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package main
import (
"archive/tar"
"bufio"
"compress/gzip"
"errors"
"fmt"
"io"
"net/http"
"os"
"strconv"
flag "github.com/spf13/pflag"
)
func main() {
var (
url = flag.StringP("url", "u", "", "Url to the APKINDEX.tar.gz")
output = flag.StringP("output", "o", "index.md", "Output path")
templateType = flag.StringP("template-type", "t", "text", "Template system to be used, options: html, text")
templateFile = flag.StringP("template-file", "f", "text", "Template file to be used")
)
flag.Parse()
err := run(
*url,
*output,
*templateType,
*templateFile,
)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func run(
url string,
output string,
templateType string,
templateFile string,
) error {
tarStream, err := fechIndex(url)
if err != nil {
return fmt.Errorf("Error fecthing index file: %w", err)
}
defer tarStream.Close()
archive, err := gzip.NewReader(tarStream)
if err != nil {
return fmt.Errorf("Error creating gzip reader: %w", err)
}
tr := tar.NewReader(archive)
for {
h, err := tr.Next()
if err != nil {
return fmt.Errorf("Error reading next tar entry: %w", err)
}
if h.FileInfo().Name() == "APKINDEX" {
break
}
}
var (
s = bufio.NewScanner(tr)
entries = make([]*Entry, 0)
lines = make([]string, 0)
)
for s.Scan() {
l := s.Text()
if l == "" {
entry := Parse(lines)
entries = append(entries, entry)
lines = make([]string, 0)
} else {
lines = append(lines, l)
}
}
outputFile, err := getOutputFile(output)
if err != nil {
return fmt.Errorf("Error openning output file: %w", err)
}
tmpl, err := GetTemplate(templateType, templateFile)
if err != nil {
return fmt.Errorf("Error loading template file: %w", err)
}
err = tmpl.Execute(outputFile, entries)
if err != nil {
return fmt.Errorf("Error executing template: %w", err)
}
return nil
}
func getOutputFile(output string) (*os.File, error) {
if output != "" {
outputFile, err := os.Create(output)
if err != nil {
return nil, err
}
return outputFile, nil
} else {
return os.Stdout, nil
}
}
func fechIndex(url string) (io.ReadCloser, error) {
resp, err := http.Get(url)
if err != nil {
return nil, err
}
if resp.StatusCode != 200 {
return nil, errors.New("Http error " + strconv.Itoa(resp.StatusCode))
}
return resp.Body, nil
}
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