Make the output of `ninja -t inputs` deterministic

This sorts the output of `ninja -t inputs` to make it
deterministic and remove duplicates, and adds a regression
test in output_test.py

+ Ensure all inputs are listed, not only explicit ones.
+ Document the `inputs` tool in doc/manual.asciidoc.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/graph_test.cc b/src/graph_test.cc
index 5314bc5..9dba8af 100644
--- a/src/graph_test.cc
+++ b/src/graph_test.cc
@@ -215,6 +215,39 @@ TEST_F(GraphTest, RootNodes) {
   }
 }
 
+TEST_F(GraphTest, CollectInputs) {
+  ASSERT_NO_FATAL_FAILURE(AssertParse(
+      &state_,
+      "build out$ 1: cat in1 in2 in$ with$ space | implicit || order_only\n"));
+
+  std::vector<std::string> inputs;
+  Edge* edge = GetNode("out 1")->in_edge();
+
+  // Test without shell escaping.
+  inputs.clear();
+  edge->CollectInputs(false, &inputs);
+  EXPECT_EQ(5u, inputs.size());
+  EXPECT_EQ("in1", inputs[0]);
+  EXPECT_EQ("in2", inputs[1]);
+  EXPECT_EQ("in with space", inputs[2]);
+  EXPECT_EQ("implicit", inputs[3]);
+  EXPECT_EQ("order_only", inputs[4]);
+
+  // Test with shell escaping.
+  inputs.clear();
+  edge->CollectInputs(true, &inputs);
+  EXPECT_EQ(5u, inputs.size());
+  EXPECT_EQ("in1", inputs[0]);
+  EXPECT_EQ("in2", inputs[1]);
+#ifdef _WIN32
+  EXPECT_EQ("\"in with space\"", inputs[2]);
+#else
+  EXPECT_EQ("'in with space'", inputs[2]);
+#endif
+  EXPECT_EQ("implicit", inputs[3]);
+  EXPECT_EQ("order_only", inputs[4]);
+}
+
 TEST_F(GraphTest, VarInOutPathEscaping) {
   ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
 "build a$ b: cat no'space with$ space$$ no\"space2\n"));