From 532d73d5d86c3d25d08a8d771a189708dac323e2 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 13 Mar 2017 14:07:58 +0100
Subject: BinaryCacheStore: Implement getBuildLog()

We assume that build logs are stored under log/<drv>, e.g.

  /nix/store/q7ab198v13p0f8x8wgnd75dva7d5mip6-friday-devil-0.1.1.1.drv

maps to

  https://cache.nixos.org/log/q7ab198v13p0f8x8wgnd75dva7d5mip6-friday-devil-0.1.1.1.drv
---
 src/libstore/binary-cache-store.cc | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'src/libstore/binary-cache-store.cc')

diff --git a/src/libstore/binary-cache-store.cc b/src/libstore/binary-cache-store.cc
index 3e07a2aa2b60..120345b2670d 100644
--- a/src/libstore/binary-cache-store.cc
+++ b/src/libstore/binary-cache-store.cc
@@ -382,4 +382,28 @@ ref<FSAccessor> BinaryCacheStore::getFSAccessor()
     return make_ref<RemoteFSAccessor>(ref<Store>(shared_from_this()));
 }
 
+std::shared_ptr<std::string> BinaryCacheStore::getBuildLog(const Path & path)
+{
+    Path drvPath;
+
+    if (isDerivation(path))
+        drvPath = path;
+    else {
+        try {
+            auto info = queryPathInfo(path);
+            // FIXME: add a "Log" field to .narinfo
+            if (info->deriver == "") return nullptr;
+            drvPath = info->deriver;
+        } catch (InvalidPath &) {
+            return nullptr;
+        }
+    }
+
+    auto logPath = "log/" + baseNameOf(drvPath);
+
+    debug("fetching build log from binary cache ‘%s/%s’", getUri(), logPath);
+
+    return getFile(logPath);
+}
+
 }
-- 
cgit 1.4.1