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|
package cmd
import (
"golang.flu0r1ne.net/zsu/snap"
"os/exec"
"os"
"io"
"log"
"fmt"
"errors"
)
func Diff(params []string) {
if(len(params) == 0) {
die.Fatal("Reference file is required")
}
if(len(params) > 2) {
die.Fatal("Too many arguments provided")
}
reference := params[0]
from, to := snap.ToRelative("@-"), snap.ToRelative("@")
if len(params) > 1 {
from, to = snap.ParseDiff(params[1])
}
oracle := snap.GetOracle(reference)
fromPath := oracle.PathTo(from)
toPath := oracle.PathTo(to)
_, noColor := os.LookupEnv("NO_COLOR")
colorOpt := "--color=always"
if noColor {
colorOpt = "--color=never"
}
diff := exec.Command("diff", colorOpt, fromPath, toPath)
diff.Env = os.Environ()
stderr, err := diff.StderrPipe()
if err != nil {
log.Fatal(err);
}
stdout, err := diff.StdoutPipe()
if err != nil {
log.Fatal(err);
}
if err := diff.Start(); err != nil {
log.Fatal(err)
}
outtext, _ := io.ReadAll(stdout)
errtext, _ := io.ReadAll(stderr)
fmt.Fprintf(os.Stderr, "%s", errtext)
fmt.Fprintf(os.Stdout, "%s", outtext)
if err := diff.Wait(); err != nil {
var exiterr *exec.ExitError
// GNU Diff exits 1 if the files differ
if errors.As(err, &exiterr) && exiterr.ExitCode() == 1 {
os.Exit(exiterr.ExitCode())
}
die.Fatalf("Error encountered while executing diff.")
os.Exit(2)
}
}
|
