diff options
author | Ludovic Courtès <ludo@gnu.org> | 2020-12-02 22:49:39 +0100 |
---|---|---|
committer | Ludovic Courtès <ludo@gnu.org> | 2020-12-08 22:30:08 +0100 |
commit | 5ff521452b9ec2aae9ed8e4bb7bdc250a581f203 (patch) | |
tree | 550eb2cc894c1c76d565328b75c14d986dcf760e /nix/libstore | |
parent | 711df9ef3c04a0e0d7e844bed4c6b260ea1f65c1 (diff) |
substitute: Cache and reuse connections while substituting.
That way, when fetching a series of substitutes from the same server(s),
the connection is reused instead of being closed/opened for each
substitutes, which saves on network round trips and TLS handshakes.
* guix/http-client.scm (http-fetch): Add #:keep-alive? and honor it.
* guix/progress.scm (progress-report-port): Add #:close? parameter and
honor it.
* guix/scripts/substitute.scm (at-most): Return the tail as a second
value.
(fetch): Add #:port and #:keep-alive? and honor them.
(%max-cached-connections): New variable.
(open-connection-for-uri/cached, call-with-cached-connection): New
procedures.
(with-cached-connection): New macro.
(process-substitution): Wrap 'fetch' call in 'with-cached-connection'.
Pass #:close? to 'progress-report-port'.
Diffstat (limited to 'nix/libstore')
-rw-r--r-- | nix/libstore/build.cc | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc index 50d300253d..6cfe7aba7e 100644 --- a/nix/libstore/build.cc +++ b/nix/libstore/build.cc @@ -3114,17 +3114,24 @@ void SubstitutionGoal::handleChildOutput(int fd, const string & data) } if (fd == substituter->fromAgent.readSide) { - /* Trim whitespace to the right. */ - size_t end = data.find_last_not_of(" \t\n"); - string trimmed = (end != string::npos) ? data.substr(0, end + 1) : data; - - if (expectedHashStr == "") { - expectedHashStr = trimmed; - } else if (status == "") { - status = trimmed; - worker.wakeUp(shared_from_this()); - } else { - printMsg(lvlError, format("unexpected substituter message '%1%'") % data); + /* DATA may consist of several lines. Process them one by one. */ + string input = data; + while (!input.empty()) { + /* Process up to the first newline. */ + size_t end = input.find_first_of("\n"); + string trimmed = (end != string::npos) ? input.substr(0, end) : input; + + /* Update the goal's state accordingly. */ + if (expectedHashStr == "") { + expectedHashStr = trimmed; + } else if (status == "") { + status = trimmed; + worker.wakeUp(shared_from_this()); + } else { + printMsg(lvlError, format("unexpected substituter message '%1%'") % input); + } + + input = (end != string::npos) ? input.substr(end + 1) : ""; } } } |