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-rw-r--r--utils/binary/read_test.go2
-rw-r--r--utils/fs/memory/memory.go354
-rw-r--r--utils/fs/memory/memory_test.go33
-rw-r--r--utils/fs/os/os.go6
-rw-r--r--utils/fs/os/os_test.go2
-rw-r--r--utils/fs/test/fs_suite.go43
6 files changed, 435 insertions, 5 deletions
diff --git a/utils/binary/read_test.go b/utils/binary/read_test.go
index 6579ffb..ad5ef29 100644
--- a/utils/binary/read_test.go
+++ b/utils/binary/read_test.go
@@ -6,7 +6,7 @@ import (
"testing"
. "gopkg.in/check.v1"
- "gopkg.in/src-d/go-git.v3/core"
+ "gopkg.in/src-d/go-git.v4/core"
)
func Test(t *testing.T) { TestingT(t) }
diff --git a/utils/fs/memory/memory.go b/utils/fs/memory/memory.go
new file mode 100644
index 0000000..08a9599
--- /dev/null
+++ b/utils/fs/memory/memory.go
@@ -0,0 +1,354 @@
+package memory
+
+import (
+ "errors"
+ "fmt"
+ "io"
+ "os"
+ "path/filepath"
+ "strings"
+ "time"
+
+ "gopkg.in/src-d/go-git.v4/utils/fs"
+)
+
+const separator = '/'
+
+// Memory a very convenient filesystem based on memory files
+type Memory struct {
+ base string
+ s *storage
+ tempCount int
+}
+
+//New returns a new Memory filesystem
+func New() *Memory {
+ return &Memory{
+ base: "/",
+ s: &storage{make(map[string]*file, 0)},
+ }
+}
+
+func (fs *Memory) Create(filename string) (fs.File, error) {
+ return fs.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0)
+}
+
+func (fs *Memory) Open(filename string) (fs.File, error) {
+ return fs.OpenFile(filename, os.O_RDONLY, 0)
+}
+
+func (fs *Memory) OpenFile(filename string, flag int, perm os.FileMode) (fs.File, error) {
+ fullpath := fs.Join(fs.base, filename)
+ f, ok := fs.s.files[fullpath]
+ if !ok && !isCreate(flag) {
+ return nil, os.ErrNotExist
+ }
+
+ if f == nil {
+ fs.s.files[fullpath] = newFile(fs.base, fullpath, flag)
+ return fs.s.files[fullpath], nil
+ }
+
+ n := newFile(fs.base, fullpath, flag)
+ n.content = f.content
+
+ if isAppend(flag) {
+ n.position = int64(n.content.Len())
+ }
+
+ if isTruncate(flag) {
+ n.content.Truncate()
+ }
+
+ return n, nil
+}
+
+func (fs *Memory) Stat(filename string) (fs.FileInfo, error) {
+ fullpath := fs.Join(fs.base, filename)
+
+ if _, ok := fs.s.files[filename]; ok {
+ return newFileInfo(fs.base, fullpath, fs.s.files[filename].content.Len()), nil
+ }
+
+ info, err := fs.ReadDir(filename)
+ if err == nil && len(info) != 0 {
+ return newFileInfo(fs.base, fullpath, len(info)), nil
+ }
+
+ return nil, os.ErrNotExist
+}
+
+func (fs *Memory) ReadDir(base string) (entries []fs.FileInfo, err error) {
+ base = fs.Join(fs.base, base)
+
+ appendedDirs := make(map[string]bool, 0)
+ for fullpath, f := range fs.s.files {
+ if !strings.HasPrefix(fullpath, base) {
+ continue
+ }
+
+ fullpath, _ = filepath.Rel(base, fullpath)
+ parts := strings.Split(fullpath, string(separator))
+
+ if len(parts) == 1 {
+ entries = append(entries, newFileInfo(fs.base, fullpath, f.content.Len()))
+ continue
+ }
+
+ if _, ok := appendedDirs[parts[0]]; ok {
+ continue
+ }
+
+ entries = append(entries, &fileInfo{name: parts[0], isDir: true})
+ appendedDirs[parts[0]] = true
+ }
+
+ return
+}
+
+var maxTempFiles = 1024 * 4
+
+func (fs *Memory) TempFile(dir, prefix string) (fs.File, error) {
+ var fullpath string
+ for {
+ if fs.tempCount >= maxTempFiles {
+ return nil, errors.New("max. number of tempfiles reached")
+ }
+
