Add --properties for things like gitHash that describe the current nanobench run.

bench/ResultsWriter.h

Index: bench/ResultsWriter.h
diff --git a/bench/ResultsWriter.h b/bench/ResultsWriter.h
index dc45f192f5eecfba97ee21d7ca50d044f249313a..56283732ec020f23f39a73d46a2f81d388d96d95 100644
--- a/bench/ResultsWriter.h
+++ b/bench/ResultsWriter.h
@@ -20,148 +20,31 @@
 /**
  * Base class for writing out the bench results.
  *
- * TODO(jcgregorio) Add info if tests fail to converge?
+ * Default implementation does nothing.
  */
 class ResultsWriter : SkNoncopyable {
 public:
-    virtual ~ResultsWriter() {};
+    virtual ~ResultsWriter() {}
 
-    // Records one key value pair that makes up a unique identifier for this run.
-    // All keys must be set before calling bench().
-    virtual void key(const char name[], const char value[]) = 0;
+    // Record one key value pair that makes up a unique key for this type of run, e.g.
+    // builder name, machine type, Debug/Release, etc.
+    virtual void key(const char name[], const char value[]) {}
 
-    // Records one option set for this run. All options must be set before
-    // calling bench().
-    virtual void option(const char name[], const char value[]) = 0;
+    // Record one key value pair that describes the run instance, e.g. git hash, build number.
+    virtual void property(const char name[], const char value[]) {}
 
-    // Denotes the start of a specific benchmark. Once bench is called,
+    // Denote the start of a specific benchmark. Once bench is called,
     // then config and timer can be called multiple times to record runs.
-    virtual void bench(const char name[], int32_t x, int32_t y) = 0;
+    virtual void bench(const char name[], int32_t x, int32_t y) {}
 
-    // Records the specific configuration a bench is run under, such as "8888".
-    virtual void config(const char name[]) = 0;
+    // Record the specific configuration a bench is run under, such as "8888".
+    virtual void config(const char name[]) {}
 
-    // Records the options for a configuration, such as "GL_RENDERER".
-    virtual void configOption(const char name[], const char* value) = 0;
+    // Record the options for a configuration, such as "GL_RENDERER".
+    virtual void configOption(const char name[], const char* value) {}
 
-    // Records a single test metric.
-    virtual void timer(const char name[], double ms) = 0;
-
-    // Call when all results are finished.
-    virtual void end() = 0;
-};
-
-/**
- * This ResultsWriter handles writing out the human readable format of the
- * bench results.
- */
-class LoggerResultsWriter : public ResultsWriter {
-public:
-    explicit LoggerResultsWriter(BenchLogger& logger, const char* timeFormat)
-        : fLogger(logger)
-        , fTimeFormat(timeFormat) {
-        fLogger.logProgress("skia bench:");
-    }
-    virtual void key(const char name[], const char value[]) {
-        // Don't log keys to keep microbench output unchanged.
-    }
-    virtual void option(const char name[], const char value[]) {
-        fLogger.logProgress(SkStringPrintf(" %s=%s", name, value));
-    }
-    virtual void bench(const char name[], int32_t x, int32_t y) {
-        fLogger.logProgress(SkStringPrintf(
-            "\nrunning bench [%3d %3d] %40s", x, y, name));
-    }
-    virtual void config(const char name[]) {
-        fLogger.logProgress(SkStringPrintf("   %s:", name));
-    }
-    virtual void configOption(const char name[], const char* value) {
-        // Don't log configOptions to keep microbench output unchanged.
-    }
-    virtual void timer(const char name[], double ms) {
-        fLogger.logProgress(SkStringPrintf("  %s = ", name));
-        fLogger.logProgress(SkStringPrintf(fTimeFormat, ms));
-    }
-    virtual void end() {
-        fLogger.logProgress("\n");
-    }
-private:
-    BenchLogger& fLogger;
-    const char* fTimeFormat;
-};
-
-/**
- * This ResultsWriter handles writing out the results in JSON.
- *
- * The output looks like (except compressed to a single line):
- *
- *  {
- *   "options" : {
- *      "alpha" : "0xFF",
- *      "scale" : "0",
- *      ...
- *      "system" : "UNIX"
- *   },
- *   "results" : [
- *      {
- *      "name" : "Xfermode_Luminosity_640_480",
- *      "results" : [
- *         {
- *            "name": "565",
- *            "cmsecs" : 143.188128906250,
- *            "msecs" : 143.835957031250
- *         },
- *         ...
- */
-
-Json::Value* SkFindNamedNode(Json::Value* root, const char name[]);
-Json::Value SkMakeBuilderJSON(const SkString &buildername);
-
-class JSONResultsWriter : public ResultsWriter {
-public:
-    explicit JSONResultsWriter(const char filename[])
-        : fFilename(filename)
-        , fRoot()
-        , fResults(fRoot["results"])
-        , fBench(NULL)
-        , fConfig(NULL) {
-    }
-    virtual void key(const char name[], const char value[]) {
-    }
-    virtual void option(const char name[], const char value[]) {
-        fRoot["options"][name] = value;
-    }
-    virtual void bench(const char name[], int32_t x, int32_t y) {
-        SkString sk_name(name);
-        sk_name.append("_");
-        sk_name.appendS32(x);
-        sk_name.append("_");
-        sk_name.appendS32(y);
-        Json::Value* bench_node = SkFindNamedNode(&fResults, sk_name.c_str());
-        fBench = &(*bench_node)["results"];
-    }
-    virtual void config(const char name[]) {
-        SkASSERT(NULL != fBench);
-        fConfig = SkFindNamedNode(fBench, name);
-    }
-    virtual void configOption(const char name[], const char* value) {
-    }
-    virtual void timer(const char name[], double ms) {
-        SkASSERT(NULL != fConfig);
-        (*fConfig)[name] = ms;
-    }
-    virtual void end() {
-        SkFILEWStream stream(fFilename.c_str());
-        stream.writeText(Json::FastWriter().write(fRoot).c_str());
-        stream.flush();
-    }
-private:
-
-    SkString fFilename;
-    Json::Value fRoot;
-    Json::Value& fResults;
-    Json::Value* fBench;
-    Json::Value* fConfig;
+    // Record a single test metric.
+    virtual void timer(const char name[], double ms) {}
 };
 
