~danyspin97/rinstall

ref: 26cfc10edba215a83c3fe0fb066f893da367b816 rinstall/src/main.rs -rw-r--r-- 6.2 KiB
26cfc10eDanilo Spinella Use "cargo metadata" to get target_directory in rust projects 1 year, 3 months ago
                                                                                
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mod config;
mod dirs;
mod install_entry;
mod install_target;
mod package;
mod project;

use std::{env, fs, path::PathBuf};

use clap::Clap;
use color_eyre::eyre::{bail, ensure, Context, ContextCompat, Result};
use walkdir::WalkDir;
use xdg::BaseDirectories;

use config::Config;
use dirs::Dirs;
use install_target::InstallTarget;
use package::Package;
use project::Project;

fn main() -> Result<()> {
    color_eyre::install()?;
    let opts = Config::parse();
    let dry_run = opts.dry_run;
    let root_install = !opts.user;
    let uid = unsafe { libc::getuid() };
    ensure!(
        dry_run || !root_install || uid == 0,
        "need either root privileges or --user flag"
    );

    let mut config = if root_install {
        Config::new_default_root()
    } else {
        Config::new_default_user()
    };

    let xdg = BaseDirectories::new().context("unable to initialize XDG Base Directories")?;

    let config_file = if let Some(config_file) = &opts.config {
        let config_file = PathBuf::from(config_file);
        ensure!(config_file.exists(), "config file does not exists");
        config_file
    } else if root_install {
        PathBuf::from("/etc/rinstall.yml")
    } else {
        xdg.place_config_file("rinstall.yml")?
    };
    if config_file.exists() {
        let config_from_file = serde_yaml::from_str(
            &fs::read_to_string(&config_file)
                .with_context(|| format!("unable to read file {:?}", config_file))?,
        )?;
        if root_install {
            config.merge_root_conf(config_from_file);
        } else {
            config.merge_user_conf(config_from_file);
        }
    }

    let package_dir = opts.package_dir.clone().map_or(
        env::current_dir().context("unable to get current directory")?,
        PathBuf::from,
    );
    let destdir = opts.destdir.clone();

    if root_install {
        config.merge_root_conf(opts);
        config.replace_root_placeholders();
    } else {
        config.merge_user_conf(opts);
        config
            .replace_user_placeholders(&xdg)
            .context("unable to sanitize user directories")?;
    }

    let dirs = Dirs::new(config).context("unable to create dirs")?;

    // Try root/install.yml and root/.package/install.yml files
    let install_spec = {
        let install_spec = package_dir.join("install.yml");
        if install_spec.exists() {
            install_spec
        } else {
            let install_spec = package_dir.join(".package").join("install.yml");
            if install_spec.exists() {
                install_spec
            } else {
                bail!("unable to find 'install.yml' file");
            }
        }
    };
    let program: Package = serde_yaml::from_str(
        &fs::read_to_string(&install_spec)
            .with_context(|| format!("unable to read file {:?}", install_spec))?,
    )?;

    let project_type = program.project_type.clone();

    program
        .targets(
            dirs,
            Project::new_from_type(project_type, package_dir.clone())?,
        )?
        .iter()
        .try_for_each(|install| -> Result<()> {
            let InstallTarget {
                source,
                destination,
            } = install;
            // handle destdir
            let destination = destdir.as_ref().map_or(destination.to_owned(), |destdir| {
                // join does not work when the argument (not the self) is an absolute path
                PathBuf::from({
                    let mut s = destdir.clone();
                    s.push_str(destination.as_os_str().to_str().unwrap());
                    s
                })
            });

            ensure!(source.exists(), "{:?} does not exists", source);

            if source.is_file() {
                let destination = if destination.as_os_str().to_str().unwrap().ends_with('/') {
                    destination.join(
                        source
                            .file_name()
                            .with_context(|| format!("unable to get filename for {:?}", source))?,
                    )
                } else {
                    destination.to_owned()
                };
                println!(
                    "Installing {:?} to {:?}",
                    source.strip_prefix(&package_dir).unwrap_or(&source),
                    destination
                );
                if !dry_run {
                    fs::create_dir_all(&destination.parent().unwrap()).with_context(|| {
                        format!("unable to create directory {:?}", destination.parent())
                    })?;
                    fs::copy(source, &destination).with_context(|| {
                        format!("unable to copy file {:?} to {:?}", source, destination)
                    })?;
                }
            } else if source.is_dir() {
                WalkDir::new(&source)
                    .into_iter()
                    .try_for_each(|entry| -> Result<()> {
                        let entry = entry?;
                        if !entry.file_type().is_file() {
                            return Ok(());
                        }

                        let full_path = entry.path();
                        let relative_path = full_path.strip_prefix(&source).with_context(|| {
                            format!("unable to strip prefix {:?} from {:?}", source, full_path)
                        })?;
                        let source = source.join(relative_path);
                        let destination = destination.join(relative_path);
                        println!("Installing {:?} to {:?}", source, destination);
                        if dry_run {
                            return Ok(());
                        }

                        fs::create_dir_all(destination.parent().unwrap()).with_context(|| {
                            format!("unable to create directory {:?}", destination.parent())
                        })?;
                        fs::copy(full_path, &destination).with_context(|| {
                            format!("unable to copy file {:?} to {:?}", full_path, destination)
                        })?;

                        Ok(())
                    })?;
            } else {
                bail!("{:?} is neither a file nor a directory", source);
            }

            Ok(())
        })?;

    Ok(())
}