trustfall_rustdoc 0.39.0

Run Trustfall queries across multiple rustdoc JSON format versions.
Documentation 
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// AUTOGENERATED FROM template/parser.rs.template; DO NOT EDIT DIRECTLY

use std::{fs::File, io::Read, path::Path};

use crate::{LoadingError, versioned::VersionedStorage};

pub fn load_rustdoc(
    path: &Path,
    metadata: Option<cargo_metadata::Metadata>,
) -> Result<VersionedStorage, LoadingError> {
    let package = metadata.map(super::get_package_metadata).transpose()?;

    // Parsing JSON after fully reading a file into memory is much faster than
    // parsing directly from a file, even if buffered:
    // https://github.com/serde-rs/json/issues/160
    let mut file_data = String::new();
    File::open(path)
        .map_err(|e| LoadingError::RustdocIoError(path.display().to_string(), e))?
        .read_to_string(&mut file_data)
        .map_err(|e| LoadingError::RustdocIoError(path.display().to_string(), e))?;

    let format_version = super::detect_rustdoc_format_version(path, &file_data)?;

    match format_version {
        #[cfg(feature = "v56")]
        56 => {
            let rustdoc: trustfall_rustdoc_adapter_v56::Crate =
                super::parse_or_report_error(path, &file_data, format_version)?;
            match package {
                Some(package) => Ok(VersionedStorage::V56(
                    trustfall_rustdoc_adapter_v56::PackageStorage::from_rustdoc_and_package(
                        rustdoc, package,
                    ),
                )),
                None => Ok(VersionedStorage::V56(
                    trustfall_rustdoc_adapter_v56::PackageStorage::from_rustdoc(rustdoc),
                )),
            }
        }

        #[cfg(feature = "v57")]
        57 => {
            let rustdoc: trustfall_rustdoc_adapter_v57::Crate =
                super::parse_or_report_error(path, &file_data, format_version)?;
            match package {
                Some(package) => Ok(VersionedStorage::V57(
                    trustfall_rustdoc_adapter_v57::PackageStorage::from_rustdoc_and_package(
                        rustdoc, package,
                    ),
                )),
                None => Ok(VersionedStorage::V57(
                    trustfall_rustdoc_adapter_v57::PackageStorage::from_rustdoc(rustdoc),
                )),
            }
        }

        #[cfg(feature = "v60")]
        60 => {
            let rustdoc: trustfall_rustdoc_adapter_v60::Crate =
                super::parse_or_report_error(path, &file_data, format_version)?;
            match package {
                Some(package) => Ok(VersionedStorage::V60(
                    trustfall_rustdoc_adapter_v60::PackageStorage::from_rustdoc_and_package(
                        rustdoc, package,
                    ),
                )),
                None => Ok(VersionedStorage::V60(
                    trustfall_rustdoc_adapter_v60::PackageStorage::from_rustdoc(rustdoc),
                )),
            }
        }

        _ => Err(LoadingError::UnsupportedFormat(
            format_version,
            path.display().to_string(),
        )),
    }
}