+ fullpath = fs.getTempFilename(dir, prefix)
+ if _, ok := fs.s.files[fullpath]; !ok {
+ break
+ }
+ }
+
+ return fs.Create(fullpath)
+}
+
+func (fs *Memory) getTempFilename(dir, prefix string) string {
+ fs.tempCount++
+ filename := fmt.Sprintf("%s_%d_%d", prefix, fs.tempCount, time.Now().UnixNano())
+ return fs.Join(fs.base, dir, filename)
+}
+
+func (fs *Memory) Rename(from, to string) error {
+ from = fs.Join(fs.base, from)
+ to = fs.Join(fs.base, to)
+
+ if _, ok := fs.s.files[from]; !ok {
+ return os.ErrNotExist
+ }
+
+ fs.s.files[to] = fs.s.files[from]
+ fs.s.files[to].BaseFilename = to
+ delete(fs.s.files, from)
+
+ return nil
+}
+
+func (fs *Memory) Remove(filename string) error {
+ fullpath := fs.Join(fs.base, filename)
+ if _, ok := fs.s.files[fullpath]; !ok {
+ return os.ErrNotExist
+ }
+
+ delete(fs.s.files, fullpath)
+ return nil
+}
+
+func (fs *Memory) Join(elem ...string) string {
+ return filepath.Join(elem...)
+}
+
+func (fs *Memory) Dir(path string) fs.Filesystem {
+ return &Memory{
+ base: fs.Join(fs.base, path),
+ s: fs.s,
+ }
+}
+
+func (fs *Memory) Base() string {
+ return fs.base
+}
+
+type file struct {
+ fs.BaseFile
+
+ content *content
+ position int64
+ flag int
+}
+
+func newFile(base, fullpath string, flag int) *file {
+ filename, _ := filepath.Rel(base, fullpath)
+
+ return &file{
+ BaseFile: fs.BaseFile{BaseFilename: filename},
+ content: &content{},
+ flag: flag,
+ }
+}
+
+func (f *file) Read(b []byte) (int, error) {
+ if f.IsClosed() {
+ return 0, fs.ErrClosed
+ }
+
+ if !isReadAndWrite(f.flag) && !isReadOnly(f.flag) {
+ return 0, errors.New("read not supported")
+ }
+
+ n, err := f.content.ReadAt(b, f.position)
+ f.position += int64(n)
+
+ return n, err
+}
+
+func (f *file) Seek(offset int64, whence int) (int64, error) {
+ if f.IsClosed() {
+ return 0, fs.ErrClosed
+ }
+
+ switch whence {
+ case io.SeekCurrent:
+ f.position += offset
+ case io.SeekStart:
+ f.position = offset
+ case io.SeekEnd:
+ f.position = int64(f.content.Len()) - offset
+ }
+
+ return f.position, nil
+}
+
+func (f *file) Write(p []byte) (int, error) {
+ if f.IsClosed() {
+ return 0, fs.ErrClosed
+ }
+
+ if !isReadAndWrite(f.flag) && !isWriteOnly(f.flag) {
+ return 0, errors.New("write not supported")
+ }
+
+ n, err := f.content.WriteAt(p, f.position)
+ f.position += int64(n)
+
+ return n, err
+}
+
+func (f *file) Close() error {
+ if f.IsClosed() {
+ return errors.New("file already closed")
+ }
+
+ f.Closed = true
+ return nil
+}
+
+func (f *file) Open() error {
+ f.Closed = false
+ return nil
+}
+
+type fileInfo struct {
+ name string
+ size int
+ isDir bool
+}
+
+func newFileInfo(base, fullpath string, size int) *fileInfo {
+ filename, _ := filepath.Rel(base, fullpath)
+
+ return &fileInfo{
+ name: filename,
+ size: size,
+ }
+}
+
+func (fi *fileInfo) Name() string {
+ return fi.name
+}
+
+func (fi *fileInfo) Size() int64 {
+ return int64(fi.size)
+}
+
+func (fi *fileInfo) Mode() os.FileMode {
+ return os.FileMode(0)
+}
+
+func (*fileInfo) ModTime() time.Time {
+ return time.Now()
+}
+
+func (fi *fileInfo) IsDir() bool {
+ return fi.isDir
+}
+
+func (*fileInfo) Sys() interface{} {
+ return nil
+}
+
+type storage struct {
+ files map[string]*file
+}
+
+type content struct {
+ bytes []byte
+}
+
+func (c *content) WriteAt(p []byte, off int64) (int, error) {
+ prev := len(c.bytes)
+ c.bytes = append(c.bytes[:off], p...)
