go-deb/readControlFile.go

package main

import (
	"bufio"
	"os"
	"strings"

	"go.wit.com/log"
)

// readGitConfig reads and parses the control file
func (c *controlBox) readControlFile() error {
	pairs := make(map[string]string)
	var key string

	file, err := os.Open("control")
	if err != nil {
		log.Warn("readControlFile() could not find the file")
		// return errors.New("'control': file not found")
		// if this happens, make up a fake control file
		pairs["Maintainer"] = "go-deb build"
		pairs["Architecture"] = "amd64" // TODO: figure this out
		pairs["Recommends"] = ""
		pairs["Source"] = "notsure"
		if argv.Repo == "" {
			pairs["Description"] = "put something here"
		} else {
			pairs["Description"] = argv.Repo
		}
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := scanner.Text()

		// Skip empty lines and comments
		if line == "" || strings.HasPrefix(line, "#") || strings.HasPrefix(line, ";") {
			continue
		}

		// if line starts with a space, it's part of the last key
		if strings.HasPrefix(line, " ") {
			pairs[key] = pairs[key] + "\n" + strings.TrimSpace(line)
			continue
		}

		partsNew := strings.SplitN(line, ":", 2)
		if len(partsNew) < 2 {
			log.Warn("error on line:", line)
			continue
		}

		key = strings.TrimSpace(partsNew[0])
		value := strings.TrimSpace(partsNew[1])
		pairs[key] = value
	}
	for key, value := range pairs {
		switch key {
		case "Source":
			c.Source.SetText(value)
		case "Build-Depends":
			c.BuildDepends.SetText(value)
		case "Description":
			c.Description.SetText(value)
		case "Maintainer":
			c.Maintainer.SetText(value)
		case "Packager":
			c.Packager.SetText(value)
		case "GoPath":
			c.GoPath.SetText(value)
		case "URL":
			c.URL.SetText(value)
		case "Depends":
			c.Depends.SetText(value)
		case "Recommends":
			c.Recommends.SetText(value)
		case "Conflicts":
			c.Conflicts.SetText(value)
		case "Version":
			c.Version.SetText(value)
		case "Package":
			c.Package.SetText(value)
			// if c.Package.String() != value {
			// 	log.Warn("not sure what to do with Package", c.Package.String(), value)
			// }
		case "Architecture":
			// todo: add logic to find OS arch
			if c.Architecture.String() != value {
				log.Warn("attempting to set arch to", value)
				c.Architecture.SetText(value)

			}
		default:
			log.Warn("error unknown key", key, "value:", value)
		}
	}

	if err := scanner.Err(); err != nil {
		return err
	}

	return nil
}