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libphutil/src/console/format.php
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format.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @group console
*/
function phutil_console_format($format /* ... */) {
$args = func_get_args();
return call_user_func_array(
array('PhutilConsoleFormatter', 'formatString'),
$args);
}
/**
* @group console
*/
function phutil_console_confirm($prompt, $default_no = true) {
$prompt_options = $default_no ? '[y/N]' : '[Y/n]';
do {
$response = phutil_console_prompt($prompt.' '.$prompt_options);
$c = trim(strtolower($response));
} while ($c != 'y' && $c != 'n' && $c != '');
echo "\n";
if ($default_no) {
return ($c == 'y');
} else {
return ($c != 'n');
}
}
/**
* @group console
*/
function phutil_console_prompt($prompt, $history = '') {
echo "\n\n";
$prompt = phutil_console_wrap($prompt.' ', 4);
try {
phutil_console_require_tty();
} catch (PhutilConsoleStdinNotInteractiveException $ex) {
// Throw after echoing the prompt so the user has some idea what happened.
echo $prompt;
throw $ex;
}
$use_history = true;
if ($history == '') {
$use_history = false;
} else {
// Test if bash is available by seeing if it can run `true`.
list($err) = exec_manual('bash -c %s', 'true');
if ($err) {
$use_history = false;
}
}
if (!$use_history) {
echo $prompt;
$response = fgets(STDIN);
} else {
// There's around 0% chance that readline() is available directly in PHP,
// so we're using bash/read/history instead.
$command = csprintf(
'bash -c %s',
csprintf(
'history -r %s 2>/dev/null; '.
'read -e -p %s; '.
'echo "$REPLY"; '.
'history -s "$REPLY" 2>/dev/null; '.
'history -w %s 2>/dev/null',
$history,
$prompt,
$history));
// execx() doesn't work with input, phutil_passthru() doesn't return output.
$response = shell_exec($command);
}
return rtrim($response, "\r\n");
}
/**
* Soft wrap text for display on a console, respecting UTF8 character boundaries
* and ANSI color escape sequences.
*
* @param string Text to wrap.
* @param int Optional indent level.
* @return string Wrapped text.
*
* @group console
*/
function phutil_console_wrap($text, $indent = 0) {
$lines = array();
$width = (78 - $indent);
$esc = chr(27);
$break_pos = null;
$len_after_break = 0;
$line_len = 0;
$line = array();
$lines = array();
$vector = phutil_utf8v($text);
$vector_len = count($vector);
for ($ii = 0; $ii < $vector_len; $ii++) {
$chr = $vector[$ii];
// If this is an ANSI escape sequence for a color code, just consume it
// without counting it toward the character limit. This prevents lines
// with bold/color on them from wrapping too early.
if ($chr == $esc) {
for ($ii; $ii < $vector_len; $ii++) {
$line[] = $vector[$ii];
if ($vector[$ii] == 'm') {
break;
}
}
continue;
}
$line[] = $chr;
++$line_len;
++$len_after_break;
if ($line_len > $width) {
if ($break_pos !== null) {
$slice = array_slice($line, 0, $break_pos);
while (count($slice) && end($slice) == ' ') {
array_pop($slice);
}
$slice[] = "\n";
$lines[] = $slice;
$line = array_slice($line, $break_pos);
$line_len = $len_after_break;
$len_after_break = 0;
$break_pos = 0;
}
}
if ($chr == " ") {
$break_pos = count($line);
$len_after_break = 0;
}
if ($chr == "\n") {
$lines[] = $line;
$line = array();
$len_after_break = 0;
$line_len = 0;
$break_pos = null;
}
}
if ($line) {
if ($line) {
$lines[] = $line;
}
}
$pre = null;
if ($indent) {
$pre = str_repeat(' ', $indent);
}
foreach ($lines as $idx => $line) {
$lines[$idx] = $pre.implode('', $line);
}
return implode('', $lines);
}
/**
* @group console
*/
function phutil_console_require_tty() {
if (function_exists('posix_isatty') && !posix_isatty(STDIN)) {
throw new PhutilConsoleStdinNotInteractiveException();
}
}
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