forked from Alexays/Waybar
-
Notifications
You must be signed in to change notification settings - Fork 0
/
config.cpp
183 lines (163 loc) · 5.64 KB
/
config.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
#include "config.hpp"
#include <spdlog/spdlog.h>
#include <unistd.h>
#include <wordexp.h>
#include <filesystem>
#include <fstream>
#include <stdexcept>
#include "util/json.hpp"
namespace fs = std::filesystem;
namespace waybar {
const std::vector<std::string> Config::CONFIG_DIRS = {
"$XDG_CONFIG_HOME/waybar/", "$HOME/.config/waybar/", "$HOME/waybar/",
"/etc/xdg/waybar/", SYSCONFDIR "/xdg/waybar/", "./resources/",
};
const char *Config::CONFIG_PATH_ENV = "WAYBAR_CONFIG_DIR";
std::optional<std::string> tryExpandPath(const std::string base, const std::string filename) {
fs::path path;
if (filename != "") {
path = fs::path(base) / fs::path(filename);
} else {
path = fs::path(base);
}
spdlog::debug("Try expanding: {}", path.string());
wordexp_t p;
if (wordexp(path.c_str(), &p, 0) == 0) {
if (access(*p.we_wordv, F_OK) == 0) {
std::string result = *p.we_wordv;
wordfree(&p);
spdlog::debug("Found config file: {}", path.string());
return result;
}
wordfree(&p);
}
return std::nullopt;
}
std::optional<std::string> Config::findConfigPath(const std::vector<std::string> &names,
const std::vector<std::string> &dirs) {
if (const char *dir = std::getenv(Config::CONFIG_PATH_ENV)) {
for (const auto &name : names) {
if (auto res = tryExpandPath(dir, name); res) {
return res;
}
}
}
for (const auto &dir : dirs) {
for (const auto &name : names) {
if (auto res = tryExpandPath(dir, name); res) {
return res;
}
}
}
return std::nullopt;
}
void Config::setupConfig(Json::Value &dst, const std::string &config_file, int depth) {
if (depth > 100) {
throw std::runtime_error("Aborting due to likely recursive include in config files");
}
std::ifstream file(config_file);
if (!file.is_open()) {
throw std::runtime_error("Can't open config file");
}
std::string str((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
util::JsonParser parser;
Json::Value tmp_config = parser.parse(str);
if (tmp_config.isArray()) {
for (auto &config_part : tmp_config) {
resolveConfigIncludes(config_part, depth);
}
} else {
resolveConfigIncludes(tmp_config, depth);
}
mergeConfig(dst, tmp_config);
}
void Config::resolveConfigIncludes(Json::Value &config, int depth) {
Json::Value includes = config["include"];
if (includes.isArray()) {
for (const auto &include : includes) {
spdlog::info("Including resource file: {}", include.asString());
setupConfig(config, tryExpandPath(include.asString(), "").value_or(""), ++depth);
}
} else if (includes.isString()) {
spdlog::info("Including resource file: {}", includes.asString());
setupConfig(config, tryExpandPath(includes.asString(), "").value_or(""), ++depth);
}
}
void Config::mergeConfig(Json::Value &a_config_, Json::Value &b_config_) {
if (!a_config_) {
// For the first config
a_config_ = b_config_;
} else if (a_config_.isObject() && b_config_.isObject()) {
for (const auto &key : b_config_.getMemberNames()) {
// [] creates key with default value. Use `get` to avoid that.
if (a_config_.get(key, Json::Value::nullSingleton()).isObject() &&
b_config_[key].isObject()) {
mergeConfig(a_config_[key], b_config_[key]);
} else if (!a_config_.isMember(key)) {
// do not allow overriding value set by top or previously included config
a_config_[key] = b_config_[key];
} else {
spdlog::trace("Option {} is already set; ignoring value {}", key, b_config_[key]);
}
}
} else {
spdlog::error("Cannot merge config, conflicting or invalid JSON types");
}
}
bool isValidOutput(const Json::Value &config, const std::string &name,
const std::string &identifier) {
if (config["output"].isArray()) {
for (auto const &output_conf : config["output"]) {
if (output_conf.isString()) {
auto config_output = output_conf.asString();
if (config_output.substr(0, 1) == "!") {
if (config_output.substr(1) == name || config_output.substr(1) == identifier) {
return false;
} else {
continue;
}
}
if (config_output == name || config_output == identifier) {
return true;
}
if (config_output.substr(0, 1) == "*") {
return true;
}
}
}
return false;
} else if (config["output"].isString()) {
auto config_output = config["output"].asString();
if (!config_output.empty()) {
if (config_output.substr(0, 1) == "!") {
return config_output.substr(1) != name && config_output.substr(1) != identifier;
}
return config_output == name || config_output == identifier;
}
}
return true;
}
void Config::load(const std::string &config) {
auto file = config.empty() ? findConfigPath({"config", "config.jsonc"}) : config;
if (!file) {
throw std::runtime_error("Missing required resource files");
}
config_file_ = file.value();
spdlog::info("Using configuration file {}", config_file_);
setupConfig(config_, config_file_, 0);
}
std::vector<Json::Value> Config::getOutputConfigs(const std::string &name,
const std::string &identifier) {
std::vector<Json::Value> configs;
if (config_.isArray()) {
for (auto const &config : config_) {
if (config.isObject() && isValidOutput(config, name, identifier)) {
configs.push_back(config);
}
}
} else if (isValidOutput(config_, name, identifier)) {
configs.push_back(config_);
}
return configs;
}
} // namespace waybar