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package extract_test
import (
"fmt"
"os"
)
// LoggingFS is a disk that logs every operation, useful for unit-testing.
type LoggingFS struct {
Journal []*LoggedOp
}
// LoggedOp is an operation logged in a LoggingFS journal.
type LoggedOp struct {
Op string
Path string
OldPath string
Mode os.FileMode
Info os.FileInfo
Flags int
Err error
}
func (op *LoggedOp) String() string {
res := ""
switch op.Op {
case "link":
res += fmt.Sprintf("link %s -> %s", op.Path, op.OldPath)
case "symlink":
res += fmt.Sprintf("symlink %s -> %s", op.Path, op.OldPath)
case "mkdirall":
res += fmt.Sprintf("mkdirall %v %s", op.Mode, op.Path)
case "open":
res += fmt.Sprintf("open %v %s (flags=%04x)", op.Mode, op.Path, op.Flags)
case "remove":
res += fmt.Sprintf("remove %v", op.Path)
case "stat":
res += fmt.Sprintf("stat %v -> %v", op.Path, op.Info)
case "chmod":
res += fmt.Sprintf("chmod %v %s", op.Mode, op.Path)
default:
panic("unknown LoggedOP " + op.Op)
}
if op.Err != nil {
res += " error: " + op.Err.Error()
} else {
res += " success"
}
return res
}
func (m *LoggingFS) Link(oldname, newname string) error {
err := os.Link(oldname, newname)
op := &LoggedOp{
Op: "link",
OldPath: oldname,
Path: newname,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return err
}
func (m *LoggingFS) MkdirAll(path string, perm os.FileMode) error {
err := os.MkdirAll(path, perm)
op := &LoggedOp{
Op: "mkdirall",
Path: path,
Mode: perm,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return err
}
func (m *LoggingFS) Symlink(oldname, newname string) error {
err := os.Symlink(oldname, newname)
op := &LoggedOp{
Op: "symlink",
OldPath: oldname,
Path: newname,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return err
}
func (m *LoggingFS) OpenFile(name string, flags int, perm os.FileMode) (*os.File, error) {
f, err := os.OpenFile(name, flags, perm)
op := &LoggedOp{
Op: "open",
Path: name,
Mode: perm,
Flags: flags,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return f, err
}
func (m *LoggingFS) Remove(path string) error {
err := os.Remove(path)
op := &LoggedOp{
Op: "remove",
Path: path,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return err
}
func (m *LoggingFS) Stat(path string) (os.FileInfo, error) {
info, err := os.Stat(path)
op := &LoggedOp{
Op: "stat",
Path: path,
Info: info,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return info, err
}
func (m *LoggingFS) Chmod(path string, mode os.FileMode) error {
err := os.Chmod(path, mode)
op := &LoggedOp{
Op: "chmod",
Path: path,
Mode: mode,
Err: err,
}
m.Journal = append(m.Journal, op)
fmt.Println("FS>", op)
return err
}
func (m *LoggingFS) String() string {
res := ""
for _, op := range m.Journal {
res += op.String()
res += "\n"
}
return res
}
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