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Include a conditional update script

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Michal 'vorner' Vaner 2017-10-11 20:50:58 +02:00
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9
README.md
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@ -180,6 +180,15 @@ transparently:
#[cfg_attr(feature = "cargo-clippy", allow(needless_lifetimes))]
```
## Updating rustc
Sometimes, rustc moves forward without clippy catching up. Therefore updating
rustc may leave clippy a non-functional state until we fix the resulting
breakage.
You can use the [rust-update](rust-update) script to update rustc only if
clippy would also update correctly.
## License
Licensed under [MPL](https://www.mozilla.org/MPL/2.0/).

31
rust-update Executable file
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@ -0,0 +1,31 @@
#!/bin/sh
if [ "$1" = '-h' ] ; then
echo 'Updates rustc & clippy'
echo 'It first checks if clippy would compile at currentl nightly and if so, it updates.'
echo 'Options:'
echo '-h: This help message'
echo '-f: Skips the check and just updates'
exit
fi
set -ex
renice -n 10 -p $$
export CARGO_INCREMENTAL=0
export RUSTFLAGS='-C target-cpu=native'
try_out() {
export RUSTUP_HOME=$HOME/.rustup-attempt
test -d $RUSTUP_HOME || (rustup toolchain add nightly && rustup default nightly)
rustup update
cargo +nightly install --force clippy
unset RUSTUP_HOME
export RUSTUP_HOME
}
[ "$1" = '-f' ] || try_out
rustup update
cargo +nightly install --force clippy