
}
@ -109,6 +113,7 @@ impl BuildCommand {
}
}
/// Wrapper function to asynchronously create a file at the given path with the given contents and permissions
async fn write_file_to(
path: impl AsRef<Path>,
bytes: impl AsRef<[u8]>,
@ -147,6 +152,7 @@ pub enum BasePathDiscoveryError<T> {
None,
}
/// Discovers the path to the base executable to use for cross-compilation
async fn get_base_exe_path(
base: Option<PathBuf>,
target: Option<String>,
@ -173,12 +179,14 @@ async fn get_base_exe_path(
target_exe_extension
});
// Create the target base directory in the lune home if it doesn't already exist
if !TARGET_BASE_DIR.exists() {
fs::create_dir_all(TARGET_BASE_DIR.to_path_buf())
.await
.map_err(BasePathDiscoveryError::IoError)?;
}
// If a cached target base executable doesn't exist, attempt to download it
if !path.exists() {
println!("Requested target hasn't been downloaded yet, attempting to download");
@ -200,7 +208,8 @@ async fn get_base_exe_path(
target_full_display
);
// Maybe we should use the custom net client used in `@lune/net`
// FIXME: Maybe we should use the custom net client used in `@lune/net`
// Request the precompiled target from GitHub releases
let resp = reqwest::get(release_url).await.map_err(|err| {
eprintln!(
" {} Unable to download base binary found for target `{}`",
@ -228,6 +237,9 @@ async fn get_base_exe_path(
.into());
}
// Wrap the request response in bytes so that we can decompress it, since `async_zip`
// requires the underlying reader to implement `AsyncRead` and `Seek`, which `Bytes`
// doesn't implement
let compressed_data = Cursor::new(
resp.bytes()
.await
@ -235,6 +247,7 @@ async fn get_base_exe_path(
.to_vec(),
);
// Construct a decoder and decompress the ZIP file using deflate
let mut decoder = ZipFileReader::new(compressed_data.compat())
.await
.map_err(BasePathDiscoveryError::Decompression)?;
@ -250,6 +263,7 @@ async fn get_base_exe_path(
.await
.map_err(BasePathDiscoveryError::Decompression)?;
// Finally write the decompressed data to the target base directory
write_file_to(&path, decompressed, 0o644)
.await
.map_err(BasePathDiscoveryError::IoError)?;