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bin/get-github-release.go: enable extraction of binary not in root of tar

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Also fix project name regexp to allow -
This commit is contained in:
Nick Craig-Wood 2019-01-11 16:12:37 +00:00
parent f8ced557e3
commit 98120bb864
1 changed files with 64 additions and 4 deletions
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68
bin/get-github-release.go
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@ -8,6 +8,8 @@
package main
import (
"archive/tar"
"compress/gzip"
"encoding/json"
"flag"
"fmt"
@ -31,7 +33,7 @@ var (
extract = flag.String("extract", "", "Extract the named executable from the .tar.gz and install into bindir.")
bindir = flag.String("bindir", defaultBinDir(), "Directory to install files downloaded with -extract.")
// Globals
matchProject = regexp.MustCompile(`^(\w+)/(\w+)$`)
matchProject = regexp.MustCompile(`^([\w-]+)/([\w-]+)$`)
)
// A github release
@ -229,6 +231,66 @@ func run(args ...string) {
}
}
// Untars fileName from srcFile
func untar(srcFile, fileName, extractDir string) {
f, err := os.Open(srcFile)
if err != nil {
log.Fatalf("Couldn't open tar: %v", err)
}
defer func() {
err := f.Close()
if err != nil {
log.Fatalf("Couldn't close tar: %v", err)
}
}()
var in io.Reader = f
srcExt := filepath.Ext(srcFile)
if srcExt == ".gz" || srcExt == ".tgz" {
gzf, err := gzip.NewReader(f)
if err != nil {
log.Fatalf("Couldn't open gzip: %v", err)
}
in = gzf
}
tarReader := tar.NewReader(in)
for {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("Trouble reading tar file: %v", err)
}
name := header.Name
switch header.Typeflag {
case tar.TypeReg:
baseName := filepath.Base(name)
if baseName == fileName {
outPath := filepath.Join(extractDir, fileName)
out, err := os.OpenFile(outPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0777)
if err != nil {
log.Fatalf("Couldn't open output file: %v", err)
}
defer func() {
err := out.Close()
if err != nil {
log.Fatalf("Couldn't close output: %v", err)
}
}()
n, err := io.Copy(out, tarReader)
if err != nil {
log.Fatalf("Couldn't write output file: %v", err)
}
log.Printf("Wrote %s (%d bytes) as %q", fileName, n, outPath)
}
}
}
}
func main() {
flag.Parse()
args := flag.Args()
@ -257,8 +319,6 @@ func main() {
log.Fatalf("Need to set -bindir")
}
log.Printf("Unpacking %s from %s and installing into %s", *extract, fileName, *bindir)
run("tar", "xf", fileName, *extract)
run("chmod", "a+x", *extract)
run("mv", "-f", *extract, *bindir+"/")
untar(fileName, *extract, *bindir+"/")
}
}