projvar 0.19.9

A tiny CLI tool that tries to gather project specific meta-data in different ways, to store them into key=value pairs in a file for later use by other tools. See --list for the keys set by this tool.
Documentation 
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// SPDX-FileCopyrightText: 2021 Robin Vobruba <hoijui.quaero@gmail.com>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

use cli_utils::BoxResult;

use crate::environment::Environment;
use crate::storage;
use std::{env, fmt};

pub struct VarSink;

/// Stores evaluated values (output) into environment variables.
impl super::VarSink for VarSink {
    fn is_usable(&self, _environment: &Environment) -> bool {
        true
    }

    fn store(&self, environment: &Environment, values: &[storage::Value]) -> BoxResult<()> {
        for (_key, var, (_confidence, value)) in values {
            let key = var.key(environment);
            if environment.settings.overwrite.main() || env::var(&*key).is_err() {
                env::set_var(&*key, value);
            }
        }
        Ok(())
    }
}

impl fmt::Display for VarSink {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", std::any::type_name::<Self>())
    }
}