cockup 0.2.3

Yet another backup tool for various configurations
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use super::{copy::copy, paths::magic, state::CopyState};
use crate::{
    config::{Rule, Symlinks},
    report,
};
use std::{
    fs,
    path::{Path, PathBuf},
};

pub(super) fn expand(source: &Path) -> Result<Vec<PathBuf>, String> {
    if fs::symlink_metadata(source).is_ok() {
        return Ok(vec![source.to_path_buf()]);
    }
    if !magic(source) {
        return Ok(vec![]);
    }
    glob::glob_with(
        &source.to_string_lossy(),
        glob::MatchOptions {
            case_sensitive: true,
            require_literal_separator: true,
            require_literal_leading_dot: false,
        },
    )
    .map_err(|e| e.to_string())
    .and_then(|paths| {
        paths
            .filter(|p| {
                p.as_ref().map_or(true, |p| {
                    let last = p
                        .as_os_str()
                        .as_encoded_bytes()
                        .rsplit(|c| *c == b'/')
                        .next()
                        .unwrap_or_default();
                    last != b"."
                        && last != b".."
                        && glob::Pattern::new(&source.to_string_lossy()).is_ok_and(|pattern| {
                            pattern.matches_path_with(
                                p,
                                glob::MatchOptions {
                                    case_sensitive: true,
                                    require_literal_separator: true,
                                    require_literal_leading_dot: true,
                                },
                            )
                        })
                })
            })
            .map(|p| p.map_err(|e| e.to_string()))
            .collect()
    })
}

pub(super) fn rule(
    rule: &Rule,
    destination: &Path,
    restore: bool,
    metadata: bool,
    symlinks: Symlinks,
    state: &mut CopyState,
) -> usize {
    let mut base = rule.src.clone();
    while magic(&base) {
        base = base.parent().unwrap().to_path_buf();
    }
    let prefix = rule.src.strip_prefix(&base).unwrap();
    let backup = destination.join(&rule.to);
    let (from, to) = if restore {
        (&backup, &base)
    } else {
        (&base, &backup)
    };
    let mut failures = 0;
    for target in &rule.targets {
        let target = prefix.join(target);
        let source = from.join(target);
        if fs::symlink_metadata(&source).is_err() && !magic(&source) {
            report::warning(&format!("Source not found, skipping: {}", source.display()));
        }
        let paths = expand(&source);
        match paths {
            Err(e) => {
                report::error(&e);
                failures += 1;
            }
            Ok(paths) => {
                if (!state.planning || state.dry_run) && magic(&source) && !paths.is_empty() {
                    report::success(&format!(
                        "Target pattern matched ({} found): {}",
                        paths.len(),
                        report::display_path(&source)
                    ));
                }
                if paths.is_empty() && magic(&source) {
                    report::error(&format!(
                        "Matches not found for pattern: {}",
                        source.display()
                    ));
                    failures += 1;
                }
                for src in paths {
                    let relative = src.strip_prefix(from).unwrap();
                    if let Err(e) = copy(
                        &src,
                        &if restore {
                            state.mapped(&to.join(relative))
                        } else {
                            to.join(relative)
                        },
                        metadata,
                        symlinks,
                        &[],
                        state,
                    ) {
                        report::error(&e);
                        failures += 1;
                    }
                }
            }
        }
    }
    failures
}