replace use of shell w/ direct calls

internal/zfs/zfs.go

@@ -10,6 +10,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"git.gentoo.party/sam/thanks/internal/runner"
 )
 
 type Snapshot struct {
@@ -113,3 +115,49 @@ func Snapshots(ctx context.Context, target string) ([]Snapshot, error) {
 
 	return snaps, err
 }
+
+func FullSend(ctx context.Context, snap, sshTarget, target string) ([]byte, error) {
+	return runner.Pipeline(
+		exec.CommandContext(
+			ctx,
+			"zfs",
+			"send",
+			"-Lec",
+			snap,
+		),
+		exec.CommandContext(
+			ctx,
+			"ssh",
+			sshTarget,
+			"zfs",
+			"recv",
+			"-Fu",
+			target,
+		),
+	)
+}
+
+func IncrementalSend(ctx context.Context, prevSnapName, newSnapName, sshTarget, target string) ([]byte, error) {
+	return runner.Pipeline(
+		exec.CommandContext(
+			ctx,
+			"zfs",
+			"send",
+			fmt.Sprintf("-I@%s", prevSnapName),
+			newSnapName,
+		),
+		exec.CommandContext(
+			ctx,
+			"ssh",
+			sshTarget,
+			"zfs",
+			"recv",
+			target,
+		),
+	)
+}
+
+func Destroy(ctx context.Context, target string) ([]byte, error) {
+	cmd := exec.CommandContext(ctx, "zfs", "destroy", target)
+	return cmd.CombinedOutput()
+}