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util/human/io.lua

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util/human/io.lua @ 13270:14bbfb2cc8dd default tip

lint: Teach luacheck about module:once Silence warning for using this introduced in 9c62ffbdf2ae
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 16:43:14 +0200
parent 13210:8dbe693ded6b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12975
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1 local array = require "prosody.util.array";
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2 local pposix = require "prosody.util.pposix";
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3 local utf8 = rawget(_G, "utf8") or require"prosody.util.encodings".utf8;
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4 local len = utf8.len or function(s)
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5 local _, count = s:gsub("[%z\001-\127\194-\253][\128-\191]*", "");
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6 return count;
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7 end;
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8
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9 local function getchar(n)
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10 local stty_ret = os.execute("stty raw -echo 2>/dev/null");
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11 local ok, char;
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12 if stty_ret then
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13 ok, char = pcall(io.read, n or 1);
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14 os.execute("stty sane");
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15 else
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16 ok, char = pcall(io.read, "*l");
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17 if ok then
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18 char = char:sub(1, n or 1);
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19 end
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20 end
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21 if ok then
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22 return char;
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23 end
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24 end
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25
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26 local function getline()
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27 local ok, line = pcall(io.read, "*l");
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28 if ok then
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29 return line;
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30 end
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31 end
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32
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33 local function getpass()
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34 local stty_ret = os.execute("stty -echo 2>/dev/null");
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35 if not stty_ret then
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36 io.write("\027[08m"); -- ANSI 'hidden' text attribute
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37 end
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38 local ok, pass = pcall(io.read, "*l");
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39 if stty_ret then
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40 os.execute("stty sane");
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41 else
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42 io.write("\027[00m");
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43 end
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44 io.write("\n");
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45 if ok then
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46 return pass;
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47 end
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48 end
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49
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50 local function show_yesno(prompt)
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51 io.write(prompt, " ");
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52 local choice = getchar():lower();
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53 io.write("\n");
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54 if not choice:match("%a") then
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55 choice = prompt:match("%[.-(%U).-%]$");
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56 if not choice then return nil; end
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57 end
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58 return (choice == "y");
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59 end
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60
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61 local function read_password()
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62 local password;
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63 while true do
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64 io.write("Enter new password: ");
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65 password = getpass();
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66 if not password then
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67 print("No password - cancelled");
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68 return;
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69 end
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70 io.write("Retype new password: ");
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71 if getpass() ~= password then
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72 if not show_yesno [=[Passwords did not match, try again? [Y/n]]=] then
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73 return;
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74 end
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75 else
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76 break;
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77 end
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78 end
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79 return password;
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80 end
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81
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82 local function show_prompt(prompt)
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83 io.write(prompt, " ");
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84 local line = getline();
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85 line = line and line:gsub("\n$","");
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86 return (line and #line > 0) and line or nil;
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87 end
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88
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89 local function printf(fmt, ...)
