reggae.dub.json source code

1 module reggae.dub.json;
2 
3 import reggae.dub.info;
4 import reggae.build;
5 import std.json;
6 import std.algorithm: map, filter;
7 
8 
9 DubInfo getDubInfo(string jsonString) @trusted {
10     auto json = parseJSON(jsonString);
11     auto packages = json.byKey("packages").array;
12     return DubInfo(packages.map!(a => DubPackage(a.byKey("name").str,
13                                                  a.byKey("path").str,
14                                                  a.getOptional("mainSourceFile"),
15                                                  a.getOptional("targetFileName"),
16                                                  a.byKey("dflags").jsonValueToStrings,
17                                                  a.byKey("importPaths").jsonValueToStrings,
18                                                  a.byKey("stringImportPaths").jsonValueToStrings,
19                                                  a.byKey("files").jsonValueToFiles,
20                                                  a.getOptional("targetType"),
21                                                  a.getOptionalList("versions"),
22                                                  a.getOptionalList("dependencies"),
23                                                  a.getOptionalList("libs"))).array);
24 }
25 
26 
27 private string[] jsonValueToFiles(JSONValue files) @trusted {
28     return files.array.
29         filter!(a => a.byKey("type").str == "source").
30         filter!(a => a.byOptionalKey("active", true)). //true for backward compatibility
31         map!(a => a.byKey("path").str).
32         array;
33 }
34 
35 private string[] jsonValueToStrings(JSONValue json) @trusted {
36     return json.array.map!(a => a.str).array;
37 }
38 
39 
40 private auto byKey(JSONValue json, in string key) @trusted {
41     return json.object[key];
42 }
43 
44 private auto byOptionalKey(JSONValue json, in string key, bool def) {
45     import std.conv: to;
46     auto value = json.object;
47     return key in value ? value[key].boolean : def;
48 }
49 
50 //std.json has no conversion to bool
51 private bool boolean(JSONValue json) @trusted {
52     import std.exception: enforce;
53     enforce!JSONException(json.type == JSON_TYPE.TRUE || json.type == JSON_TYPE.FALSE,
54                           "JSONValue is not a boolean");
55     return json.type == JSON_TYPE.TRUE;
56 }
57 
58 private string getOptional(JSONValue json, in string key) @trusted {
59     auto aa = json.object;
60     return key in aa ? aa[key].str : "";
61 }
62 
63 private string[] getOptionalList(JSONValue json, in string key) @trusted {
64     auto aa = json.object;
65     return key in aa ? aa[key].jsonValueToStrings : [];
66 }