Function pickPackages

src/helpViewer/packages.ts:434–460

(packages: Package[], placeHolder: string, pickMany: boolean = false)

// Let the user pick a package, either from local installation or CRAN
async function pickPackages(packages: Package[], placeHolder: string, pickMany: boolean = false): Promise<Package[]|undefined> {
    if(!packages?.length){
        return undefined;
    }

    const qpItems: (vscode.QuickPickItem & {package: Package})[] = packages.map(pkg => ({
        label: pkg.name,
        detail: pkg.description,
        package: pkg
    }));

    const qpOptions: vscode.QuickPickOptions = {
        matchOnDescription: true,
        matchOnDetail: true,
        placeHolder: placeHolder
    };
    let ret: Package | Package[] | undefined;
    if(pickMany){
        const qp = await vscode.window.showQuickPick(qpItems, {...qpOptions, canPickMany: true});
        ret = qp?.map(v => v.package);
    } else{
        const qp = await vscode.window.showQuickPick(qpItems, qpOptions);
        ret = (qp ? [qp.package] : undefined);
    }

    return ret;
}

// Used to summarize index-entries that point to the same help file
function summarizeTopics(topics: Topic[]): Topic[] {