SSH connection status indicators

- Add Connected bool field to vfs.Entry and RemoteMount
- Track connection status in sshState.connectedHosts
- Show status icon (connected/disconnected) in pane header when browsing remote host
- Async SSH connection test with cancel support for Add Host dialog
- Colored labels and styled help text in SSH dialogs
- Confirmation dialog when deleting manually-added SSH hosts

vendor/github.com/pkg/sftp/match.go

@@ -0,0 +1,137 @@
+package sftp
+
+import (
+	"path"
+	"strings"
+)
+
+// ErrBadPattern indicates a globbing pattern was malformed.
+var ErrBadPattern = path.ErrBadPattern
+
+// Match reports whether name matches the shell pattern.
+//
+// This is an alias for path.Match from the standard library,
+// offered so that callers need not import the path package.
+// For details, see https://golang.org/pkg/path/#Match.
+func Match(pattern, name string) (matched bool, err error) {
+	return path.Match(pattern, name)
+}
+
+// detect if byte(char) is path separator
+func isPathSeparator(c byte) bool {
+	return c == '/'
+}
+
+// Split splits the path p immediately following the final slash,
+// separating it into a directory and file name component.
+//
+// This is an alias for path.Split from the standard library,
+// offered so that callers need not import the path package.
+// For details, see https://golang.org/pkg/path/#Split.
+func Split(p string) (dir, file string) {
+	return path.Split(p)
+}
+
+// Glob returns the names of all files matching pattern or nil
+// if there is no matching file. The syntax of patterns is the same
+// as in Match. The pattern may describe hierarchical names such as
+// /usr/*/bin/ed.
+//
+// Glob ignores file system errors such as I/O errors reading directories.
+// The only possible returned error is ErrBadPattern, when pattern
+// is malformed.
+func (c *Client) Glob(pattern string) (matches []string, err error) {
+	if !hasMeta(pattern) {
+		file, err := c.Lstat(pattern)
+		if err != nil {
+			return nil, nil
+		}
+		dir, _ := Split(pattern)
+		dir = cleanGlobPath(dir)
+		return []string{Join(dir, file.Name())}, nil
+	}
+
+	dir, file := Split(pattern)
+	dir = cleanGlobPath(dir)
+
+	if !hasMeta(dir) {
+		return c.glob(dir, file, nil)
+	}
+
+	// Prevent infinite recursion. See issue 15879.
+	if dir == pattern {
+		return nil, ErrBadPattern
+	}
+
+	var m []string
+	m, err = c.Glob(dir)
+	if err != nil {
+		return
+	}
+	for _, d := range m {
+		matches, err = c.glob(d, file, matches)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// cleanGlobPath prepares path for glob matching.
+func cleanGlobPath(path string) string {
+	switch path {
+	case "":
+		return "."
+	case "/":
+		return path
+	default:
+		return path[0 : len(path)-1] // chop off trailing separator
+	}
+}
+
+// glob searches for files matching pattern in the directory dir
+// and appends them to matches. If the directory cannot be
+// opened, it returns the existing matches. New matches are
+// added in lexicographical order.
+func (c *Client) glob(dir, pattern string, matches []string) (m []string, e error) {
+	m = matches
+	fi, err := c.Stat(dir)
+	if err != nil {
+		return
+	}
+	if !fi.IsDir() {
+		return
+	}
+	names, err := c.ReadDir(dir)
+	if err != nil {
+		return
+	}
+	//sort.Strings(names)
+
+	for _, n := range names {
+		matched, err := Match(pattern, n.Name())
+		if err != nil {
+			return m, err
+		}
+		if matched {
+			m = append(m, Join(dir, n.Name()))
+		}
+	}
+	return
+}
+
+// Join joins any number of path elements into a single path, separating
+// them with slashes.
+//
+// This is an alias for path.Join from the standard library,
+// offered so that callers need not import the path package.
+// For details, see https://golang.org/pkg/path/#Join.
+func Join(elem ...string) string {
+	return path.Join(elem...)
+}
+
+// hasMeta reports whether path contains any of the magic characters
+// recognized by Match.
+func hasMeta(path string) bool {
+	return strings.ContainsAny(path, "\\*?[")
+}