// helpHandler handles the GET of the main page.
func helpHandler(w http.ResponseWriter, r *http.Request) {
glog.Infof("Help Handler: %q\n", r.URL.Path)
if r.Method == "GET" {
w.Header().Set("Content-Type", "text/html")
ctx := parser.NewContext(nil)
if err := helpTemplate.Execute(w, ctx); err != nil {
glog.Errorln("Failed to expand template:", err)
}
}
}
// addFlatCalculatedTraces adds the traces returned from evaluating the given
// formula over the given tile to the FlatQueryResponse. Doesn't include an empty
// formula trace. Useful for pulling data into IPython.
func addFlatCalculatedTraces(qr *FlatQueryResponse, tile *tiling.Tile, formula string) error {
ctx := parser.NewContext(tile)
traces, err := ctx.Eval(formula)
if err != nil {
return fmt.Errorf("Failed to evaluate formula %q: %s", formula, err)
}
for _, tr := range traces {
qr.Traces = append(qr.Traces, tr)
}
return nil
}
// addCalculatedTraces adds the traces returned from evaluating the given
// formula over the given tile to the QueryResponse.
func addCalculatedTraces(qr *QueryResponse, tile *tiling.Tile, formula string) error {
ctx := parser.NewContext(tile)
traces, err := ctx.Eval(formula)
if err != nil {
return fmt.Errorf("Failed to evaluate formula %q: %s", formula, err)
}
hasFormula := false
for _, tr := range traces {
if tiling.IsFormulaID(tr.Params()["id"]) {
hasFormula = true
}
tg := traceGuiFromTrace(tr, tr.Params()["id"], tile)
qr.Traces = append(qr.Traces, tg)
}
if !hasFormula {
// If we haven't added the formula trace to the response yet, add it in now.
f := types.NewPerfTraceN(len(tile.Commits))
tg := traceGuiFromTrace(f, tiling.AsFormulaID(formula), tile)
qr.Traces = append(qr.Traces, tg)
}
return nil
}