Merge pull request #97133 from Infinisil/improved-toPretty

Improve `generators.toPretty`

lib/tests/misc.nix

@@ -445,32 +445,90 @@ runTests {
       expected = builtins.toJSON val;
   };
 
-  testToPretty = {
-    expr = mapAttrs (const (generators.toPretty {})) rec {
+  testToPretty =
+    let
+      deriv = derivation { name = "test"; builder = "/bin/sh"; system = builtins.currentSystem; };
+    in {
+    expr = mapAttrs (const (generators.toPretty { multiline = false; })) rec {
       int = 42;
       float = 0.1337;
       bool = true;
+      emptystring = "";
       string = ''fno"rd'';
+      newlinestring = "\n";
       path = /. + "/foo";
       null_ = null;
       function = x: x;
       functionArgs = { arg ? 4, foo }: arg;
       list = [ 3 4 function [ false ] ];
+      emptylist = [];
       attrs = { foo = null; "foo bar" = "baz"; };
-      drv = derivation { name = "test"; system = builtins.currentSystem; };
+      emptyattrs = {};
+      drv = deriv;
     };
     expected = rec {
       int = "42";
       float = "~0.133700";
       bool = "true";
+      emptystring = ''""'';
       string = ''"fno\"rd"'';
+      newlinestring = "\"\\n\"";
       path = "/foo";
       null_ = "null";
-      function = "<λ>";
-      functionArgs = "<λ:{(arg),foo}>";
+      function = "<function>";
+      functionArgs = "<function, args: {arg?, foo}>";
       list = "[ 3 4 ${function} [ false ] ]";
-      attrs = "{ \"foo\" = null; \"foo bar\" = \"baz\"; }";
-      drv = "<δ:test>";
+      emptylist = "[ ]";
+      attrs = "{ foo = null; \"foo bar\" = \"baz\"; }";
+      emptyattrs = "{ }";
+      drv = "<derivation ${deriv.drvPath}>";
+    };
+  };
+
+  testToPrettyMultiline = {
+    expr = mapAttrs (const (generators.toPretty { })) rec {
+      list = [ 3 4 [ false ] ];
+      attrs = { foo = null; bar.foo = "baz"; };
+      newlinestring = "\n";
+      multilinestring = ''
+        hello
+        there
+        test
+      '';
+      multilinestring' = ''
+        hello
+        there
+        test'';
+    };
+    expected = rec {
+      list = ''
+        [
+          3
+          4
+          [
+            false
+          ]
+        ]'';
+      attrs = ''
+        {
+          bar = {
+            foo = "baz";
+          };
+          foo = null;
+        }'';
+      newlinestring = "''\n  \n''";
+      multilinestring = ''
+        '''
+          hello
+          there
+          test
+        ''''';
+      multilinestring' = ''
+        '''
+          hello
+          there
+          test''''';
+
     };
   };