fn npm_view_query(name: &str, version: &str) -> Fallible<PackageIndex> {
    let mut command = npm_view_command_for(name, version);
    debug!("Running command: `{:?}`", command);

    let spinner = progress_spinner(&format!(
        "Querying metadata for {}",
        tool_version(name, version)
    ));
    let output = command
        .output()
        .with_context(|_| ErrorDetails::NpmViewError)?;
    spinner.finish_and_clear();

    if !output.status.success() {
        debug!(
            "Command failed, stderr is:\n{}",
            String::from_utf8_lossy(&output.stderr).to_string()
        );
        debug!("Exit code is {:?}", output.status.code());
        throw!(ErrorDetails::NpmViewMetadataFetchError);
    }

    let response_json = String::from_utf8_lossy(&output.stdout);

    // Sometimes the returned JSON is an array (semver case), otherwise it's a single object.
    // Check if the first char is '[' and parse as an array if so
    if response_json.chars().next() == Some('[') {
        let metadatas: Vec<super::serial::NpmViewData> =
            serde_json::de::from_str(&response_json)
                .with_context(|_| ErrorDetails::NpmViewMetadataParseError)?;
        debug!("[parsed package metadata (array)]\n{:?}", metadatas);

        // get latest version, making sure the array is not empty
        let latest = match metadatas.iter().next() {
            Some(m) => m.dist_tags.latest.clone(),
            None => throw!(ErrorDetails::PackageNotFound {
                package: name.to_string()
            }),
        };

        let mut entries: Vec<PackageDetails> = metadatas.into_iter().map(|e| e.into()).collect();
        // sort so that the versions are ordered highest-to-lowest
        entries.sort_by(|a, b| b.version.cmp(&a.version));

        debug!("[sorted entries]\n{:?}", entries);

        Ok(PackageIndex { latest, entries })
    } else {
        let metadata: super::serial::NpmViewData = serde_json::de::from_str(&response_json)
            .with_context(|_| ErrorDetails::NpmViewMetadataParseError)?;
        debug!("[parsed package metadata (single)]\n{:?}", metadata);

        Ok(PackageIndex {
            latest: metadata.dist_tags.latest.clone(),
            entries: vec![metadata.into()],
        })
    }
}
/// Use `npm view` to get the info for the package. This supports:
///
/// * normal package installation from the public npm repo
/// * installing packages from alternate registries, configured via .npmrc
Use `npm view` to get the info for the package. This supports:
normal package installation from the public npm repo
installing packages from alternate registries, configured via .npmrc
Use ` npm view ` to get the info for the package . This supports : normal package installation from the public npm repo installing packages from alternate registries configured via . npmrc
fn npm_view_query(name: &str, version: &str) -> Fallible<PackageIndex> {
    let mut command = npm_view_command_for(name, version);
    debug!("Running command: `{:?}`", command);
    let spinner = progress_spinner(&format!(
        "Querying metadata for {}",
        tool_version(name, version)
    ));
    let output = command
        .output()
        .with_context(|_| ErrorDetails::NpmViewError)?;
    spinner.finish_and_clear();
    if !output.status.success() {
        debug!(
            "Command failed, stderr is:\n{}",
            String::from_utf8_lossy(&output.stderr).to_string()
        );
        debug!("Exit code is {:?}", output.status.code());
        throw!(ErrorDetails::NpmViewMetadataFetchError);
    }
    let response_json = String::from_utf8_lossy(&output.stdout);
    // Sometimes the returned JSON is an array (semver case), otherwise it's a single object.
    // Check if the first char is '[' and parse as an array if so
    if response_json.chars().next() == Some('[') {
        let metadatas: Vec<super::serial::NpmViewData> =
            serde_json::de::from_str(&response_json)
                .with_context(|_| ErrorDetails::NpmViewMetadataParseError)?;
        debug!("[parsed package metadata (array)]\n{:?}", metadatas);
        // get latest version, making sure the array is not empty
        let latest = match metadatas.iter().next() {
            Some(m) => m.dist_tags.latest.clone(),
            None => throw!(ErrorDetails::PackageNotFound {
                package: name.to_string()
            }),
        };
        let mut entries: Vec<PackageDetails> = metadatas.into_iter().map(|e| e.into()).collect();
        // sort so that the versions are ordered highest-to-lowest
        entries.sort_by(|a, b| b.version.cmp(&a.version));
        debug!("[sorted entries]\n{:?}", entries);
        Ok(PackageIndex { latest, entries })
    } else {
        let metadata: super::serial::NpmViewData = serde_json::de::from_str(&response_json)
            .with_context(|_| ErrorDetails::NpmViewMetadataParseError)?;
        debug!("[parsed package metadata (single)]\n{:?}", metadata);
        Ok(PackageIndex {
            latest: metadata.dist_tags.latest.clone(),
            entries: vec![metadata.into()],
        })
    }
}
fn npm_view_query ( name : & str , version : & str ) -> Fallible < PackageIndex > { let mut command = npm_view_command_for ( name , version ) ; debug ! ( " " command ) ; let spinner = progress_spinner ( & format ! ( " " tool_version ( name version ) ) ) ; let output = command . output ( ) . with_context ( | _ | ErrorDetails :: NpmViewError ) ? ; spinner . finish_and_clear ( ) ; if ! output . status . success ( ) { debug ! ( " \n " String from_utf8_lossy ( output stderr ) to_string ( ) ) ; debug ! ( " " output status code ( ) ) ; throw ! ( ErrorDetails NpmViewMetadataFetchError ) ; } let response_json = String :: from_utf8_lossy ( & output . stdout ) ; // Sometimes the returned JSON is an array (semver case), otherwise it's a single object. // Check if the first char is '[' and parse as an array if so if response_json . chars ( ) . next ( ) == Some ( '[' ) { let metadatas : Vec < super :: serial :: NpmViewData > = serde_json :: de :: from_str ( & response_json ) . with_context ( | _ | ErrorDetails :: NpmViewMetadataParseError ) ? ; debug ! ( " \n " metadatas ) ; // get latest version, making sure the array is not empty let latest = match metadatas . iter ( ) . next ( ) { Some ( m ) => m . dist_tags . latest . clone ( ) , None => throw ! ( ErrorDetails PackageNotFound { package name to_string ( ) } ) , } ; let mut entries : Vec < PackageDetails > = metadatas . into_iter ( ) . map ( | e | e . into ( ) ) . collect ( ) ; // sort so that the versions are ordered highest-to-lowest entries . sort_by ( | a , b | b . version . cmp ( & a . version ) ) ; debug ! ( " \n " entries ) ; Ok ( PackageIndex { latest , entries } ) } else { let metadata : super :: serial :: NpmViewData = serde_json :: de :: from_str ( & response_json ) . with_context ( | _ | ErrorDetails :: NpmViewMetadataParseError ) ? ; debug ! ( " \n " metadata ) ; Ok ( PackageIndex { latest : metadata . dist_tags . latest . clone ( ) , entries : vec ! [ metadata into ( ) ] , } ) } }
Use `npm view` to get the info for the package.
Use ` npm view ` to get the info for the package .
name
&str
version
&str