Auto merge of #6782 - ehuss:build-script-fingerprint-fixes, r=alexcri…

…chton Fix fingerprint for canceled build script. Fixes #6770. See that issue for a description. The fix is to include the compilation of the build script itself in the fingerprint of the `RunCustomBuild` Unit. This also includes some documentation for how fingerprints work. Also includes a test for docker-style caching of dependencies where timestamps get truncated to the nearest second.
rust-lang · Mar 26, 2019 · 1ebf6ef · 1ebf6ef
2 parents 4cc4337 + a09e295
commit 1ebf6ef
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diff --git a/src/cargo/core/compiler/custom_build.rs b/src/cargo/core/compiler/custom_build.rs
@@ -65,6 +65,7 @@ pub struct BuildScripts {
     pub plugins: BTreeSet<PackageId>,
 }
 
+#[derive(Debug)]
 pub struct BuildDeps {
     pub build_script_output: PathBuf,
     pub rerun_if_changed: Vec<PathBuf>,