Add '--no-net' convenience flag

This flag

* Disables substituters.

* Sets the tarball-ttl to infinity (ensuring e.g. that the flake
  registry and any downloaded flakes are considered current).

* Disables retrying downloads and sets the connection timeout to the
  minimum. (So it doesn't completely disable downloads at the moment.)

(cherry picked from commit 8ea842260b4fd93315d35c5ba94b1ff99ab391d8)

1 files changed, 1 insertions, 17 deletions

diff --git a/src/libstore/download.cc b/src/libstore/download.cc
index 43d231e303..342a8aa214 100644
--- a/src/libstore/download.cc
+++ b/src/libstore/download.cc
@@ -29,23 +29,7 @@ using namespace std::string_literals;
 
 namespace nix {
 
-struct DownloadSettings : Config
-{
-    Setting<bool> enableHttp2{this, true, "http2",
-        "Whether to enable HTTP/2 support."};
-
-    Setting<std::string> userAgentSuffix{this, "", "user-agent-suffix",
-        "String appended to the user agent in HTTP requests."};
-
-    Setting<size_t> httpConnections{this, 25, "http-connections",
-        "Number of parallel HTTP connections.",
-        {"binary-caches-parallel-connections"}};
-
-    Setting<unsigned long> connectTimeout{this, 0, "connect-timeout",
-        "Timeout for connecting to servers during downloads. 0 means use curl's builtin default."};
-};
-
-static DownloadSettings downloadSettings;
+DownloadSettings downloadSettings;
 
 static GlobalConfig::Register r1(&downloadSettings);