chore: include build dep go-paths-helper.

See #305

pkg/paths/constructors.go

@@ -0,0 +1,80 @@
+/*
+ * This file is part of PathsHelper library.
+ *
+ * Copyright 2018 Arduino AG (http://www.arduino.cc/)
+ *
+ * PathsHelper library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ */
+
+package paths
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+// NullPath return the path to the /dev/null equivalent for the current OS
+func NullPath() *Path {
+	return New("/dev/null")
+}
+
+// TempDir returns the default path to use for temporary files
+func TempDir() *Path {
+	return New(os.TempDir()).Canonical()
+}
+
+// MkTempDir creates a new temporary directory in the directory
+// dir with a name beginning with prefix and returns the path of
+// the new directory. If dir is the empty string, TempDir uses the
+// default directory for temporary files
+func MkTempDir(dir, prefix string) (*Path, error) {
+	path, err := ioutil.TempDir(dir, prefix)
+	if err != nil {
+		return nil, err
+	}
+	return New(path).Canonical(), nil
+}
+
+// MkTempFile creates a new temporary file in the directory dir with a name beginning with prefix,
+// opens the file for reading and writing, and returns the resulting *os.File. If dir is nil,
+// MkTempFile uses the default directory for temporary files (see paths.TempDir). Multiple programs
+// calling TempFile simultaneously will not choose the same file. The caller can use f.Name() to
+// find the pathname of the file. It is the caller's responsibility to remove the file when no longer needed.
+func MkTempFile(dir *Path, prefix string) (*os.File, error) {
+	tmpDir := ""
+	if dir != nil {
+		tmpDir = dir.String()
+	}
+	return ioutil.TempFile(tmpDir, prefix)
+}
+
+// Getwd returns a rooted path name corresponding to the current
+// directory.
+func Getwd() (*Path, error) {
+	wd, err := os.Getwd()
+	if err != nil {
+		return nil, err
+	}
+	return New(wd), nil
+}