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Ensure that MSRV tests do not regress

Browse Source 
When testing with older versions of rustc, there's a CI failure mode
when our dependency, which used to be compatible with that Rust version,
publishes a new version which can't be compiled using that old Rust
anymore. That's pretty unfortunate, as that means that third parties can
break our CI without any changes to the code in this repo.

To protect against that, let's use Cargo.lock on CI, but only when
testing against older versions. For stable Rust, we continue to generate
Cargo.lock with freshest dependencies. Implementation wise, we save
known-good Cargo.lock as `Cargo.lock.msrv`, and just copy that in every
relevant CI job.

To get a working `Cargo.lock.msrv`, I run `cargo +nightly
generate-lockfile -Zminimal-versions` -- that is guaranteed to support
the oldest Rust version we can.
This commit is contained in:
Aleksey Kladov 2021-11-16 13:00:59 +03:00
parent 10c2a3b0b4
commit 9735c5f524
2 changed files with 355 additions and 13 deletions
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50
.cirrus.yml
View File

@ -43,6 +43,7 @@ task:
- . $HOME/.cargo/env
- rustup target add i686-unknown-freebsd
- rustup component add --toolchain $TOOLCHAIN clippy
- cp Cargo.lock.msrv Cargo.lock
<< : *TEST
i386_test_script:
- . $HOME/.cargo/env
@ -64,6 +65,7 @@ task:
- sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
- . $HOME/.cargo/env
- rustup component add --toolchain $TOOLCHAIN clippy
- cp Cargo.lock.msrv Cargo.lock
<< : *TEST
before_cache_script: rm -rf $CARGO_HOME/registry/index
@ -116,18 +118,13 @@ task:
- sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
- . $HOME/.cargo/env
- cargo install cross
- cp Cargo.lock.msrv Cargo.lock
<< : *TEST
before_cache_script: rm -rf $CARGO_HOME/registry/index
# Tasks for Linux native builds
task:
matrix:
- name: Rust Stable
container:
image: rust:latest
env:
TARGET: x86_64-unknown-linux-gnu
TOOLCHAIN:
- name: Linux aarch64
arm_container:
image: rust:1.46
@ -144,6 +141,20 @@ task:
image: rust:1.46
env:
TARGET: x86_64-unknown-linux-musl
setup_script:
- rustup target add $TARGET
- rustup component add clippy
- cp Cargo.lock.msrv Cargo.lock
<< : *TEST
before_cache_script: rm -rf $CARGO_HOME/registry/index
task:
name: Rust Stable
container:
image: rust:latest
env:
TARGET: x86_64-unknown-linux-gnu
TOOLCHAIN:
setup_script:
- rustup target add $TARGET
- rustup component add clippy
@ -219,13 +230,26 @@ task:
- name: NetBSD x86_64
env:
TARGET: x86_64-unknown-netbsd
- name: Redox x86_64
env:
TARGET: x86_64-unknown-redox
# Redox requires a nightly compiler.
# If stuff breaks, change nightly to the date at
# https://gitlab.redox-os.org/redox-os/redox/-/blob/master/rust-toolchain
TOOLCHAIN: nightly-2021-06-15
setup_script:
- rustup target add $TARGET
- rustup toolchain install $TOOLCHAIN --profile minimal --target $TARGET
- rustup component add --toolchain $TOOLCHAIN clippy
- cp Cargo.lock.msrv Cargo.lock
<< : *BUILD
before_cache_script: rm -rf $CARGO_HOME/registry/index
task:
container:
image: rust:1.46
env:
BUILD: check
name: Redox x86_64
env:
TARGET: x86_64-unknown-redox
# Redox requires a nightly compiler.
# If stuff breaks, change nightly to the date at
# https://gitlab.redox-os.org/redox-os/redox/-/blob/master/rust-toolchain
TOOLCHAIN: nightly-2021-06-15
setup_script:
- rustup target add $TARGET
- rustup toolchain install $TOOLCHAIN --profile minimal --target $TARGET

318
Cargo.lock.msrv Normal file
View File

@ -0,0 +1,318 @@
# This file was generated by running the following command:
# `cargo +nightly generate-lockfile -Zminimal-versions`
# We use it on CI to test non-latest-stable Rust versions.
version = 3
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