32 lines
1.2 KiB
Rust
32 lines
1.2 KiB
Rust
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use std::{io, path::Path};
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// BODGY
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//
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// * As a part of the build process, we need to replace the fake GUID in our
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// tracing lib with the real one.
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// * This build script here will take the value out of the env var
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// MAGIC_TRACING_GUID, and replace the fake GUID in the events_template.rs
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// file with that one.
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// * We'll write that file out to %OUT_DIR%/mangled_events.rs, and then include
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// _that mangled file_ in our lib.rs file.
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fn main() -> io::Result<()> {
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let input = std::fs::read_to_string("src/events_template.rs")?;
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// Is the MAGIC_TRACING_GUID env var set? If it is...
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let output = match std::env::var("MAGIC_TRACING_GUID") {
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Ok(guid) => {
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println!("MAGIC_TRACING_GUID: {}", guid);
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// Replace the fake guid (ffffffff-ffff-ffff-ffff-ffffffffffff) with this one.
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input.replace("ffffffff-ffff-ffff-ffff-ffffffffffff", &guid)
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}
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Err(_) => input,
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};
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let path = Path::new(&std::env::var("OUT_DIR").unwrap()).join("mangled_events.rs");
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println!(
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"cargo:rerun-if-changed={}",
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path.as_path().to_str().unwrap()
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);
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std::fs::write(path.as_path(), output)
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}
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