fn apply_changes_from_apply_patch()

in codex-rs/core/src/codex.rs [1425:1486]

• 59 lines of code
• 12 McCabe index (conditional complexity)

fn apply_changes_from_apply_patch(
    changes: &HashMap<PathBuf, ApplyPatchFileChange>,
) -> anyhow::Result<AffectedPaths> {
    let mut added: Vec<PathBuf> = Vec::new();
    let mut modified: Vec<PathBuf> = Vec::new();
    let mut deleted: Vec<PathBuf> = Vec::new();

    for (path, change) in changes {
        match change {
            ApplyPatchFileChange::Add { content } => {
                if let Some(parent) = path.parent() {
                    if !parent.as_os_str().is_empty() {
                        std::fs::create_dir_all(parent).with_context(|| {
                            format!("Failed to create parent directories for {}", path.display())
                        })?;
                    }
                }
                std::fs::write(path, content)
                    .with_context(|| format!("Failed to write file {}", path.display()))?;
                added.push(path.clone());
            }
            ApplyPatchFileChange::Delete => {
                std::fs::remove_file(path)
                    .with_context(|| format!("Failed to delete file {}", path.display()))?;
                deleted.push(path.clone());
            }
            ApplyPatchFileChange::Update {
                unified_diff: _unified_diff,
                move_path,
                new_content,
            } => {
                if let Some(move_path) = move_path {
                    if let Some(parent) = move_path.parent() {
                        if !parent.as_os_str().is_empty() {
                            std::fs::create_dir_all(parent).with_context(|| {
                                format!(
                                    "Failed to create parent directories for {}",
                                    move_path.display()
                                )
                            })?;
                        }
                    }

                    std::fs::rename(path, move_path)
                        .with_context(|| format!("Failed to rename file {}", path.display()))?;
                    std::fs::write(move_path, new_content)?;
                    modified.push(move_path.clone());
                    deleted.push(path.clone());
                } else {
                    std::fs::write(path, new_content)?;
                    modified.push(path.clone());
                }
            }
        }
    }

    Ok(AffectedPaths {
        added,
        modified,
        deleted,
    })
}