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90 print(fmt:format(...));
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91 end
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92
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93 local function padright(s, width)
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94 return s..string.rep(" ", width-len(s));
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95 end
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96
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97 local function padleft(s, width)
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98 return string.rep(" ", width-len(s))..s;
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99 end
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100
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101 local pat = "[%z\001-\127\194-\253][\128-\191]*";
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102 local function utf8_cut(s, pos)
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103 return s:match("^"..pat:rep(pos)) or s;
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104 end
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105
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106 if utf8.len and utf8.offset then
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107 function utf8_cut(s, pos)
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108 return s:sub(1, utf8.offset(s, pos+1)-1);
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109 end
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110 end
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111
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112 local function term_width(default)
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113 local env_cols = tonumber(os.getenv "COLUMNS");
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114 if env_cols then return env_cols; end
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115 if not pposix.isatty(io.stdout) then
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116 return default;
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117 end
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118 local stty = io.popen("stty -a");
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119 if not stty then return default; end
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120 local result = stty:read("*a");
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121 if result then
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122 result = result:match("%f[%w]columns[ =]*(%d+)");
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123 end
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124 stty:close();
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125 return tonumber(result or default);
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126 end
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127
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128 local function ellipsis(s, width)
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129 if len(s) <= width then return s; end
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130 if width <= 1 then return "…"; end
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131 return utf8_cut(s, width - 1) .. "…";
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132 end
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133
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134 local function new_table(col_specs, max_width)
13049
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135 max_width = max_width or term_width(80);
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136 local separator = " | ";
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137
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
138 local widths = {};
10907
6af28c756752 util.human.io: Draw a separator between columns
Kim Alvefur <zash@zash.se>
parents: 10904
diff changeset
139 local total_width = max_width - #separator * (#col_specs-1);
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
140 local free_width = total_width;
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
141 -- Calculate width of fixed-size columns
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
142 for i = 1, #col_specs do
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
143 local width = col_specs[i].width or "0";
13030
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
144 if not (type(width) == "string" and width:match("[p%%]$")) then
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
145 local title = col_specs[i].title;
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
146 width = math.max(tonumber(width), title and (#title+1) or 0);
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
147 widths[i] = width;
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
148 free_width = free_width - width;
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
149 end
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
150 end
13030
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
151
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
152 -- Calculate width of proportional columns
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
153 local total_proportional_width = 0;
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
154 for i = 1, #col_specs do
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
155 if not widths[i] then
13031
1023c3faffac util.human.io: Fix pattern to support fractional proportions
Matthew Wild <mwild1@gmail.com>
parents: 13030
diff changeset
156 local width_spec = col_specs[i].width:match("([%d%.]+)[p%%]");
13030
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
157 total_proportional_width = total_proportional_width + tonumber(width_spec);
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
158 end
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
159 end
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
160
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
161 for i = 1, #col_specs do
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
162 if not widths[i] then
13031
1023c3faffac util.human.io: Fix pattern to support fractional proportions
Matthew Wild <mwild1@gmail.com>
parents: 13030
diff changeset
163 local width_spec = col_specs[i].width:match("([%d%.]+)[p%%]");
13030
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
164 local rel_width = tonumber(width_spec);
1f89a2a9f532 util.human.io: Support for dynamic "proportional" columns
Matthew Wild <mwild1@gmail.com>
parents: 12975
diff changeset
165 widths[i] = math.floor(free_width*(rel_width/total_proportional_width));
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
166 end
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
167 end
