Improvements to StringList config handling.#7891
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Looks like an improvement. |
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Improvements to StringList config handling. `StringList` was using an untagged enum to deserialize a string or list. Unfortunately, serde does not handle untagged enums very well. The error messages are not very good, and it doesn't interact with untyped deserializers (like our environment variables). This switches it to a newtype struct, and then has hard-coded support for it in the deserializer. This fixes some deserialization errors (like treating `true` as a boolean) and provides better error messages. `StringList` is currently used for `build.rustflags`, `target.*.rustflags`, and `target.*.runner`. Fixes #7780 Fixes #7781
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Update cargo 9 commits in 3c53211c3d7fee4f430f170115af5baad17a3da9..e02974078a692d7484f510eaec0e88d1b6cc0203 2020-02-07 15:35:03 +0000 to 2020-02-18 15:24:43 +0000 - Set an environment variable for tests to find executables. (rust-lang/cargo#7697) - Rework internal errors. (rust-lang/cargo#7896) - Improvements to StringList config handling. (rust-lang/cargo#7891) - Add new/old rustflags to fingerprint log. (rust-lang/cargo#7890) - Fix inaccurate doc comment on `env_args`. (rust-lang/cargo#7889) - Add some extra fingerprint debug information. (rust-lang/cargo#7888) - Link the licenses into crates/cargo-platform (rust-lang/cargo#7886) - Modify test to make `rustc` PR mergeable (rust-lang/cargo#7883) - Keep environment variables in a BTreeMap to preserve sort order (rust-lang/cargo#7877)
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StringListwas using an untagged enum to deserialize a string or list. Unfortunately, serde does not handle untagged enums very well. The error messages are not very good, and it doesn't interact with untyped deserializers (like our environment variables). This switches it to a newtype struct, and then has hard-coded support for it in the deserializer. This fixes some deserialization errors (like treatingtrueas a boolean) and provides better error messages.StringListis currently used forbuild.rustflags,target.*.rustflags, andtarget.*.runner.Fixes #7780
Fixes #7781