remove gox/timex dependency

go.mod

@@ -3,7 +3,6 @@ module github.com/pete911/certinfo
 go 1.23
 
 require (
-	github.com/icza/gox v0.2.0
 	github.com/stretchr/testify v1.10.0
 	golang.design/x/clipboard v0.7.0
 )

go.sum

@@ -1,7 +1,5 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/icza/gox v0.2.0 h1:+0N8PCt9/QSx+k0dqe/wdlXJNR/haaPsPwrTJTNDeyk=
-github.com/icza/gox v0.2.0/go.mod h1:rVecw5Q6POJAWBcXgCZdAtwK/hmoNehxCkAP3sMnOIc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=

pkg/print/expiry.go

@@ -2,7 +2,6 @@ package print
 
 import (
 	"fmt"
-	"github.com/icza/gox/timex"
 	"github.com/pete911/certinfo/pkg/cert"
 	"time"
 )
@@ -40,7 +39,7 @@ func expiryString(certificate cert.Certificate) string {
 
 func formatExpiry(t time.Time) string {
 
-	year, month, day, hour, minute, _ := timex.Diff(time.Now(), t)
+	year, month, day, hour, minute, _ := timeDiff(time.Now(), t)
 	if year != 0 {
 		return fmt.Sprintf("%d years %d months %d days %d hours %d minutes", year, month, day, hour, minute)
 	}
@@ -55,3 +54,52 @@ func formatExpiry(t time.Time) string {
 	}
 	return fmt.Sprintf("%d minutes", minute)
 }
+
+// copied from github.com/icza/gox/timex Diff function
+func timeDiff(a, b time.Time) (year, month, day, hour, min, sec int) {
+
+	if a.Location() != b.Location() {
+		b = b.In(a.Location())
+	}
+	if a.After(b) {
+		a, b = b, a
+	}
+	y1, M1, d1 := a.Date()
+	y2, M2, d2 := b.Date()
+
+	h1, m1, s1 := a.Clock()
+	h2, m2, s2 := b.Clock()
+
+	year = y2 - y1
+	month = int(M2 - M1)
+	day = d2 - d1
+	hour = h2 - h1
+	min = m2 - m1
+	sec = s2 - s1
+
+	// Normalize negative values
+	if sec < 0 {
+		sec += 60
+		min--
+	}
+	if min < 0 {
+		min += 60
+		hour--
+	}
+	if hour < 0 {
+		hour += 24
+		day--
+	}
+	if day < 0 {
+		// days in month:
+		t := time.Date(y1, M1, 32, 0, 0, 0, 0, time.UTC)
+		day += 32 - t.Day()
+		month--
+	}
+	if month < 0 {
+		month += 12
+		year--
+	}
+
+	return
+}