Bash wrapper for Runner, a cool tool to run Rust snippets, adding stdin, caching and standard flags https://github.com/stevedonovan/runner

rust_snippet_runner.sh

function rsr() {(
    ##
    ## Use 'runner' on a string instead of a file.
    ##
    ## If code is on stdin, all arguments are passed on. Otherwise,
    ## arg1: the string to run
    ## arg2+: passed on to the executable
    ##
    ## Examples:
    ## rsr 'println!("{}", "hi");' my_arg
    ## rsr my_arg <<< 'println!("{}", "hi");'
    ## echo 'println!("{}", "hi");' | rsr my_arg
    ##
    set -e  # fail if a command fails
    set -E  # technical change so traps work with -E
    set -o pipefail  # also include intermediate commands in -e

    if [[ -p /dev/stdin ]]
    then
        # stdin is coming from a pipe
        input=$(cat -)
        args="$@"
    elif [[ -t 0 ]]
    then
        # code is coming from argument
        input="$1"
        args="${@:2}"
    else
        # stdin is coming from redirect
        input=$(cat -)
        args="$@"
    fi

    fdir="$HOME/.cache/runr"
    fbasename="r$(sha1sum --text <<< "$input $(runner --crates)" | cut -c1-28)"
    fname="${fbasename}.rs"
    srcpth="$fdir/$fname"
    binpth="$fdir/$fbasename"
    cargopth="/home/$USER/.cargo/bin/$fbasename"
    mkdir -m700 -p "$fdir"

    if [[ ! -e "$binpth" ]]
    then
        printf "$input" > "$srcpth"
        #prefix_comment="$(printf '// cached on %s as %s\n\n;' "$(date)" "$fname")"
        runner --no-simplify --static --optimize "$srcpth" -- "$args"
    else
        "$binpth" "$args"
    fi
)}