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Work around unnecessary recompilations of aws-sdk crates

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This commit is contained in:
Heikki Linnakangas
2024-02-09 00:22:13 +02:00
parent 9a31311990
commit 0392e5c933
1 changed files with 22 additions and 0 deletions
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.cargo/config.toml
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@@ -6,3 +6,25 @@ rustdocflags = ["-Arustdoc::private_intra_doc_links"]
[alias]
build_testing = ["build", "--features", "testing"]
neon = ["run", "--bin", "neon_local"]
[env]
# Set AWS_SDK_RUST_BUILD_UA_METADATA to avoid a cargo issue that
# caused recompiling aws-sdk crates every time.
#
# Without this, running "cargo build" would recompile the aws-sdk
# crates every time, even if nothing changed. Cargo fingerprint
# debugging showed this:
#
# $ CARGO_LOG=cargo::core::compiler::fingerprint=info cargo build --features testing --bins
# 0.422450751s INFO cargo::core::compiler::fingerprint: stale: changed env "AWS_SDK_RUST_BUILD_UA_METADATA"
# 0.422465658s INFO cargo::core::compiler::fingerprint: Some("") != None
# ...
#
# That seems bogus. Seems that something in cargo or the build scripts
# is being confused about the variable being set to empty string, or
# not set at all.
#
# To work around that, set the env variable explicitly. That way,
# cargo recognizes it as "not changed"
AWS_SDK_RUST_BUILD_UA_METADATA=""