cmd,internal/symbol: add stdlib API comparison script

A script is added at cmd/internal/testing/stdlibsymbol/main.go, which
compares the stdlib API data in
https://go.googlesource.com/go/+/refs/heads/master/api with that of the
symbol_history table.

This script is used to check that data on pkgsite is accurate during
development.

Change-Id: Ib453dc8d63ee45cc3c8eb40365f9baf5636adec3
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/293429
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/cmd/internal/testing/stdlibsymbol/main.go b/cmd/internal/testing/stdlibsymbol/main.go
new file mode 100644
index 00000000..1555158d
--- /dev/null
+++ b/cmd/internal/testing/stdlibsymbol/main.go
@@ -0,0 +1,41 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// stdlibsymbol compares data from the symbol_history table with
+// the stdlib API data at
+// https://go.googlesource.com/go/+/refs/heads/master/api.
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"golang.org/x/pkgsite/cmd/internal/cmdconfig"
+	"golang.org/x/pkgsite/internal/config"
+	"golang.org/x/pkgsite/internal/log"
+)
+
+func main() {
+	ctx := context.Background()
+	cfg, err := config.Init(ctx)
+	log.SetLevel("error")
+	if err != nil {
+		log.Fatal(ctx, err)
+	}
+	db, err := cmdconfig.OpenDB(ctx, cfg, false)
+	if err != nil {
+		log.Fatal(ctx, err)
+	}
+
+	pkgToErrors, err := db.CompareStdLib(ctx)
+	if err != nil {
+		log.Fatal(ctx, err)
+	}
+	for path, errs := range pkgToErrors {
+		fmt.Printf("----- %s -----\n", path)
+		for _, e := range errs {
+			fmt.Print(e)
+		}
+	}
+}