refactor into smaller functions

gitcommands.go

@@ -480,27 +480,17 @@ func gitCurrentBranchName() string {
 	return strings.TrimSpace(branchName)
 }
 
-func getBranches() []Branch {
-	branches := make([]Branch, 0)
-	rawString, err := runDirectCommand("git reflog -n100 --pretty='%cr|%gs' --grep-reflog='checkout: moving' HEAD")
-	if err != nil {
-		return branches
-	}
-
-	branchLines := splitLines(rawString)
-	for i, line := range branchLines {
+// A line will have the form '10 days ago master' so we need to strip out the
+// useful information from that into timeNumber, timeUnit, and branchName
+func branchInfoFromLine(line string) (string, string, string) {
 	r := regexp.MustCompile("\\|.*\\s")
 	line = r.ReplaceAllString(line, " ")
 	words := strings.Split(line, " ")
-		timeNumber := words[0]
-		timeUnit := words[1]
-		branchName := words[3]
-
-		if branchAlreadyStored(branchName, branches) {
-			continue
+	return words[0], words[1], words[3]
 }
 
-		r = regexp.MustCompile("s$")
+func abbreviatedTimeUnit(timeUnit string) string {
+	r := regexp.MustCompile("s$")
 	timeUnit = r.ReplaceAllString(timeUnit, "")
 	timeUnitMap := map[string]string{
 		"hour":   "h",
@@ -511,7 +501,24 @@ func getBranches() []Branch {
 		"day":    "d",
 		"month":  "m",
 	}
-		timeUnit = timeUnitMap[timeUnit]
+	return timeUnitMap[timeUnit]
+}
+
+func getBranches() []Branch {
+	branches := make([]Branch, 0)
+	rawString, err := runDirectCommand("git reflog -n100 --pretty='%cr|%gs' --grep-reflog='checkout: moving' HEAD")
+	if err != nil {
+		return branches
+	}
+
+	branchLines := splitLines(rawString)
+	for i, line := range branchLines {
+		timeNumber, timeUnit, branchName := branchInfoFromLine(line)
+		timeUnit = abbreviatedTimeUnit(timeUnit)
+
+		if branchAlreadyStored(branchName, branches) {
+			continue
+		}
 
 		branch := constructBranch(timeNumber+timeUnit, branchName, i)
 		branches = append(branches, branch)