Review c85b6ebcd6e4

cat << 'EOF' > cmd/corral/ledger_append_bug_test.go
package main

import (
	"bytes"
	"compress/gzip"
	"os"
	"path/filepath"
	"testing"
)

func TestLedgerAppendInPlaceRelativeDir(t *testing.T) {
	tmp, err := os.MkdirTemp("", "ledger_test")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tmp)

	ledgerDir := filepath.Join(tmp, "myledger")
	scansDir := filepath.Join(ledgerDir, "scans")
	if err := os.MkdirAll(scansDir, 0755); err != nil {
		t.Fatal(err)
	}

	entryPath := filepath.Join(scansDir, "entry.json.gz")
	f, err := os.Create(entryPath)
	if err != nil {
		t.Fatal(err)
	}
	gw := gzip.NewWriter(f)
	gw.Write([]byte("{}"))
	gw.Close()
	f.Close()

	origWd, _ := os.Getwd()
	defer os.Chdir(origWd)
	if err := os.Chdir(tmp); err != nil {
		t.Fatal(err)
	}

	var stdout, stderr bytes.Buffer
	code := runLedgerAppend([]string{"myledger/scans/entry.json.gz", "myledger"}, &stdout, &stderr)

	if code != 2 {
		t.Errorf("DEFECT DEMONSTRATED: expected exit status 2 when appending in-place entry with relative dir, got status %d (stderr: %q)", code, stderr.String())
	}
}
EOF
OUTPUT=$(go test ./cmd/corral -run TestLedgerAppendInPlaceRelativeDir 2>&1)
if echo "$OUTPUT" | grep -q "DEFECT DEMONSTRATED"; then
    echo "$OUTPUT"
    exit 0
else
    echo "Defect not demonstrated"
    exit 1
fi

--- FAIL: TestLedgerAppendInPlaceRelativeDir (0.00s)
    ledger_append_bug_test.go:44: DEFECT DEMONSTRATED: expected exit status 2 when appending in-place entry with relative dir, got status 1 (stderr: "corral ledger append: auditpush: entry.json.gz: format \"\", want \"corral-ledger-2\"
")
FAIL
FAIL	github.com/pdbethke/corralai/cmd/corral	0.012s
FAIL