dirmux 0.1.1

Directory and git repository command running program
Documentation 
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use crate::options::StatusOpts;
use crate::renderers::cleanup_path;
use crate::styling::Style;
use crate::CommandMessage;
use crate::CommandOutput;
use crate::DirRunner;
use anyhow::Result;
use async_trait::async_trait;
use std::path::PathBuf;
use tokio::sync::mpsc::UnboundedSender;
use tokio::task;

pub struct StatusRunner {
    pub opts: StatusOpts,
}

#[async_trait]
impl DirRunner for StatusRunner {
    async fn process(
        &self,
        dir: PathBuf,
        _sender: UnboundedSender<CommandMessage>,
    ) -> Result<CommandOutput> {
        let dir_out = dir.clone();
        let res = task::spawn_blocking(move || git_status(&dir)).await?;

        match res {
            Ok(s) => Ok(CommandOutput {
                dir: dir_out,
                output: s,
                error: String::from(""),
            }),
            Err(e) => Ok(CommandOutput {
                dir: dir_out,
                error: e.to_string(),
                output: String::from(""),
            }),
        }
    }
}

fn git_status(dir: &PathBuf) -> Result<String> {
    let repo = git2::Repository::open(dir)?;
    let head = repo.head()?;
    let shorthand = head.shorthand().or(Some(""));
    let mut status_options = git2::StatusOptions::new();
    status_options.include_untracked(true);
    let statuses = repo.statuses(Some(&mut status_options))?;
    let mut modified_count = 0; // M
    let mut added_count = 0; // A
    let mut deleted_count = 0; // D
    let mut renamed_count = 0; // R
    let mut typechange_count = 0; // T
    let mut ignored_count = 0; // !
    let mut conflicted_count = 0; // C
    let mut unknown_count = 0; // ?
    for i in statuses.iter() {
        let s = i.status();
        if s.is_index_new() {
            added_count += 1;
        }
        if s.is_wt_new() {
            unknown_count += 1;
        }
        if s.is_index_modified() || s.is_wt_modified() {
            modified_count += 1;
        }
        if s.is_index_deleted() || s.is_wt_deleted() {
            deleted_count += 1;
        }
        if s.is_index_renamed() || s.is_wt_renamed() {
            renamed_count += 1;
        }
        if s.is_index_typechange() || s.is_wt_typechange() {
            typechange_count += 1;
        }
        if s.is_ignored() {
            ignored_count += 1;
        }
        if s.is_conflicted() {
            conflicted_count += 1;
        }
    }

    let mut output: Vec<String> = vec![];
    let mut char_count = 0;
    char_count += status_fmt(&mut output, "A", added_count, "git-added");
    char_count += status_fmt(&mut output, "M", modified_count, "git-modified");
    char_count += status_fmt(&mut output, "D", deleted_count, "git-deleted");
    char_count += status_fmt(&mut output, "R", renamed_count, "git-renamed");
    char_count += status_fmt(&mut output, "T", typechange_count, "git-typechanged");
    char_count += status_fmt(&mut output, "!", ignored_count, "git-ignored");
    char_count += status_fmt(&mut output, "C", conflicted_count, "git-conflicted");
    char_count += status_fmt(&mut output, "?", unknown_count, "git-unknown");

    let statuses = output.join(" ");
    if output.len() > 1 {
        char_count += output.len() - 1;
    }

    let mut output = String::from("");
    if statuses.is_empty() && (shorthand == Some("master") || shorthand == Some("main")) {
        Ok(output)
    } else {
        output.push_str(format!("{:>20} ", cleanup_path(dir)?).as_ref());
        output.push_str(format!("{}", statuses).as_ref());
        let statuses_width = 12;
        let padding = statuses_width - std::cmp::min(statuses_width, char_count);
        output.push_str(format!("{:width$}", "", width = padding).as_ref());

        if let Some(s) = shorthand {
            output.push_str(format!(" {:12}", s).as_ref())
        }

        output.push('\n');
        Ok(output)
    }
}

fn status_fmt(output: &mut Vec<String>, suff: &str, count: u32, style: &str) -> usize {
    if count > 0 {
        let style = Style::id(style);
        output.push(format!(
            "{}{}{}{}",
            style.before(),
            count,
            suff,
            style.after()
        ));
        format!("{}{}", count, suff).len()
    } else {
        0
    }
}