gen.go: update due to changes to core

Updates documentation and other changes not related to
a Unicode upgrade to minimize the diff.

This CL also updates gen.go to no longer copy packages
into the vendor directory. Henceforth, go mod vendor
should be used to copy packages.

Updates golang/go#27945

Change-Id: I59da1c56e81bec67979ce13d89af3a753d4809aa
Reviewed-on: https://go-review.googlesource.com/c/text/+/169637
Run-TryBot: Marcel van Lohuizen <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Russ Cox <[email protected]>

Author: mpvl

encoding/internal/identifier/gen.go

@@ -109,7 +109,12 @@ func main() {
 								use = use || a.Value != "person"
 							}
 							if a.Name.Local == "data" && use {
-								attr = a.Value + " "
+								// Patch up URLs to use https. From some links, the
+								// https version is different from the http one.
+								s := a.Value
+								s = strings.Replace(s, "http://", "https://", -1)
+								s = strings.Replace(s, "/unicode/", "/", -1)
+								attr = s + " "
 							}
 						}
 					}

encoding/internal/identifier/mib.go

@@ -12,7 +12,6 @@ import (
 	"bytes"
 	"flag"
 	"fmt"
-	"go/build"
 	"go/format"
 	"io/ioutil"
 	"os"
@@ -139,10 +138,6 @@ pkg unicode, var <new script or property> *RangeTable
 	// Copy exported packages to the destination golang.org repo.
 	copyExported("golang.org/x/net/idna")
 
-	if updateCore {
-		copyInternal()
-	}
-
 	if hasErrors {
 		fmt.Println("FAIL")
 		os.Exit(1)
@@ -242,32 +237,6 @@ func copyExported(p string) {
 		p)
 }
 
-// copyInternal copies packages used by Go core into the internal directory.
-func copyInternal() {
-	root := filepath.Join(build.Default.GOROOT, filepath.FromSlash("src/internal/x"))
-
-	err := filepath.Walk(root, func(dir string, info os.FileInfo, err error) error {
-		if err != nil || !info.IsDir() || root == dir {
-			return err
-		}
-		src := dir[len(root)+1:]
-		const slash = string(filepath.Separator)
-		if c := strings.Split(src, slash); c[0] == "text" {
-			// Copy a text repo package from its normal location.
-			src = strings.Join(c[1:], slash)
-		} else {
-			// Copy the vendored package if it exists in the export directory.
-			src = filepath.Join("internal", "export", filepath.Base(src))
-		}
-		copyPackage(src, dir, "golang.org", "internal")
-		return nil
-	})
-	if err != nil {
-		fmt.Printf("Seeding directory %s has failed %v:", root, err)
-		os.Exit(1)
-	}
-}
-
 // goGenRE is used to remove go:generate lines.
 var goGenRE = regexp.MustCompile("//go:generate[^\n]*\n")
 

gen.go

@@ -85,8 +85,10 @@ func CLDRVersion() string {
 
 var tags = []struct{ version, buildTags string }{
 	{"9.0.0", "!go1.10"},
-	{"10.0.0", "go1.10, !go1.13"},
-	{"11.0.0", "go1.13"},
+	{"10.0.0", "go1.10"},
+	// TODO
+	// {"10.0.0", "go1.10,!go1.13"},
+	// {"11.0.0", "go1.13"},
 }
 
 // buildTags reports the build tags used for the current Unicode version.