init

Author: Azathothas

.github/dependabot.yaml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"

go.mod

@@ -0,0 +1,3 @@
+module github.com/pkgforge-security/comb
+
+go 1.23.1

main.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"os"
+)
+
+func main() {
+	var flip bool
+	flag.BoolVar(&flip, "f", false, "")
+	flag.BoolVar(&flip, "flip", false, "")
+
+	var separator string
+	flag.StringVar(&separator, "s", "", "")
+	flag.StringVar(&separator, "separator", "", "")
+
+	flag.Parse()
+
+	if flag.NArg() < 2 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	prefixFile, err := os.Open(flag.Arg(0))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s\n", err)
+		os.Exit(1)
+	}
+
+	suffixFile, err := os.Open(flag.Arg(1))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s\n", err)
+		os.Exit(1)
+	}
+
+	// use 'a' and 'b' because which is the prefix
+	// and which is the suffix depends on if we're in
+	// flip mode or not.
+	fileA := prefixFile
+	fileB := suffixFile
+
+	if flip {
+		fileA, fileB = fileB, fileA
+	}
+
+	a := bufio.NewScanner(fileA)
+	for a.Scan() {
+		// rewind file B so we can scan it again
+		fileB.Seek(0, 0)
+
+		b := bufio.NewScanner(fileB)
+		for b.Scan() {
+			if flip {
+				fmt.Printf("%s%s%s\n", b.Text(), separator, a.Text())
+			} else {
+				fmt.Printf("%s%s%s\n", a.Text(), separator, b.Text())
+			}
+		}
+	}
+
+}
+
+func init() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Combine the lines from two files in every combination\n\n")
+		fmt.Fprintf(os.Stderr, "Usage:\n")
+		fmt.Fprintf(os.Stderr, "  comb [OPTIONS] <prefixfile> <suffixfile>\n\n")
+		fmt.Fprintf(os.Stderr, "Options:\n")
+		fmt.Fprintf(os.Stderr, "  -f, --flip             Flip mode (order by suffix)\n")
+		fmt.Fprintf(os.Stderr, "  -s, --separator <str>  String to place between prefix and suffix\n")
+	}
+}