haddock 0.2.1

Docker Compose for Podman
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use std::{
    fs,
    path::{Path, PathBuf},
};

use anyhow::{anyhow, Context, Error, Result};
use clap::ValueEnum;
use indexmap::IndexSet;
use path_absolutize::Absolutize;

use crate::{compose, config::Config};

/// Converts the Compose file to platform's canonical format
#[derive(clap::Args, Debug)]
#[command(alias = "config", next_display_order = None)]
pub(crate) struct Args {
    /// Format the output
    #[arg(long, value_enum, default_value_t = Format::Yaml)]
    format: Format,

    /// Only validate the configuration, don't print anything
    #[arg(short, long)]
    quiet: bool,

    /// Don't interpolate environment variables
    #[arg(long)]
    no_interpolate: bool,

    /// Print the service names, one per line
    #[arg(long)]
    services: bool,

    /// Print the volume names, one per line
    #[arg(long)]
    volumes: bool,

    /// Print the profile names, one per line
    #[arg(long)]
    profiles: bool,

    /// Print the image names, one per line
    #[arg(long)]
    images: bool,

    /// Save to file (default to stdout)
    #[arg(short, long)]
    output: Option<PathBuf>,
}

#[derive(ValueEnum, Clone, Debug)]
enum Format {
    Yaml,
    Json,
}

pub(crate) fn run(args: Args, config: &Config) -> Result<()> {
    let file = compose::parse(config, args.no_interpolate)?;

    if !args.quiet {
        if args.services {
            for service in file.services.into_keys() {
                println!("{service}");
            }
        } else if args.volumes {
            for volume in file.volumes.into_keys() {
                println!("{volume}");
            }
        } else if args.profiles {
            for profile in file
                .services
                .into_values()
                .flat_map(|service| service.profiles)
                .collect::<IndexSet<_>>()
            {
                println!("{profile}");
            }
        } else if args.images {
            for image in file
                .services
                .into_values()
                .filter_map(|service| service.image)
            {
                println!("{image}");
            }
        } else {
            let mut contents;

            match args.format {
                Format::Yaml => {
                    contents = serde_yaml::to_string(&file)?;
                }
                Format::Json => {
                    contents = serde_json::to_string_pretty(&file)?;
                    contents.push('\n');
                }
            }

            if let Some(path) = args.output {
                fs::write(&path, contents).with_context(|| match path.absolutize() {
                    Ok(path) => anyhow!(
                        "{} not found",
                        path.parent().unwrap_or_else(|| Path::new("/")).display()
                    ),
                    Err(err) => Error::from(err),
                })?;
            } else {
                print!("{contents}");
            }
        }
    }

    Ok(())
}