🦀 Small exercises to get you used to reading and writing Rust code!
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#!/usr/bin/env bash
echo "Let's get you set up with Rustlings!"
echo "Checking requirements..."
if [ -x "$(command -v git)" ]
then
echo "SUCCESS: Git is installed"
else
echo "ERROR: Git does not seem to be installed."
echo "Please download Git using your package manager or over https://git-scm.com/!"
exit 1
fi
if [ -x "$(command -v rustc)" ]
then
echo "SUCCESS: Rust is installed"
else
echo "ERROR: Rust does not seem to be installed."
echo "Please download Rust using https://rustup.rs!"
exit 1
fi
if [ -x "$(command -v cargo)" ]
then
echo "SUCCESS: Cargo is installed"
else
echo "ERROR: Cargo does not seem to be installed."
echo "Please download Rust and Cargo using https://rustup.rs!"
exit 1
fi
# Look up python installations, starting with 3 with a fallback of 2
if [ -x "$(command -v python3)" ]
then
PY="$(command -v python3)"
elif [ -x "$(command -v python)" ]
then
PY="$(command -v python)"
elif [ -x "$(command -v python2)" ]
then
PY="$(command -v python2)"
else
echo "ERROR: No working python installation was found"
echo "Please install python and add it to the PATH variable"
exit 1
fi
# Function that compares two versions strings v1 and v2 given in arguments (e.g 1.31 and 1.33.0).
# Returns 1 if v1 > v2, 0 if v1 == v2, 2 if v1 < v2.
function vercomp() {
if [[ $1 == $2 ]]
then
return 0
fi
v1=( ${1//./ } )
v2=( ${2//./ } )
len1=${#v1[@]}
len2=${#v2[@]}
max_len=$len1
if [[ $max_len -lt $len2 ]]
then
max_len=$len2
fi
for i in `seq 0 $max_len`
do
# Fill empty fields with zeros in v1
if [ -z "${v1[$i]}" ]
then
v1[$i]=0
fi
# And in v2
if [ -z "${v2[$i]}" ]
then
v2[$i]=0
fi
if [ ${v1[$i]} -gt ${v2[$i]} ]
then
return 1
fi
if [ ${v1[$i]} -lt ${v2[$i]} ]
then
return 2
fi
done
return 0
}
RustVersion=$(rustc --version | cut -d " " -f 2)
MinRustVersion=1.31
vercomp $RustVersion $MinRustVersion
if [ $? -eq 2 ]
then
echo "ERROR: Rust version is too old: $RustVersion - needs at least $MinRustVersion"
echo "Please update Rust with 'rustup update'"
exit 1
else
echo "SUCCESS: Rust is up to date"
fi
Path=${1:-rustlings/}
echo "Cloning Rustlings at $Path..."
git clone -q https://github.com/rust-lang/rustlings $Path
cd $Path
Version=$(curl -s https://api.github.com/repos/rust-lang/rustlings/releases/latest | ${PY} -c "import json,sys;obj=json.load(sys.stdin);print(obj['tag_name']);")
CargoBin="${CARGO_HOME:-$HOME/.cargo}/bin"
if [[ -z ${Version} ]]
then
echo "The latest tag version could not be fetched remotely."
echo "Using the local git repository..."
Version=$(ls -tr .git/refs/tags/ | tail -1)
if [[ -z ${Version} ]]
then
echo "No valid tag version found"
echo "Rustlings will be installed using the master branch"
Version="master"
else
Version="tags/${Version}"
fi
else
Version="tags/${Version}"
fi
echo "Checking out version $Version..."
git checkout -q ${Version}
echo "Installing the 'rustlings' executable..."
cargo install --force --path .
if ! [ -x "$(command -v rustlings)" ]
then
echo "WARNING: Please check that you have '$CargoBin' in your PATH environment variable!"
fi
# Checking whether Clippy is installed.
# Due to a bug in Cargo, this must be done with Rustup: https://github.com/rust-lang/rustup/issues/1514
Clippy=$(rustup component list | grep "clippy" | grep "installed")
if [ -z "$Clippy" ]
then
echo "Installing the 'cargo-clippy' executable..."
rustup component add clippy
fi
echo "All done! Run 'rustlings' to get started."