ic-query 0.29.4

Internet Computer query library for NNS, SNS, ICRC, system canisters, and public network metadata
Documentation 
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//! Module: cache_file::write::path
//!
//! Responsibility: create parent directories for caller-selected output paths.
//! Does not own: managed cache paths, refresh locking, or JSON serialization.
//! Boundary: output paths intentionally remain outside cache-root confinement.

use crate::cache_file::CacheFileError;
use std::{fs, io, path::Path};

fn create_directory(path: &Path) -> Result<(), CacheFileError> {
    fs::create_dir_all(path).map_err(|source| CacheFileError::CreateDirectory {
        path: path.to_path_buf(),
        source,
    })
}

pub(super) fn create_output_parent_directory(target_path: &Path) -> Result<(), CacheFileError> {
    create_directory(target_directory(target_path)?)
}

fn target_directory(target_path: &Path) -> Result<&Path, CacheFileError> {
    let parent = target_path
        .parent()
        .ok_or_else(|| invalid_target_path_error(target_path))?;
    if parent.as_os_str().is_empty() {
        Ok(Path::new("."))
    } else {
        Ok(parent)
    }
}

fn invalid_target_path_error(target_path: &Path) -> CacheFileError {
    CacheFileError::WriteTemp {
        path: target_path.to_path_buf(),
        source: io::Error::new(
            io::ErrorKind::InvalidInput,
            "cache target path must have a parent directory",
        ),
    }
}