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teleprinter.zig
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teleprinter.zig
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pub const manipulators = @import("teleprinter/manipulators.zig");
pub const TTY = @import("teleprinter/tty.zig").TTY;
pub const Dumb_TTY = @import("teleprinter/dumb.zig").Dumb_TTY;
pub const ANSI_TTY = @import("teleprinter/ansi.zig").ANSI_TTY;
pub const std = @import("std");
const m = manipulators;
pub fn autoTTY(allocator: *std.mem.Allocator, comptime function: var, context: var, file: ?std.fs.File) !*TTY {
const kind = switch (@TypeOf(context)) {
std.fs.File => autoKind(context),
else => autoKind(file),
};
switch (kind) {
.dumb => {
const T = Dumb_TTY(function);
var result = try allocator.create(T);
result.* = T.init(allocator, true, context);
return &result.tty;
},
.ansi8 => {
const T = ANSI_TTY(function);
var result = try allocator.create(T);
errdefer allocator.destroy(result);
result.* = try T.init(allocator, true, context, .ansi8);
return &result.tty;
},
}
}
pub const Kind = enum {
dumb,
ansi8,
};
fn autoKind(file: ?std.fs.File) Kind {
var cached_env_color_invalid = true;
var cached_env_color: ?[]const u8 = null;
if (cached_env_color_invalid) {
cached_env_color = std.os.getenv("MIK_TTY_COLOR");
cached_env_color_invalid = false;
}
if (cached_env_color) |uw| {
if (std.mem.eql(u8, uw, "always")) return Kind.ansi8;
if (std.mem.eql(u8, uw, "never")) return Kind.dumb;
}
if (file) |mfile| {
if (std.fs.File.isTty(mfile)) {
var cached_env_term_invalid = true;
var cached_env_term: ?[]const u8 = null;
if (cached_env_term_invalid) {
cached_env_term = std.os.getenv("TERM");
cached_env_term_invalid = false;
}
if (cached_env_term) |uw| {
if (std.mem.indexOf(u8, uw, "256color")) |_| return Kind.ansi8;
}
}
}
return Kind.dumb;
}