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
168
10893
a256044c1d12 util.human.io: table: switch row function to simply returning prepared row string
Matthew Wild <mwild1@gmail.com>
parents: 10891
diff changeset
169 return function (row)
10896
c7a0eab27165 util.human.io: table: Fix title printing when columns use named keys
Matthew Wild <mwild1@gmail.com>
parents: 10894
diff changeset
170 local titles;
10894
d15a4284fdf8 util.human.io: table: Return title row when no row data passed
Matthew Wild <mwild1@gmail.com>
parents: 10893
diff changeset
171 if not row then
10896
c7a0eab27165 util.human.io: table: Fix title printing when columns use named keys
Matthew Wild <mwild1@gmail.com>
parents: 10894
diff changeset
172 titles, row = true, array.pluck(col_specs, "title", "");
10894
d15a4284fdf8 util.human.io: table: Return title row when no row data passed
Matthew Wild <mwild1@gmail.com>
parents: 10893
diff changeset
173 end
10893
a256044c1d12 util.human.io: table: switch row function to simply returning prepared row string
Matthew Wild <mwild1@gmail.com>
parents: 10891
diff changeset
174 local output = {};
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
175 for i, column in ipairs(col_specs) do
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
176 local width = widths[i];
11892
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
177 local v = row[not titles and column.key or i];
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
178 if not titles and column.mapper then
13040
0cbe400ebab4 util.human.io: Pass the whole column definition to mapper function
Kim Alvefur <zash@zash.se>
parents: 13039
diff changeset
179 v = column.mapper(v, row, width, column);
11892
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
180 end
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
181 if v == nil then
11893
afef1e170de7 util.human.io: Support specifying column defaults in tables
Kim Alvefur <zash@zash.se>
parents: 11892
diff changeset
182 v = column.default or "";
11892
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
183 else
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
184 v = tostring(v);
e712133b4de1 util.human.io: Pass nil to cell mapper to signal missing value
Kim Alvefur <zash@zash.se>
parents: 10917
diff changeset
185 end
11896
93e9f7ae2f9b util.human.io: Fix cutting of UTF-8 into pieces
Kim Alvefur <zash@zash.se>
parents: 11895
diff changeset
186 if len(v) < width then
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
187 if column.align == "right" then
10917
1eb83bc6f706 util.human.io: Fix right-alignment
Kim Alvefur <zash@zash.se>
parents: 10911
diff changeset
188 v = padleft(v, width);
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
189 else
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
190 v = padright(v, width);
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
191 end
11896
93e9f7ae2f9b util.human.io: Fix cutting of UTF-8 into pieces
Kim Alvefur <zash@zash.se>
parents: 11895
diff changeset
192 elseif len(v) > width then
13039
9ddb344b9fab util.human.io: Allow defining per column ellipsis function
Kim Alvefur <zash@zash.se>
parents: 13038
diff changeset
193 v = (column.ellipsis or ellipsis)(v, width);
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
194 end
10893
a256044c1d12 util.human.io: table: switch row function to simply returning prepared row string
Matthew Wild <mwild1@gmail.com>
parents: 10891
diff changeset
195 table.insert(output, v);
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
196 end
10907
6af28c756752 util.human.io: Draw a separator between columns
Kim Alvefur <zash@zash.se>
parents: 10904
diff changeset
197 return table.concat(output, separator);
13048
946442df65d3 util.human.io: table: Return determined width as a second result
Matthew Wild <mwild1@gmail.com>
parents: 13047
diff changeset
198 end, max_width;
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
199 end
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
200
13054
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
201 local day = 86400;
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
202 local multipliers = {
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
203 d = day, w = day * 7, m = 31 * day, mo = 31 * day, y = 365.2425 * day;
13199
278920294dfe util.human.io: Fix pattern in parse_duration() to cover all used letters
Kim Alvefur <zash@zash.se>
parents: 13068
diff changeset
204 s = 1, mi = 60, h = 3600, ho = 3600
13054
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
205 };
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
206 local function parse_duration(duration_string)
13199
278920294dfe util.human.io: Fix pattern in parse_duration() to cover all used letters
Kim Alvefur <zash@zash.se>
parents: 13068
diff changeset
207 local n, m = duration_string:lower():match("(%d+)%s*([smhdwy]?[io]?)");
13054
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
208 if not n then return nil; end
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
209 return tonumber(n) * ( multipliers[m] or 1 );
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
210 end
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
211
10870
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
212 return {
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
213 getchar = getchar;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
214 getline = getline;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
215 getpass = getpass;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
216 show_yesno = show_yesno;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
217 read_password = read_password;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
218 show_prompt = show_prompt;
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
219 printf = printf;
10891
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
220 padleft = padleft;
8d47858805c9 util.human.io: Add padleft, padright and a table printing function
Matthew Wild <mwild1@gmail.com>
parents: 10872
diff changeset
221 padright = padright;
13044
5bd272095388 util.human.io: Add term_width() method to discover the terminal width
Matthew Wild <mwild1@gmail.com>
parents: 13040
diff changeset
222 term_width = term_width;
11894
57106c61d104 util.human.io: Factor out ellipsis function
Kim Alvefur <zash@zash.se>
parents: 11893
diff changeset
223 ellipsis = ellipsis;
10893
a256044c1d12 util.human.io: table: switch row function to simply returning prepared row string
Matthew Wild <mwild1@gmail.com>
parents: 10891
diff changeset
224 table = new_table;
13054
f4d7fe919969 util.human.io: Add parse_duration() method to parse a duration string
Matthew Wild <mwild1@gmail.com>
parents: 13051
diff changeset
225 parse_duration = parse_duration;
10870
3f1889608f3e util.human.io: New central place for UI helpers
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
226 };