initial

README.md

@@ -0,0 +1,15 @@
+# sneak/goutil
+
+This is a bunch of little general-purpose go utility functions that I don't
+feel comfortable including as-is in my normal projects as they are too
+general, so I put them here.
+
+Suggestions are welcome.
+
+# License
+
+WTFPL (free software, no restrictions)
+
+# Author
+
+* [sneak@sneak.berlin](mailto:sneak@sneak.berlin)

go.mod

@@ -0,0 +1,5 @@
+module git.eeqj.de/sneak/goutil
+
+go 1.14
+
+require github.com/hako/durafmt v0.0.0-20191009132224-3f39dc1ed9f4

go.sum

@@ -0,0 +1,2 @@
+github.com/hako/durafmt v0.0.0-20191009132224-3f39dc1ed9f4 h1:60gBOooTSmNtrqNaRvrDbi8VAne0REaek2agjnITKSw=
+github.com/hako/durafmt v0.0.0-20191009132224-3f39dc1ed9f4/go.mod h1:5Scbynm8dF1XAPwIwkGPqzkM/shndPm79Jd1003hTjE=

util.go

@@ -0,0 +1,45 @@
+package goutil
+
+import (
+	"errors"
+	"math"
+	"os"
+	"regexp"
+	"time"
+
+	"github.com/hako/durafmt"
+)
+
+func FilterToAlnum(input string) string {
+	re := regexp.MustCompile("[^a-zA-Z0-9]+")
+	return re.ReplaceAllString(input, "")
+}
+
+func TimeDiffHuman(first time.Time, second time.Time) string {
+	if first.Before(second) {
+		return durafmt.ParseShort(second.Sub(first)).String()
+	} else {
+		return durafmt.ParseShort(first.Sub(second)).String()
+	}
+}
+
+// Does anyone else use uints for things that are always >=0 like counts and
+func TimeDiffAbsSeconds(first time.Time, second time.Time) uint {
+	return uint(math.Abs(first.Sub(second).Truncate(time.Second).Seconds()))
+}
+
+func Mkdirp(p string) error {
+	src, err := os.Stat(p)
+	if os.IsNotExist(err) {
+		errDir := os.MkdirAll(p, 0755)
+		if errDir != nil {
+			return err
+		}
+
+		return nil
+	}
+	if src.Mode().IsRegular() {
+		return errors.New("file already exists at path")
+	}
+	return nil
+}