about summary refs log tree commit diff
path: root/src/nix-env/nix-env.cc
diff options
context:
space:
mode:
authorEelco Dolstra <eelco.dolstra@logicblox.com>2016-08-26T16·55+0200
committerEelco Dolstra <eelco.dolstra@logicblox.com>2016-08-29T15·29+0200
commitc0a7b84748d5e27e6804117b8a57ce71269c3c66 (patch)
tree40f22e1dd5636673f764bc1f289ab254971ca95d /src/nix-env/nix-env.cc
parent9fa21765e7f267efcc65e1aa6ab21402ea6125ad (diff)
nix path-info: Add --json flag
Also, factor out JSON generation from value-to-json.{cc,hh}, and
support producing indented JSON.
Diffstat (limited to 'src/nix-env/nix-env.cc')
-rw-r--r--src/nix-env/nix-env.cc15
1 files changed, 7 insertions, 8 deletions
diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc
index 955a2466102f..6a557e8ac9db 100644
--- a/src/nix-env/nix-env.cc
+++ b/src/nix-env/nix-env.cc
@@ -10,6 +10,7 @@
 #include "store-api.hh"
 #include "user-env.hh"
 #include "util.hh"
+#include "json.hh"
 #include "value-to-json.hh"
 #include "xml-writer.hh"
 
@@ -860,26 +861,24 @@ static VersionDiff compareVersionAgainstSet(
 
 static void queryJSON(Globals & globals, vector<DrvInfo> & elems)
 {
-    JSONObject topObj(cout);
+    JSONObject topObj(cout, true);
     for (auto & i : elems) {
-        topObj.attr(i.attrPath);
-        JSONObject pkgObj(cout);
+        JSONObject pkgObj = topObj.object(i.attrPath);
 
         pkgObj.attr("name", i.name);
         pkgObj.attr("system", i.system);
 
-        pkgObj.attr("meta");
-        JSONObject metaObj(cout);
+        JSONObject metaObj = pkgObj.object("meta");
         StringSet metaNames = i.queryMetaNames();
         for (auto & j : metaNames) {
-            metaObj.attr(j);
+            auto placeholder = metaObj.placeholder(j);
             Value * v = i.queryMeta(j);
             if (!v) {
                 printMsg(lvlError, format("derivation ‘%1%’ has invalid meta attribute ‘%2%’") % i.name % j);
-                cout << "null";
+                placeholder.write(nullptr);
             } else {
                 PathSet context;
-                printValueAsJSON(*globals.state, true, *v, cout, context);
+                printValueAsJSON(*globals.state, true, *v, placeholder, context);
             }
         }
     }