dotnet-directory

#!/bin/bash

# This is a script called by multiple tests to find the runtime
# directory of the current platform.

set -euo pipefail

print_err()
{
    echo "err: $@" 1>&2;
}

print_usage() {
    echo "usage: $0 [--root (default) | --sdk | --framework <runtime version> | --help ]" 1>&2
    echo "" 1>&2
    echo "Shows a .NET directory." 1>&2
}

if [ "${1:-}" == "--help" ]; then
    print_usage
    exit 0
fi

dotnet_command_path=$(command -v dotnet || true)
if [ -z "$dotnet_command_path" ]; then
    print_err "'dotnet' command not found."
    exit 1
fi
dotnet_dir=$(dirname "$(realpath "$dotnet_command_path")")

print_root() {
    if [ ! -d "$dotnet_dir" ]; then
        print_err "dotnet root directory not found."
        exit 1
    fi
    echo "${dotnet_dir}"
    exit 0
}

print_sdk() {
    local sdk_version="$(dotnet --version)"
    local sdk_dir="${dotnet_dir}/sdk/${sdk_version}"
    if [ ! -d "$sdk_dir" ]; then
        print_err "sdk directory for $sdk_version not found."
        exit 1
    fi
    echo "${sdk_dir}"
    exit 0
}

print_framework() {
    if [[ $# -lt 2 ]]; then
        print_err "Missing <version> argument."
        exit 1
    fi
    local dir_name="$1"
    local version="$2"
    declare -a versions
    IFS='.-' read -ra versions <<< "${version}"
    framework_dirs=( "${dotnet_dir}/shared/$dir_name/${versions[0]}.${versions[1]:-}"* )
    framework_dir="${framework_dirs[0]}"
    if [ ! -d "$framework_dir" ]; then
        print_err "framework directory for $version not found."
        exit 1
    fi
    echo "${framework_dir}"
    exit 0
}

if [[ $# -eq 0 ]]; then
    command="--root"
else
    command="$1"
    shift
fi
case "$command" in
    --root)
        print_root "$@"
        ;;
    --framework)
        print_framework "Microsoft.NETCore.App" "$@"
        ;;
    --aspnet)
        print_framework "Microsoft.AspNetCore.App" "$@"
        ;; 
    --sdk)
        print_sdk "$@"
        ;;
    *)
        print_err "unknown argument: $1."
        print_usage
        exit 1
esac