The easiest way to achieve this is to write something like cat ~/.ssh/config_* >> ~/.ssh/config in the shell or add an alias, but that’s not so funny.
Usage
ssh-merge-config ~/.ssh/config.d/ ~/.ssh/config
The first parameter is the source folder to read and the second parameter is the destination file.
Output
~ ssh-merge-config ~/.ssh/config.d/ ~/.ssh/config
done
That’s it. The code is on GitHub https://github.com/mnlwldr/ssh-merge-config.
package main
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
"time"
)
func main() {
name := os.Args[0]
if len(os.Args) < 3 {
help(name)
os.Exit(255)
}
directory := os.Args[1]
output := os.Args[2]
if _, err := os.Stat(directory); os.IsNotExist(err) {
log.Printf("%s does not exist", directory)
os.Exit(255)
}
files, err := ioutil.ReadDir(directory)
checkErr(err)
var content bytes.Buffer
for _, f := range files {
readFile,err := ioutil.ReadFile(directory + string(os.PathSeparator) + f.Name())
checkErr(err)
content.WriteString(string(readFile))
}
if _, err := os.Stat(output); err == nil {
backup(output)
}
out, err := os.Create(output)
checkErr(err)
defer func(out *os.File) {
err := out.Close()
checkErr(err)
}(out)
_, err2 := out.WriteString(content.String())
checkErr(err2)
fmt.Println("done")
}
func checkErr(err error) {
if err != nil {
log.Fatal(err)
}
}
func help(name string) {
fmt.Printf("Usage: %s [input directory] [output file]\n", name)
fmt.Println("Example: ")
fmt.Printf("\t %s ~/.ssh/config.d/ ~/.ssh/config\n", name)
}
func backup(filename string) {
var backupFile bytes.Buffer
backupFile.WriteString(filename)
backupFile.WriteString(".")
backupFile.WriteString(time.Now().Format("20060102"))
err := os.Rename(filename, backupFile.String())
if err != nil {
checkErr(err)
}
}
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