environment.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
#include "crucible/core/environment.hpp" #include "crucible/core/console.hpp" #include "crucible/core/iterators.hpp" #include "crucible/core/memory.hpp" #include "crucible/core/string.hpp" #ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE #include <unistd.h> #endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE #include <cstdio> #include <cstdlib> #include <mutex> namespace crucible::core { namespace { [[nodiscard]] auto stdout_supports_color() -> bool { #ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE return ::isatty(::fileno(stdout)); #endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE #ifdef CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE return false; #endif // CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE } } struct Environment_Data { std::mutex mtx; }; Environment::Environment(std::unique_ptr<Environment_Data> data) : m_data { std::move(data) } {} auto Environment::initialize() -> void { auto locker = lock(); initialize_colors(); } auto Environment::initialize_colors() -> void { // See: https://no-color.org char const *no_color { std::getenv("NO_COLOR") }; if (no_color != nullptr && no_color[0] != '\0') { m_colors = false; return; } // See: https://bixense.com/clicolors/ char const *clicolor_force { std::getenv("CLICOLOR_FORCE") }; if (clicolor_force != nullptr && clicolor_force[0] != '\0') { m_colors = true; return; } // Our own colorization mechanism char const *crucible_colors_data { std::getenv("CRUCIBLE_COLORS") }; if (crucible_colors_data != nullptr && crucible_colors_data[0] != '\0') { std::size_t const crucible_colors_size { std::strlen(crucible_colors_data) }; String_View const crucible_colors { crucible_colors_data, crucible_colors_size }; String_View const off_values[] { "0", "never", "NEVER", "false", "FALSE", "no", "NO", "off", "OFF" }; if (iterate(off_values).contains(crucible_colors)) { m_colors = false; return; } String_View const on_values[] { "1", "always", "ALWAYS", "true", "TRUE", "yes", "YES", "on", "ON" }; if (iterate(on_values).contains(crucible_colors)) { m_colors = true; return; } String_View const auto_values[] { "auto", "AUTO", "automatic", "AUTOMATIC", "detect", "DETECT" }; if (iterate(auto_values).contains(crucible_colors)) { m_colors = stdout_supports_color(); return; } console() .format_err_line("Unrecognized CRUCIBLE_COLORS value `{}`", crucible_colors) .format_err_line("") .format_err_line("To disable colors, do ONE of the following:") .format_err_line(" * Set the NO_COLOR environment variable to any nonempty value") .format_err_line(" * Set the CRUCIBLE_COLORS environment variable to 0, no, off, false, or never") .format_err_line("") .format_err_line("To enable colors, do ONE of the following:") .format_err_line(" * Set the CLICOLOR_FORCE environment variable to any nonempty value") .format_err_line(" * Set the CRUCIBLE_COLORS environment variable to 1, yes, on, true, or always") .format_err_line("") .format_err_line("To autodetect whether or not to use colors:") .format_err_line(" * Set the CRUCIBLE_COLORS environment variable to auto, automatic, or detect") .format_err_line("") .format_err_line("Colors are DISABLED due to this error") .format_err_line(""); m_colors = false; return; } // If there's no color configuration, default to auto m_colors = stdout_supports_color(); } auto Environment::lock() -> std::unique_lock<std::mutex> { return std::unique_lock<std::mutex> { m_data->mtx }; } auto environment() -> Environment & { static Environment instance { std::make_unique<Environment_Data>() }; return instance; } }