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util.human.io: Fix stray 'stty' error by only querying width of real ttys

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This adds a dependency on a binary and *nix-specific module but then
stty is probably *nix-specific anyway so maybe that's fine.
This commit is contained in:
Kim Alvefur 2023-07-16 21:21:37 +02:00
parent 1987a7411f
commit c222b08005
1 changed files with 4 additions and 0 deletions
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4
util/human/io.lua
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@ -1,4 +1,5 @@
local array = require "prosody.util.array";
local pposix = require "prosody.util.pposix";
local utf8 = rawget(_G, "utf8") or require"prosody.util.encodings".utf8;
local len = utf8.len or function(s)
local _, count = s:gsub("[%z\001-\127\194-\253][\128-\191]*", "");
@ -111,6 +112,9 @@ end
local function term_width(default)
local env_cols = tonumber(os.getenv "COLUMNS");
if env_cols then return env_cols; end
if not pposix.isatty(io.stdout) then
return default;
end
local stty = io.popen("stty -a");
if not stty then return default; end
local result = stty:read("*a");