ocean.sys.CmdPath source code

1 /******************************************************************************
2 
3     Keeps the path of a running executable
4 
5     Copyright:
6         Copyright (c) 2009-2016 dunnhumby Germany GmbH.
7         All rights reserved.
8 
9     License:
10         Boost Software License Version 1.0. See LICENSE_BOOST.txt for details.
11         Alternatively, this file may be distributed under the terms of the Tango
12         3-Clause BSD License (see LICENSE_BSD.txt for details).
13 
14  ******************************************************************************/
15 
16 module ocean.sys.CmdPath;
17 
18 
19 import ocean.meta.types.Qualifiers;
20 
21 import ocean.sys.Environment;
22 
23 import ocean.io.FilePath;
24 
25 import PathUtil = ocean.io.Path: normalize;
26 
27 ///
28 unittest
29 {
30     void main ( istring[] args )
31     {
32         CmdPath cmdpath;
33 
34         // set to path of running executable
35         cmdpath.set(args[0]);
36 
37         // get absolute directory path of running executable
38         auto exepath = cmdpath.get();
39 
40         // get absolute path of file "config.ini" located in subdirectory
41         // "etc" of the running executable's directory
42         auto cfgpath = cmdpath.prepend(["etc", "config.ini"]);
43     }
44 }
45 
46 /******************************************************************************
47 
48     MainExe structure
49 
50  ******************************************************************************/
51 
52 struct CmdPath
53 {
54     /**************************************************************************
55 
56          Directory of the executable
57 
58      **************************************************************************/
59 
60     private istring dir;
61 
62     /**************************************************************************
63 
64          Sets the executable path.
65 
66          Params:
67               exepath = executable path
68 
69          Returns:
70               base directory
71 
72      **************************************************************************/
73 
74     public istring set ( cstring exepath )
75     {
76         scope path = new FilePath(exepath);
77 
78         path.set(PathUtil.normalize(path.folder));
79 
80         this.dir = path.absolute(Environment.cwd()).toString();
81 
82         return this.get();
83 }
84 
85     /**************************************************************************
86 
87         Returns the base directory.
88 
89         Returns:
90              base directory
91 
92      **************************************************************************/
93 
94     public istring get ( )
95     {
96         return this.dir;
97     }
98 
99     /**************************************************************************
100 
101         Prepends the absolute base directory to "path" and joins the path.
102 
103         Params:
104              path = input path
105 
106         Returns:
107              joined path with prepended absolute base directory
108 
109      **************************************************************************/
110 
111     public istring prepend ( istring[] path ... )
112     {
113         return FilePath.join(this.dir ~ path);
114     }
115 }