Merge pull request #329 from AlexWayfer/improve_versions_output

Highlight diff between old and new versions better

print.go

@@ -370,60 +370,52 @@ func formatTime(i int) string {
 	return fmt.Sprintf("%d/%02d/%02d", t.Year(), int(t.Month()), t.Day())
 }
 
-func red(in string) string {
+const (
+	redCode     = "\x1b[31m"
+	greenCode   = "\x1b[32m"
+	yellowCode  = "\x1b[33m"
+	blueCode    = "\x1b[34m"
+	magentaCode = "\x1b[35m"
+	cyanCode    = "\x1b[36m"
+	boldCode    = "\x1b[1m"
+
+	resetCode = "\x1b[0m"
+)
+
+func stylize(startCode, in string) string {
 	if useColor {
-		return "\x1b[31m" + in + "\x1b[0m"
+		return startCode + in + resetCode
 	}
 
 	return in
 }
 
+func red(in string) string {
+	return stylize(redCode, in)
+}
+
 func green(in string) string {
-	if useColor {
-		return "\x1b[32m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(greenCode, in)
 }
 
 func yellow(in string) string {
-	if useColor {
-		return "\x1b[33m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(yellowCode, in)
 }
 
 func blue(in string) string {
-	if useColor {
-		return "\x1b[34m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(blueCode, in)
 }
 
 func cyan(in string) string {
-	if useColor {
-		return "\x1b[36m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(cyanCode, in)
 }
 
 func magenta(in string) string {
-	if useColor {
-		return "\x1b[35m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(magentaCode, in)
 }
 
 func bold(in string) string {
-	if useColor {
-		return "\x1b[1m" + in + "\x1b[0m"
-	}
-
-	return in
+	return stylize(boldCode, in)
 }
 
 // Colours text using a hashing algorithm. The same text will always produce the

upgrade.go

@@ -5,6 +5,7 @@ import (
 	"sort"
 	"strings"
 	"sync"
+	"unicode"
 
 	alpm "github.com/jguer/go-alpm"
 	rpc "github.com/mikkeloscar/aur"
@@ -54,11 +55,11 @@ func (u upSlice) Less(i, j int) bool {
 
 	if found != nil {
 		return less
-	} else {
+	}
+
 	iRunes := []rune(u[i].Repository)
 	jRunes := []rune(u[j].Repository)
 	return lessRunes(iRunes, jRunes)
-	}
 
 }
 
@@ -74,13 +75,50 @@ func getVersionDiff(oldVersion, newversion string) (left, right string) {
 	}
 
 	if errOld == nil && errNew == nil {
-		if old.Version == new.Version {
-			left = string(old.Version) + "-" + red(string(old.Pkgrel))
-			right = string(new.Version) + "-" + green(string(new.Pkgrel))
-		} else {
-			left = red(string(old.Version)) + "-" + string(old.Pkgrel)
-			right = bold(green(string(new.Version))) + "-" + string(new.Pkgrel)
+		oldVersion := old.String()
+		newVersion := new.String()
+
+		if oldVersion == newVersion {
+			return oldVersion, newVersion
 		}
+
+		diffPosition := 0
+
+		checkWords := func(str string, index int, words ...string) bool {
+			for _, word := range words {
+				wordLength := len(word)
+				nextIndex := index + 1
+				if (index < len(str)-wordLength) &&
+					(str[nextIndex:(nextIndex+wordLength)] == word) {
+					return true
+				}
+			}
+			return false
+		}
+
+		for index, char := range oldVersion {
+			charIsSpecial := !(unicode.IsLetter(char) || unicode.IsNumber(char))
+
+			if (index >= len(newVersion)) || (char != rune(newVersion[index])) {
+				if charIsSpecial {
+					diffPosition = index
+				}
+				break
+			}
+
+			if charIsSpecial ||
+				(((index == len(oldVersion)-1) || (index == len(newVersion)-1)) &&
+					((len(oldVersion) != len(newVersion)) ||
+						(oldVersion[index] == newVersion[index]))) ||
+				checkWords(oldVersion, index, "rc", "pre", "alpha", "beta") {
+				diffPosition = index + 1
+			}
+		}
+
+		samePart := oldVersion[0:diffPosition]
+
+		left = samePart + red(oldVersion[diffPosition:len(oldVersion)])
+		right = samePart + green(newVersion[diffPosition:len(newVersion)])
 	}
 
 	return

upgrade_test.go

@@ -0,0 +1,56 @@
+package main
+
+import "testing"
+
+func TestGetVersionDiff(t *testing.T) {
+	useColor = true
+
+	type versionPair struct {
+		Old string
+		New string
+	}
+
+	in := []versionPair{
+		{"1-1", "1-1"},
+		{"1-1", "2-1"},
+		{"2-1", "1-1"},
+		{"1-1", "1-2"},
+		{"1-2", "1-1"},
+		{"1.2.3-1", "1.2.4-1"},
+		{"1.8rc1+6+g0f377f94-1", "1.8rc1+1+g7e949283-1"},
+		{"1.8rc1+6+g0f377f94-1", "1.8rc2+1+g7e949283-1"},
+		{"1.8rc2", "1.9rc1"},
+		{"2.99.917+812+g75795523-1", "2.99.917+823+gd9bf46e4-1"},
+		{"1.2.9-1", "1.2.10-1"},
+		{"1.2.10-1", "1.2.9-1"},
+		{"1.2-1", "1.2.1-1"},
+		{"1.2.1-1", "1.2-1"},
+		{"0.7-4", "0.7+4+gd8d8c67-1"},
+	}
+
+	out := []versionPair{
+		{"1-1", "1-1"},
+		{red("1-1"), green("2-1")},
+		{red("2-1"), green("1-1")},
+		{"1-" + red("1"), "1-" + green("2")},
+		{"1-" + red("2"), "1-" + green("1")},
+		{"1.2." + red("3-1"), "1.2." + green("4-1")},
+		{"1.8rc1+" + red("6+g0f377f94-1"), "1.8rc1+" + green("1+g7e949283-1")},
+		{"1.8" + red("rc1+6+g0f377f94-1"), "1.8" + green("rc2+1+g7e949283-1")},
+		{"1." + red("8rc2"), "1." + green("9rc1")},
+		{"2.99.917+" + red("812+g75795523-1"), "2.99.917+" + green("823+gd9bf46e4-1")},
+		{"1.2." + red("9-1"), "1.2." + green("10-1")},
+		{"1.2." + red("10-1"), "1.2." + green("9-1")},
+		{"1.2" + red("-1"), "1.2" + green(".1-1")},
+		{"1.2" + red(".1-1"), "1.2" + green("-1")},
+		{"0.7" + red("-4"), "0.7" + green("+4+gd8d8c67-1")},
+	}
+
+	for i, pair := range in {
+		o, n := getVersionDiff(pair.Old, pair.New)
+
+		if o != out[i].Old || n != out[i].New {
+			t.Errorf("Test %d failed for update: (%s => %s) expected (%s => %s) got (%s => %s)", i+1, in[i].Old, in[i].New, out[i].Old, out[i].New, o, n)
+		}
+	}
+}