 /**
@@ -175,11 +58,8 @@ private:
       "os": "Android",
       "model": "GalaxyNexus",
     }
-    "options": {
-       "GL_Version": "3.1",
-       ...
-    },
     "gitHash": "d1830323662ae8ae06908b97f15180fd25808894",
+    "build_number": "1234",
     "results" : {
         "Xfermode_Luminosity_640_480" : {
            "8888" : {
@@ -191,19 +71,26 @@ private:
 */
 class NanoJSONResultsWriter : public ResultsWriter {
 public:
-    explicit NanoJSONResultsWriter(const char filename[], const char gitHash[])
+    explicit NanoJSONResultsWriter(const char filename[])
         : fFilename(filename)
         , fRoot()
         , fResults(fRoot["results"])
         , fBench(NULL)
-        , fConfig(NULL) {
-        fRoot["gitHash"] = gitHash;
+        , fConfig(NULL) {}
+
+    ~NanoJSONResultsWriter() {
+        SkFILEWStream stream(fFilename.c_str());
+        stream.writeText(Json::StyledWriter().write(fRoot).c_str());
+        stream.flush();
     }
+
+    // Added under "key".
     virtual void key(const char name[], const char value[]) {
         fRoot["key"][name] = value;
     }
-    virtual void option(const char name[], const char value[]) {
-        fRoot["options"][name] = value;
+    // Inserted directly into the root.
+    virtual void property(const char name[], const char value[]) {
+        fRoot[name] = value;
     }
     virtual void bench(const char name[], int32_t x, int32_t y) {
         SkString id = SkStringPrintf( "%s_%d_%d", name, x, y);
@@ -225,13 +112,8 @@ public:
         SkASSERT(NULL != fConfig);
         (*fConfig)[name] = ms;
     }
-    virtual void end() {
-        SkFILEWStream stream(fFilename.c_str());
-        stream.writeText(Json::FastWriter().write(fRoot).c_str());
-        stream.flush();
-    }
-private:
 
+private:
     SkString fFilename;
     Json::Value fRoot;
     Json::Value& fResults;
@@ -240,64 +122,4 @@ private:
 };
 
 
-/**
- * This ResultsWriter writes out to multiple ResultsWriters.
- */
-class MultiResultsWriter : public ResultsWriter {
-public:
-    MultiResultsWriter() : writers() {
-    };
-    void add(ResultsWriter* writer) {
-      writers.push_back(writer);
-    }
-    virtual void key(const char name[], const char value[]) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->key(name, value);
-        }
-    }
-    virtual void option(const char name[], const char value[]) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->option(name, value);
-        }
-    }
-    virtual void bench(const char name[], int32_t x, int32_t y) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->bench(name, x, y);
-        }
-    }
-    virtual void config(const char name[]) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->config(name);
-        }
-    }
-    virtual void configOption(const char name[], const char* value) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->configOption(name, value);
-        }
-    }
-    virtual void timer(const char name[], double ms) {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->timer(name, ms);
-        }
-    }
-    virtual void end() {
-        for (int i = 0; i < writers.count(); ++i) {
-            writers[i]->end();
-        }
-    }
-private:
-    SkTArray<ResultsWriter *> writers;
-};
-
-/**
- * Calls the end() method of T on destruction.
- */
-template <typename T> class CallEnd : SkNoncopyable {
-public:
-    CallEnd(T& obj) : fObj(obj) {}
-    ~CallEnd() { fObj.end(); }
-private:
-    T&  fObj;
-};
-
 #endif