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local function getchar(n)
local stty_ret = os.execute("stty raw -echo 2>/dev/null");
local ok, char;
if stty_ret == true or stty_ret == 0 then
ok, char = pcall(io.read, n or 1);
os.execute("stty sane");
else
ok, char = pcall(io.read, "*l");
if ok then
char = char:sub(1, n or 1);
end
end
if ok then
return char;
end
end
local function getline()
local ok, line = pcall(io.read, "*l");
if ok then
return line;
end
end
local function getpass()
local stty_ret, _, status_code = os.execute("stty -echo 2>/dev/null");
if status_code then -- COMPAT w/ Lua 5.1
stty_ret = status_code;
end
if stty_ret ~= 0 then
io.write("\027[08m"); -- ANSI 'hidden' text attribute
end
local ok, pass = pcall(io.read, "*l");
if stty_ret == 0 then
os.execute("stty sane");
else
io.write("\027[00m");
end
io.write("\n");
if ok then
return pass;
end
end
local function show_yesno(prompt)
io.write(prompt, " ");
local choice = getchar():lower();
io.write("\n");
if not choice:match("%a") then
choice = prompt:match("%[.-(%U).-%]$");
if not choice then return nil; end
end
return (choice == "y");
end
local function read_password()
local password;
while true do
io.write("Enter new password: ");
password = getpass();
if not password then
print("No password - cancelled");
return;
end
io.write("Retype new password: ");
if getpass() ~= password then
if not show_yesno [=[Passwords did not match, try again? [Y/n]]=] then
return;
end
else
break;
end
end
return password;
end
local function show_prompt(prompt)
io.write(prompt, " ");
local line = getline();
line = line and line:gsub("\n$","");
return (line and #line > 0) and line or nil;
end
local function printf(fmt, ...)
print(fmt:format(...));
end
local function padright(s, width)
return s..string.rep(" ", width-#s);
end
local function padleft(s, width)
return string.rep(" ", width-#s)..s;
end
local function table(col_specs, max_width, padding)
max_width = max_width or 80;
padding = padding or 4;
local widths = {};
local total_width = max_width - padding;
local free_width = total_width;
-- Calculate width of fixed-size columns
for i = 1, #col_specs do
local width = col_specs[i].width or "0";
if not(type(width) == "string" and width:sub(-1) == "%") then
local title = col_specs[i].title;
width = math.max(tonumber(width), title and (#title+1) or 0);
widths[i] = width;
free_width = free_width - width;
end
end
-- Calculate width of %-based columns
for i = 1, #col_specs do
if not widths[i] then
local pc_width = tonumber((col_specs[i].width:gsub("%%$", "")));
widths[i] = math.floor(free_width*(pc_width/100));
end
end
return function (row, f)
for i, column in ipairs(col_specs) do
local width = widths[i];
local v = tostring(row[column.key or i] or ""):sub(1, width);
if #v < width then
if column.align == "right" then
v = padleft(v, width-1).." ";
else
v = padright(v, width);
end
end
(f or io.stdout):write(v);
end
(f or io.stdout):write("\n");
end;
end
return {
getchar = getchar;
getline = getline;
getpass = getpass;
show_yesno = show_yesno;
read_password = read_password;
show_prompt = show_prompt;
printf = printf;
padleft = padleft;
padright = padright;
table = table;
};
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