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authorEelco Dolstra <edolstra@gmail.com>2018-03-20T14·17+0100
committerEelco Dolstra <edolstra@gmail.com>2018-03-20T14·25+0100
commit1aca195e52d4fbf76908e6588b55ed8b5b25cfc8 (patch)
tree54c34371afebf63b886d3f5a9e747d5d237e0ab7 /src/libstore
parent78d0c72b52835161fd15058b111aa05d69ce062b (diff)
Hack to get SSH error messages from build-remote
E.g.

  cannot build on 'ssh://mac1': cannot connect to 'mac1': bash: nix-store: command not found
  cannot build on 'ssh://mac2': cannot connect to 'mac2': Host key verification failed.
  cannot build on 'ssh://mac3': cannot connect to 'mac3': Received disconnect from 213... port 6001:2: Too many authentication failures
  Authentication failed.
Diffstat (limited to 'src/libstore')
-rw-r--r--src/libstore/build.cc5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index b8613427e0fa..5c548755c65a 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -652,6 +652,11 @@ HookInstance::HookInstance()
         if (dup2(builderOut.writeSide.get(), 4) == -1)
             throw SysError("dupping builder's stdout/stderr");
 
+        /* Hack: pass the read side of that fd to allow build-remote
+           to read SSH error messages. */
+        if (dup2(builderOut.readSide.get(), 5) == -1)
+            throw SysError("dupping builder's stdout/stderr");
+
         Strings args = {
             baseNameOf(settings.buildHook),
             std::to_string(verbosity),