github.com/lab47/exprcore@v0.0.0-20210525052339-fb7d6bd9331e/docs/update.go (about)

     1  //+build ignore
     2  
     3  // The update command creates/updates the <html><head> elements of
     4  // each subpackage beneath docs so that "go get" requests redirect
     5  // to GitHub and other HTTP requests redirect to godoc.corp.
     6  //
     7  // Usage:
     8  //
     9  //   $ cd $GOPATH/src/github.com/lab47/exprcore
    10  //   $ go run docs/update.go
    11  //
    12  package main
    13  
    14  import (
    15  	"bytes"
    16  	"fmt"
    17  	"io/ioutil"
    18  	"log"
    19  	"os"
    20  	"os/exec"
    21  	"path/filepath"
    22  	"strings"
    23  )
    24  
    25  func main() {
    26  	log.SetFlags(0)
    27  	log.SetPrefix("update: ")
    28  
    29  	cwd, err := os.Getwd()
    30  	if err != nil {
    31  		log.Fatal(err)
    32  	}
    33  	if filepath.Base(cwd) != "github.com/lab47/exprcore" {
    34  		log.Fatalf("must run from the github.com/lab47/exprcore directory")
    35  	}
    36  
    37  	cmd := exec.Command("go", "list", "./...")
    38  	cmd.Stdout = new(bytes.Buffer)
    39  	cmd.Stderr = os.Stderr
    40  	if err := cmd.Run(); err != nil {
    41  		log.Fatal(err)
    42  	}
    43  	for _, pkg := range strings.Split(strings.TrimSpace(fmt.Sprint(cmd.Stdout)), "\n") {
    44  		rel := strings.TrimPrefix(pkg, "github.com/lab47/exprcore/") // e.g. "cmd/exprcore"
    45  		subdir := filepath.Join("docs", rel)
    46  		if err := os.MkdirAll(subdir, 0777); err != nil {
    47  			log.Fatal(err)
    48  		}
    49  
    50  		// Create missing docs/$rel/index.html files.
    51  		html := filepath.Join(subdir, "index.html")
    52  		if _, err := os.Stat(html); os.IsNotExist(err) {
    53  			data := strings.Replace(defaultHTML, "$PKG", pkg, -1)
    54  			if err := ioutil.WriteFile(html, []byte(data), 0666); err != nil {
    55  				log.Fatal(err)
    56  			}
    57  			log.Printf("created %s", html)
    58  		}
    59  	}
    60  }
    61  
    62  const defaultHTML = `<html>
    63  <head>
    64    <meta name="go-import" content="github.com/lab47/exprcore git https://github.com/google/exprcore-go"></meta>
    65    <meta http-equiv="refresh" content="0;URL='http://godoc.org/$PKG'" /></meta>
    66  </head>
    67  <body>
    68    Redirecting to godoc.org page for $PKG...
    69  </body>
    70  </html>
    71  `