+ if len(c.bytes) < prev {
+ c.bytes = c.bytes[:prev]
+ }
+
+ return len(p), nil
+}
+
+func (c *content) ReadAt(b []byte, off int64) (int, error) {
+ size := int64(len(c.bytes))
+ if off >= size {
+ return 0, io.EOF
+ }
+
+ l := int64(len(b))
+ if off+l > size {
+ l = size - off
+ }
+
+ n := copy(b, c.bytes[off:off+l])
+ return n, nil
+}
+
+func (c *content) Truncate() {
+ c.bytes = make([]byte, 0)
+}
+
+func (c *content) Len() int {
+ return len(c.bytes)
+}
+
+func isCreate(flag int) bool {
+ return flag&os.O_CREATE != 0
+}
+
+func isAppend(flag int) bool {
+ return flag&os.O_APPEND != 0
+}
+
+func isTruncate(flag int) bool {
+ return flag&os.O_TRUNC != 0
+}
+
+func isReadAndWrite(flag int) bool {
+ return flag&os.O_RDWR != 0
+}
+
+func isReadOnly(flag int) bool {
+ return flag == os.O_RDONLY
+}
+
+func isWriteOnly(flag int) bool {
+ return flag&os.O_WRONLY != 0
+}
diff --git a/utils/fs/memory/memory_test.go b/utils/fs/memory/memory_test.go
new file mode 100644
index 0000000..4645fe7
--- /dev/null
+++ b/utils/fs/memory/memory_test.go
@@ -0,0 +1,33 @@
+package memory
+
+import (
+ "testing"
+
+ . "gopkg.in/check.v1"
+ "gopkg.in/src-d/go-git.v4/utils/fs/test"
+)
+
+func Test(t *testing.T) { TestingT(t) }
+
+type MemorySuite struct {
+ test.FilesystemSuite
+ path string
+}
+
+var _ = Suite(&MemorySuite{})
+
+func (s *MemorySuite) SetUpTest(c *C) {
+ s.FilesystemSuite.Fs = New()
+}
+
+func (s *MemorySuite) TestTempFileMaxTempFiles(c *C) {
+ for i := 0; i < maxTempFiles; i++ {
+ f, err := s.FilesystemSuite.Fs.TempFile("", "")
+ c.Assert(err, IsNil)
+ c.Assert(f, NotNil)
+ }
+
+ f, err := s.FilesystemSuite.Fs.TempFile("", "")
+ c.Assert(err, NotNil)
+ c.Assert(f, IsNil)
+}
diff --git a/utils/fs/os/os.go b/utils/fs/os/os.go
index 02395d6..3ff825e 100644
--- a/utils/fs/os/os.go
+++ b/utils/fs/os/os.go
@@ -14,8 +14,8 @@ type OS struct {
base string
}
-// NewOS returns a new OS filesystem
-func NewOS(baseDir string) *OS {
+// New returns a new OS filesystem
+func New(baseDir string) *OS {
return &OS{
base: baseDir,
}
@@ -139,7 +139,7 @@ func (fs *OS) Join(elem ...string) string {
// Dir returns a new Filesystem from the same type of fs using as baseDir the
// given path
func (fs *OS) Dir(path string) fs.Filesystem {
- return NewOS(fs.Join(fs.base, path))
+ return New(fs.Join(fs.base, path))
}
// Base returns the base path of the filesytem
diff --git a/utils/fs/os/os_test.go b/utils/fs/os/os_test.go
