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use std::{borrow::Cow, collections::HashMap};
pub use error::*;
mod error;
#[cfg(target_os = "linux")]
pub const DEFAULT_SECTION_NAME: &str = ".emboss_meta";
#[cfg(target_os = "macos")]
pub const DEFAULT_SECTION_NAME: &str = "__emboss_meta";
const IDENT_END: u8 = b'=';
const VALUE_END: u8 = b'\0';
pub fn extract_metadata(buf: &[u8]) -> Result<HashMap<Cow<str>, Cow<str>>, EmbossError> {
let mut metadata = HashMap::new();
let mut ident = None;
let mut start = 0;
let mut parsing_ident = true;
for (i, c) in buf.iter().enumerate() {
match c {
&IDENT_END if parsing_ident => {
let raw_ident = String::from_utf8_lossy(&buf[start..i]);
if raw_ident.trim().is_empty() {
return Err(EmbossError::MissingIdent);
}
ident = Some(raw_ident);
start = i + 1;
parsing_ident = false;
}
&VALUE_END if parsing_ident => {
return Err(EmbossError::UnexpectedValueEnd);
}
&VALUE_END => {
let ident = ident.take().expect("we should have an ident by now");
let value = String::from_utf8_lossy(&buf[start..i]);
metadata.insert(ident, value);
start = i + 1;
parsing_ident = true;
}
_ => {}
}
}
Ok(metadata)
}
#[macro_export]
macro_rules! emboss {
(groups=$($group: ident),+) => {
$(
emboss!(group=$group);
)+
};
(group=build) => {
emboss!(VERGEN_BUILD_DATE);
emboss!(VERGEN_BUILD_TIME);
emboss!(VERGEN_BUILD_TIMESTAMP);
emboss!(VERGEN_BUILD_SEMVER);
};
(group=git) => {
emboss!(VERGEN_GIT_BRANCH);
emboss!(VERGEN_GIT_COMMIT_DATE);
emboss!(VERGEN_GIT_COMMIT_TIME);
emboss!(VERGEN_GIT_COMMIT_TIMESTAMP);
emboss!(VERGEN_GIT_SEMVER);
emboss!(VERGEN_GIT_SEMVER_LIGHTWEIGHT);
emboss!(VERGEN_GIT_SHA);
emboss!(VERGEN_GIT_SHA_SHORT);
};
(group=rustc) => {
emboss!(VERGEN_RUSTC_CHANNEL);
emboss!(VERGEN_RUSTC_COMMIT_DATE);
emboss!(VERGEN_RUSTC_COMMIT_HASH);
emboss!(VERGEN_RUSTC_HOST_TRIPLE);
emboss!(VERGEN_RUSTC_LLVM_VERSION);
emboss!(VERGEN_RUSTC_SEMVER);
};
(group=cargo) => {
emboss!(VERGEN_CARGO_FEATURES);
emboss!(VERGEN_CARGO_PROFILE);
emboss!(VERGEN_CARGO_TARGET_TRIPLE);
};
(group=rust) => {
emboss!(groups=rustc,cargo);
};
(group=sysinfo) => {
emboss!(VERGEN_SYSINFO_NAME);
emboss!(VERGEN_SYSINFO_OS_VERSION);
emboss!(VERGEN_SYSINFO_USER);
emboss!(VERGEN_SYSINFO_TOTAL_MEMORY);
emboss!(VERGEN_SYSINFO_CPU_VENDOR);
emboss!(VERGEN_SYSINFO_CPU_CORE_COUNT);
emboss!(VERGEN_SYSINFO_CPU_NAME);
emboss!(VERGEN_SYSINFO_CPU_BRAND);
emboss!(VERGEN_SYSINFO_CPU_FREQUENCY);
};
(group=all) => {
emboss!(groups=build,git,rustc,cargo,sysinfo);
};
(group=rsps) => {
emboss!(VERGEN_BUILD_TIMESTAMP);
emboss!(VERGEN_BUILD_SEMVER);
emboss!(VERGEN_RUSTC_SEMVER);
emboss!(VERGEN_CARGO_PROFILE);
emboss!(VERGEN_CARGO_FEATURES);
};
($var_name: ident) => {
#[cfg(target_os = "linux")]
emboss!($var_name, ".emboss_meta");
#[cfg(target_os = "macos")]
emboss!($var_name, "__DATA,__emboss_meta");
};
($var_name: ident, $section_name: expr) => {
emboss!($var_name, $section_name, env!(stringify!($var_name)));
};
($var_name: ident, $section_name: expr, $value: expr) => {
mod $var_name {
type DataPtr = *const [u8; STRUCTURED.as_bytes().len()];
type Data = [u8; STRUCTURED.as_bytes().len()];
const STRUCTURED: &str = concat!(stringify!($var_name), "=", $value, "\0");
#[used]
#[link_section = $section_name]
static EMBOSSED: Data = unsafe {
*std::mem::transmute::<DataPtr, &Data>(STRUCTURED.as_ptr() as DataPtr)
};
}
};
() => {
emboss!(group=rsps);
};
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn extract_basic() {
let data = "key=value\0";
let metadata = extract_metadata(data.as_bytes()).unwrap();
let value = metadata.get("key").unwrap();
assert_eq!(value, "value")
}
#[test]
fn extract_with_eq_sign_in_value() {
let data = "expr=2+2=4\0";
let metadata = extract_metadata(data.as_bytes()).unwrap();
let value = metadata.get("expr").unwrap();
assert_eq!(value, "2+2=4")
}
#[test]
fn extract_fail_on_unfinished_ident() {
let data = "expr\0";
if let Err(error) = extract_metadata(data.as_bytes()) {
return assert_eq!(error, EmbossError::UnexpectedValueEnd);
}
assert!(false, "expected an error to be returned")
}
#[test]
fn extract_fail_blank_ident() {
let data = "=foo";
if let Err(error) = extract_metadata(data.as_bytes()) {
return assert_eq!(error, EmbossError::MissingIdent);
}
assert!(false, "expected an error to be returned")
}
#[test]
fn extract_fail_blank_ident_with_spaces() {
let data = " =foo";
if let Err(error) = extract_metadata(data.as_bytes()) {
return assert_eq!(error, EmbossError::MissingIdent);
}
assert!(false, "expected an error to be returned")
}
}