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BinaryCacheStore::readFile(): Return a shared_ptr to a string

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This allows readFile() to indicate that a file doesn't exist, and
might eliminate some large string copying.
This commit is contained in:
Eelco Dolstra 2016-04-15 15:11:34 +02:00
parent 99851c6f06
commit d1b0909894
11 changed files with 52 additions and 28 deletions
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9
src/libstore/download.cc
View file

@ -29,7 +29,7 @@ std::string resolveUri(const std::string & uri)
struct CurlDownloader : public Downloader
{
CURL * curl;
string data;
ref<std::string> data;
string etag, status, expectedETag;
struct curl_slist * requestHeaders;
@ -41,7 +41,7 @@ struct CurlDownloader : public Downloader
size_t writeCallback(void * contents, size_t size, size_t nmemb)
{
size_t realSize = size * nmemb;
data.append((char *) contents, realSize);
data->append((char *) contents, realSize);
return realSize;
}
@ -110,6 +110,7 @@ struct CurlDownloader : public Downloader
}
CurlDownloader()
: data(make_ref<std::string>())
{
requestHeaders = 0;
@ -156,7 +157,7 @@ struct CurlDownloader : public Downloader
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
}
data.clear();
data->clear();
if (requestHeaders) {
curl_slist_free_all(requestHeaders);
@ -269,7 +270,7 @@ Path Downloader::downloadCached(ref<Store> store, const string & url_, bool unpa
auto res = download(url, options);
if (!res.cached)
storePath = store->addTextToStore(name, res.data, PathSet(), false);
storePath = store->addTextToStore(name, *res.data, PathSet(), false);
assert(!storePath.empty());
replaceSymlink(storePath, fileLink);