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authorEelco Dolstra <edolstra@gmail.com>2017-04-13T18·59+0200
committerEelco Dolstra <edolstra@gmail.com>2017-04-13T18·59+0200
commit872ba75d8b6212c3a5e399ec62cbda86e58d3680 (patch)
treec685855d521992af211d5d1e6fcbe5735e8fe184 /src
parentba9ad29fdbfda3836bb06b35817f08fd10beaa22 (diff)
Add "nix show-config" command
This dumps the entire Nix configuration, including all options that
have default values.
Diffstat (limited to 'src')
-rw-r--r--src/nix/show-config.cc43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/nix/show-config.cc b/src/nix/show-config.cc
new file mode 100644
index 000000000000..ba39e2bb29b3
--- /dev/null
+++ b/src/nix/show-config.cc
@@ -0,0 +1,43 @@
+#include "command.hh"
+#include "common-args.hh"
+#include "installables.hh"
+#include "shared.hh"
+#include "store-api.hh"
+#include "json.hh"
+
+using namespace nix;
+
+struct CmdShowConfig : Command
+{
+    bool json = false;
+
+    CmdShowConfig()
+    {
+        mkFlag(0, "json", "produce JSON output", &json);
+    }
+
+    std::string name() override
+    {
+        return "show-config";
+    }
+
+    std::string description() override
+    {
+        return "show the Nix configuration";
+    }
+
+    void run() override
+    {
+        if (json) {
+            // FIXME: use appropriate JSON types (bool, ints, etc).
+            JSONObject jsonObj(std::cout, true);
+            for (auto & s : settings.getSettings())
+                jsonObj.attr(s.first, s.second);
+        } else {
+            for (auto & s : settings.getSettings())
+                std::cout << s.first + " = " + s.second + "\n";
+        }
+    }
+};
+
+static RegisterCommand r1(make_ref<CmdShowConfig>());