Merge pull request #10 from jspricke/specify_version

Add option to specify the version code of an app

README.md

@@ -39,6 +39,8 @@ Install an app:
 	uninstall <appid...>  Uninstall an app
 	defaults              Reset to the default settings
 
+  A specific version of an app can be selected by following the appid with an colon (:) and the version code of the app to select.
+
 ### Config
 
 You can configure the repositories to use in the `config.json` file,

cmd/fdroidcl/main.go

@@ -140,6 +140,7 @@ func init() {
 			fmt.Fprintf(os.Stderr, "   %s%s  %s\n", c.UsageLine,
 				strings.Repeat(" ", maxUsageLen-len(c.UsageLine)), c.Short)
 		}
+		fmt.Fprintf(os.Stderr, "\nA specific version of an app can be selected by following the appid with an colon (:) and the version code of the app to select.\n")
 		fmt.Fprintf(os.Stderr, "\nUse %s <command> -h for more info\n", cmdName)
 	}
 }

cmd/fdroidcl/show.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"strconv"
 	"strings"
 
 	"github.com/mvdan/fdroidcl"
@@ -47,10 +48,34 @@ func findApps(ids []string) []*fdroidcl.App {
 	apps := appsMap(mustLoadIndexes())
 	result := make([]*fdroidcl.App, len(ids))
 	for i, id := range ids {
+		var vcode = -1
+		j := strings.Index(id, ":")
+		if j > -1 {
+			var err error
+			vcode, err = strconv.Atoi(id[j+1:])
+			if err != nil {
+				log.Fatalf("Could not parse version code from '%s'", id)
+			}
+			id = id[:j]
+		}
+
 		app, e := apps[id]
 		if !e {
 			log.Fatalf("Could not find app with ID '%s'", id)
 		}
+
+		if vcode > -1 {
+			found := false
+			for _, apk := range app.Apks {
+				if apk.VCode == vcode {
+					app.Apks = []fdroidcl.Apk{apk}
+					found = true
+				}
+			}
+			if !found {
+				log.Fatalf("Could not find version %d for app with ID '%s'", vcode, id)
+			}
+		}
 		result[i] = app
 	}
 	return result