func (*SymlinkSuite) TestIsSymlinkFileDoesNotExist(c *gc.C) {
dir := c.MkDir()
target := filepath.Join(dir, "file")
isSymlink, err := symlink.IsSymlink(target)
c.Assert(err, gc.ErrorMatches, ".*"+utils.NoSuchFileErrRegexp)
c.Assert(isSymlink, jc.IsFalse)
}
func (*SymlinkSuite) TestIsSymlinkFalseFolder(c *gc.C) {
target, err := symlink.GetLongPathAsString(c.MkDir())
c.Assert(err, gc.IsNil)
_, err = os.Stat(target)
c.Assert(err, gc.IsNil)
isSymlink, err := symlink.IsSymlink(target)
c.Assert(err, gc.IsNil)
c.Assert(isSymlink, jc.IsFalse)
}
func (*SymlinkSuite) TestIsSymlinkFalseFile(c *gc.C) {
dir := c.MkDir()
target := filepath.Join(dir, "file")
err := ioutil.WriteFile(target, []byte("TOP SECRET"), 0644)
c.Assert(err, gc.IsNil)
_, err = os.Stat(target)
c.Assert(err, gc.IsNil)
isSymlink, err := symlink.IsSymlink(target)
c.Assert(err, gc.IsNil)
c.Assert(isSymlink, jc.IsFalse)
}
func (*SymlinkSuite) TestIsSymlinkFolder(c *gc.C) {
target, err := symlink.GetLongPathAsString(c.MkDir())
c.Assert(err, gc.IsNil)
link := filepath.Join(target, "link")
_, err = os.Stat(target)
c.Assert(err, gc.IsNil)
err = symlink.New(target, link)
c.Assert(err, gc.IsNil)
isSymlink, err := symlink.IsSymlink(link)
c.Assert(err, gc.IsNil)
c.Assert(isSymlink, jc.IsTrue)
}
func (*SymlinkSuite) TestIsSymlinkFile(c *gc.C) {
dir, err := symlink.GetLongPathAsString(c.MkDir())
c.Assert(err, gc.IsNil)
target := filepath.Join(dir, "file")
err = ioutil.WriteFile(target, []byte("TOP SECRET"), 0644)
c.Assert(err, gc.IsNil)
link := filepath.Join(dir, "link")
_, err = os.Stat(target)
c.Assert(err, gc.IsNil)
err = symlink.New(target, link)
c.Assert(err, gc.IsNil)
isSymlink, err := symlink.IsSymlink(link)
c.Assert(err, gc.IsNil)
c.Assert(isSymlink, jc.IsTrue)
}
// EnsureSymlinks creates a symbolic link to jujuc within dir for each
// hook command. If the commands already exist, this operation does nothing.
// If dir is a symbolic link, it will be dereferenced first.
func EnsureSymlinks(dir string) (err error) {
logger.Infof("ensure jujuc symlinks in %s", dir)
defer func() {
if err != nil {
err = errors.Annotatef(err, "cannot initialize hook commands in %q", dir)
}
}()
isSymlink, err := symlink.IsSymlink(dir)
if err != nil {
return err
}
if isSymlink {
link, err := symlink.Read(dir)
if err != nil {
return err
}
if !filepath.IsAbs(link) {
logger.Infof("%s is relative", link)
link = filepath.Join(filepath.Dir(dir), link)
}
dir = link
logger.Infof("was a symlink, now looking at %s", dir)
}
jujudPath := filepath.Join(dir, names.Jujud)
logger.Debugf("jujud path %s", jujudPath)
for _, name := range CommandNames() {
// The link operation fails when the target already exists,
// so this is a no-op when the command names already
// exist.
err := symlink.New(jujudPath, filepath.Join(dir, name))
if err != nil && !os.IsExist(err) {
return err
}
}
return nil
}