From c2b0d8749f7e77afc1c4b3e8dd36b7ee9720af4a Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 26 Jan 2017 20:36:20 +0100
Subject: exportReferencesGraph: Export more complete info in JSON format
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This writes info about every path in the closure in the same format as
‘nix path-info --json’. Thus it also includes NAR hashes and sizes.

Example:

  [
    {
      "path": "/nix/store/10h6li26i7g6z3mdpvra09yyf10mmzdr-hello-2.10",
      "narHash": "sha256:0ckdc4z20kkmpqdilx0wl6cricxv90lh85xpv2qljppcmz6vzcxl",
      "narSize": 197648,
      "references": [
        "/nix/store/10h6li26i7g6z3mdpvra09yyf10mmzdr-hello-2.10",
        "/nix/store/27binbdy296qvjycdgr1535v8872vz3z-glibc-2.24"
      ],
      "closureSize": 20939776
    },
    {
      "path": "/nix/store/27binbdy296qvjycdgr1535v8872vz3z-glibc-2.24",
      "narHash": "sha256:1nfn3m3p98y1c0kd0brp80dn9n5mycwgrk183j17rajya0h7gax3",
      "narSize": 20742128,
      "references": [
        "/nix/store/27binbdy296qvjycdgr1535v8872vz3z-glibc-2.24"
      ],
      "closureSize": 20742128
    }
  ]

Fixes #1134.
---
 src/libstore/build.cc | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'src/libstore/build.cc')

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index d76c8d172..7fb5271f4 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -10,6 +10,7 @@
 #include "builtins.hh"
 #include "finally.hh"
 #include "compression.hh"
+#include "json.hh"
 
 #include <algorithm>
 #include <iostream>
@@ -2273,9 +2274,18 @@ void DerivationGoal::doExportReferencesGraph()
             }
         }
 
-        /* Write closure info to `fileName'. */
+        /* Write closure info to <fileName>. */
         writeFile(tmpDir + "/" + fileName,
             worker.store.makeValidityRegistration(paths, false, false));
+
+        /* Write a more comprehensive JSON serialisation to
+           <fileName>.json. */
+        std::ostringstream str;
+        {
+            JSONPlaceholder jsonRoot(str, true);
+            worker.store.pathInfoToJSON(jsonRoot, paths, false, true);
+        }
+        writeFile(tmpDir + "/" + fileName + ".json", str.str());
     }
 }
 
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