#!/bin/sh
#
# Create a new sh-ves environment. With --override, the variables listed
# in SHVES_OVERRIDE_VARS (PATH, LDPATH, etc. by default) are initialized
# to empty strings in the new environment, so activating it truncates them.
#
_shves_create_env() {
    file="$SHVES_ENV_DIR/$1"
    printf "name: %s\n" "$1" > "$file"

    if [ "$2" -eq 1 ]; then
        for var in $SHVES_OVERRIDE_VARS; do
            printf "export_var:%s=\n" "$var" >> "$file"
        done
    fi
}

ves_create() {
    override=0
    case $1 in
        --override)
            override=1
            shift
            ;;
    esac

    if [ "$#" -lt 1 ]; then
        printf "ERROR: No environment name specified.\n" >&2
        return 1
    fi

    env_name="$1"

    if ! _shves_check_env_name "$env_name"; then
        return 1
    fi

    if _shves_check_env_exists "$env_name" 1; then
        printf "ERROR: Environment [%s] already exists.\n" "$env_name" >&2
        return 1
    fi

    _shves_create_env "$env_name" "$override"

    printf "Environment [%s] created successfully\n" "$env_name"
    printf "To activate, execute\n\$ ves activate %s\n" "$env_name"
}