git.iko.soy/crush
on baad28a help sign in
crush/internal/diff/diff.go
34 lines 953 B history raw
1package diff
3import (
4 "strings"
6 "github.com/aymanbagabas/go-udiff"
7 "github.com/charmbracelet/crush/internal/config"
8)
10// GenerateDiff creates a unified diff from two file contents
11func GenerateDiff(beforeContent, afterContent, fileName string) (string, int, int) {
12 // remove the cwd prefix and ensure consistent path format
13 // this prevents issues with absolute paths in different environments
14 cwd := config.WorkingDirectory()
15 fileName = strings.TrimPrefix(fileName, cwd)
16 fileName = strings.TrimPrefix(fileName, "/")
18 var (
19 unified = udiff.Unified("a/"+fileName, "b/"+fileName, beforeContent, afterContent)
20 additions = 0
21 removals = 0
22 )
24 lines := strings.SplitSeq(unified, "\n")
25 for line := range lines {
26 if strings.HasPrefix(line, "+") && !strings.HasPrefix(line, "+++") {
27 additions++
28 } else if strings.HasPrefix(line, "-") && !strings.HasPrefix(line, "---") {
29 removals++
30 }
31 }
33 return unified, additions, removals