index 02a0a6c..756e284 100644
--- a/utils/fs/os/os_test.go
+++ b/utils/fs/os/os_test.go
@@ -21,7 +21,7 @@ var _ = Suite(&OSSuite{})
func (s *OSSuite) SetUpTest(c *C) {
s.path, _ = ioutil.TempDir(stdos.TempDir(), "go-git-os-fs-test")
- s.FilesystemSuite.Fs = os.NewOS(s.path)
+ s.FilesystemSuite.Fs = os.New(s.path)
}
func (s *OSSuite) TearDownTest(c *C) {
err := stdos.RemoveAll(s.path)
diff --git a/utils/fs/test/fs_suite.go b/utils/fs/test/fs_suite.go
index 4c0fd09..74301f5 100644
--- a/utils/fs/test/fs_suite.go
+++ b/utils/fs/test/fs_suite.go
@@ -2,6 +2,7 @@ package test
import (
"fmt"
+ "io"
"io/ioutil"
"os"
"strings"
@@ -184,6 +185,32 @@ func (s *FilesystemSuite) testReadClose(c *C, f File, content string) {
c.Assert(f.Close(), IsNil)
}
+func (s *FilesystemSuite) TestFileReadSeek(c *C) {
+ f, err := s.Fs.Create("foo")
+ c.Assert(err, IsNil)
+
+ n, err := f.Write([]byte("0123456789abcdefghijklmnopqrstuvwxyz"))
+ c.Assert(err, IsNil)
+ c.Assert(n, Equals, 36)
+
+ p, err := f.Seek(10, io.SeekStart)
+ c.Assert(err, IsNil)
+ c.Assert(int(p), Equals, 10)
+
+ all, err := ioutil.ReadAll(f)
+ c.Assert(err, IsNil)
+ c.Assert(string(all), Equals, "abcdefghijklmnopqrstuvwxyz")
+ c.Assert(f.Close(), IsNil)
+}
+
+func (s *FilesystemSuite) TestFileCloseTwice(c *C) {
+ f, err := s.Fs.Create("foo")
+ c.Assert(err, IsNil)
+
+ c.Assert(f.Close(), IsNil)
+ c.Assert(f.Close(), NotNil)
+}
+
func (s *FilesystemSuite) TestReadDirAndDir(c *C) {
files := []string{"foo", "bar", "qux/baz", "qux/qux"}
for _, name := range files {
@@ -268,6 +295,20 @@ func (s *FilesystemSuite) TestTempFileFullWithPath(c *C) {
c.Assert(strings.HasPrefix(f.Filename(), s.Fs.Join("foo", "bar")), Equals, true)
}
+func (s *FilesystemSuite) TestOpenAndWrite(c *C) {
+ f, err := s.Fs.Create("foo")
+ c.Assert(err, IsNil)
+ c.Assert(f.Close(), IsNil)
+
+ foo, err := s.Fs.Open("foo")
+ c.Assert(foo, NotNil)
+ c.Assert(err, IsNil)
+
+ n, err := foo.Write([]byte("foo"))
+ c.Assert(err, NotNil)
+ c.Assert(n, Equals, 0)
+}
+
func (s *FilesystemSuite) TestOpenAndStat(c *C) {
f, err := s.Fs.Create("foo")
c.Assert(err, IsNil)
@@ -299,6 +340,8 @@ func (s *FilesystemSuite) TestRemoveNonExisting(c *C) {
func (s *FilesystemSuite) TestRemoveTempFile(c *C) {
f, err := s.Fs.TempFile("test-dir", "test-prefix")
+ c.Assert(err, IsNil)
+
fn := f.Filename()
c.Assert(err, IsNil)
c.Assert(f.Close(), IsNil)
generated by cgit (git 2.34.1) at 2024-11-10 16:25:17 +0000