|
| 1 | +//! Process environment values captured at program startup. |
| 2 | + |
| 3 | +const std = @import("std"); |
| 4 | +const builtin = @import("builtin"); |
| 5 | +const color_mod = @import("../style/color.zig"); |
| 6 | +const unicode_mod = @import("../unicode.zig"); |
| 7 | + |
| 8 | +pub const Environment = struct { |
| 9 | + term: []const u8 = "", |
| 10 | + term_program: []const u8 = "", |
| 11 | + lc_terminal: []const u8 = "", |
| 12 | + color_term: []const u8 = "", |
| 13 | + color_fg_bg: []const u8 = "", |
| 14 | + term_features: []const u8 = "", |
| 15 | + home_dir: []const u8 = defaultHomeDir(), |
| 16 | + no_color: bool = false, |
| 17 | + has_tmux: bool = false, |
| 18 | + has_zellij: bool = false, |
| 19 | + has_kitty_window: bool = false, |
| 20 | + color_profile: color_mod.ColorProfile = .ansi, |
| 21 | + is_dark_background: bool = true, |
| 22 | + unicode_width_override: ?unicode_mod.WidthStrategy = null, |
| 23 | + |
| 24 | + pub fn fromEnvMap(environ_map: *const std.process.Environ.Map) Environment { |
| 25 | + const term = environ_map.get("TERM") orelse ""; |
| 26 | + const term_program = environ_map.get("TERM_PROGRAM") orelse ""; |
| 27 | + const lc_terminal = environ_map.get("LC_TERMINAL") orelse ""; |
| 28 | + const color_term = environ_map.get("COLORTERM") orelse ""; |
| 29 | + const color_fg_bg = environ_map.get("COLORFGBG") orelse ""; |
| 30 | + const term_features = environ_map.get("TERM_FEATURES") orelse ""; |
| 31 | + const home_dir = homeDirFromEnvMap(environ_map); |
| 32 | + const no_color = environ_map.get("NO_COLOR") != null; |
| 33 | + |
| 34 | + return .{ |
| 35 | + .term = term, |
| 36 | + .term_program = term_program, |
| 37 | + .lc_terminal = lc_terminal, |
| 38 | + .color_term = color_term, |
| 39 | + .color_fg_bg = color_fg_bg, |
| 40 | + .term_features = term_features, |
| 41 | + .home_dir = home_dir, |
| 42 | + .no_color = no_color, |
| 43 | + .has_tmux = envValuePresent(environ_map, "TMUX"), |
| 44 | + .has_zellij = envValuePresent(environ_map, "ZELLIJ"), |
| 45 | + .has_kitty_window = envValuePresent(environ_map, "KITTY_WINDOW_ID"), |
| 46 | + .color_profile = color_mod.ColorProfile.detect(.{ |
| 47 | + .no_color = no_color, |
| 48 | + .color_term = color_term, |
| 49 | + .term = term, |
| 50 | + }), |
| 51 | + .is_dark_background = color_mod.hasDarkBackground(color_fg_bg), |
| 52 | + .unicode_width_override = parseUnicodeWidthOverride(environ_map.get("ZZ_UNICODE_WIDTH") orelse ""), |
| 53 | + }; |
| 54 | + } |
| 55 | + |
| 56 | + pub fn isInsideMultiplexer(self: *const Environment) bool { |
| 57 | + return self.has_tmux or self.has_zellij or self.termContains("screen"); |
| 58 | + } |
| 59 | + |
| 60 | + pub fn isKnownUnicodeWidthTerminal(self: *const Environment) bool { |
| 61 | + return self.termProgramEquals("WezTerm") or |
| 62 | + self.termProgramEquals("iTerm.app") or |
| 63 | + self.termContains("wezterm") or |
| 64 | + self.termContains("ghostty"); |
| 65 | + } |
| 66 | + |
| 67 | + pub fn looksLikeKittyTerminal(self: *const Environment) bool { |
| 68 | + return self.has_kitty_window or self.termContains("kitty"); |
| 69 | + } |
| 70 | + |
| 71 | + pub fn looksLikeIterm2Terminal(self: *const Environment) bool { |
| 72 | + return self.termProgramEquals("iTerm.app") or self.lcTerminalEquals("iTerm2"); |
| 73 | + } |
| 74 | + |
| 75 | + pub fn looksLikeSixelTerminal(self: *const Environment) bool { |
| 76 | + return self.termContains("sixel") or |
| 77 | + self.termContains("mlterm") or |
| 78 | + self.termContains("yaft") or |
| 79 | + self.termContains("contour"); |
| 80 | + } |
| 81 | + |
| 82 | + pub fn termContains(self: *const Environment, needle: []const u8) bool { |
| 83 | + return std.mem.indexOf(u8, self.term, needle) != null; |
| 84 | + } |
| 85 | + |
| 86 | + pub fn termProgramEquals(self: *const Environment, expected: []const u8) bool { |
| 87 | + return std.ascii.eqlIgnoreCase(self.term_program, expected); |
| 88 | + } |
| 89 | + |
| 90 | + pub fn lcTerminalEquals(self: *const Environment, expected: []const u8) bool { |
| 91 | + return std.ascii.eqlIgnoreCase(self.lc_terminal, expected); |
| 92 | + } |
| 93 | + |
| 94 | + fn homeDirFromEnvMap(environ_map: *const std.process.Environ.Map) []const u8 { |
| 95 | + if (comptime builtin.os.tag == .windows) { |
| 96 | + if (environ_map.get("USERPROFILE")) |home| { |
| 97 | + if (home.len > 0) return home; |
| 98 | + } |
| 99 | + } else { |
| 100 | + if (environ_map.get("HOME")) |home| { |
| 101 | + if (home.len > 0) return home; |
| 102 | + } |
| 103 | + } |
| 104 | + return defaultHomeDir(); |
| 105 | + } |
| 106 | + |
| 107 | + fn defaultHomeDir() []const u8 { |
| 108 | + return if (comptime builtin.os.tag == .windows) "C:\\" else "/"; |
| 109 | + } |
| 110 | + |
| 111 | + fn envValuePresent(environ_map: *const std.process.Environ.Map, name: []const u8) bool { |
| 112 | + const value = environ_map.get(name) orelse return false; |
| 113 | + return value.len > 0; |
| 114 | + } |
| 115 | + |
| 116 | + fn parseUnicodeWidthOverride(raw: []const u8) ?unicode_mod.WidthStrategy { |
| 117 | + if (std.ascii.eqlIgnoreCase(raw, "unicode")) return .unicode; |
| 118 | + if (std.ascii.eqlIgnoreCase(raw, "legacy")) return .legacy_wcwidth; |
| 119 | + if (std.ascii.eqlIgnoreCase(raw, "auto")) return null; |
| 120 | + return null; |
| 121 | + } |
| 122 | +}; |
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