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ReleephBranchTemplate.php
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Mon, Nov 4, 07:15

ReleephBranchTemplate.php
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<?php
final class ReleephBranchTemplate {
const KEY = 'releeph.default-branch-template';
public static function getDefaultTemplate() {
return PhabricatorEnv::getEnvConfig(self::KEY);
}
public static function getRequiredDefaultTemplate() {
$template = self::getDefaultTemplate();
if (!$template) {
throw new Exception(sprintf(
"Config setting '%s' must be set, ".
"or you must provide a branch-template for each project!",
self::KEY));
}
return $template;
}
public static function getFakeCommitHandleFor($arc_project_id) {
$arc_project = id(new PhabricatorRepositoryArcanistProject())
->load($arc_project_id);
if (!$arc_project) {
throw new Exception(
"No Arc project found with id '{$arc_project_id}'!");
}
$repository = $arc_project->loadRepository();
return id(new PhabricatorObjectHandle())
->setName($repository->formatCommitName('100000000000'));
}
private $commitHandle;
private $branchDate = null;
private $projectName;
private $isSymbolic;
public function setCommitHandle(PhabricatorObjectHandle $handle) {
$this->commitHandle = $handle;
return $this;
}
public function setBranchDate($branch_date) {
$this->branchDate = $branch_date;
return $this;
}
public function setReleephProjectName($project_name) {
$this->projectName = $project_name;
return $this;
}
public function setSymbolic($is_symbolic) {
$this->isSymbolic = $is_symbolic;
return $this;
}
public function interpolate($template) {
if (!$this->projectName) {
return array('', array());
}
list($name, $name_errors) = $this->interpolateInner(
$template,
$this->isSymbolic);
if ($this->isSymbolic) {
return array($name, $name_errors);
} else {
$validate_errors = $this->validateAsBranchName($name);
$errors = array_merge($name_errors, $validate_errors);
return array($name, $errors);
}
}
public static function getHelpRemarkup() {
return <<<EOTEXT
==== Interpolations ====
| Code | Meaning
| ----- | -------
| `%P` | The name of your project, with spaces changed to "-".
| `%p` | Like %P, but all lowercase.
| `%Y` | The four digit year associated with the branch date.
| `%m` | The two digit month.
| `%d` | The two digit day.
| `%v` | The handle of the commit where the branch was cut ("rXYZa4b3c2d1").
| `%V` | The abbreviated commit id where the branch was cut ("a4b3c2d1").
| `%..` | Any other sequence interpreted by `strftime()`.
| `%%` | A literal percent sign.
==== Tips for Branch Templates ====
Use a directory to separate your release branches from other branches:
lang=none
releases/%Y-%M-%d-%v
=> releases/2012-30-16-rHERGE32cd512a52b7
Include a second hierarchy if you share your repository with other projects:
lang=none
releases/%P/%p-release-%Y%m%d-%V
=> releases/Tintin/tintin-release-20121116-32cd512a52b7
Keep your branch names simple, avoiding strange punctuation, most of which is
forbidden or escaped anyway:
lang=none, counterexample
releases//..clown-releases..//`date --iso=seconds`-$(sudo halt)
Include the date early in your template, in an order which sorts properly:
lang=none
releases/%Y%m%d-%v
=> releases/20121116-rHERGE32cd512a52b7 (good!)
releases/%V-%m.%d.%Y
=> releases/32cd512a52b7-11.16.2012 (awful!)
EOTEXT
;
}
/*
* xsprintf() would be useful here, but that's for formatting concrete lists
* of things in a certain way...
*
* animal_printf('%A %A %A', $dog1, $dog2, $dog3);
*
* ...rather than interpolating percent-control-strings like strftime does.
*/
private function interpolateInner($template, $is_symbolic) {
$name = $template;
$errors = array();
$safe_project_name = str_replace(' ', '-', $this->projectName);
$short_commit_id = last(
preg_split('/r[A-Z]+/', $this->commitHandle->getName()));
$interpolations = array();
for ($ii = 0; $ii < strlen($name); $ii++) {
$char = substr($name, $ii, 1);
$prev = null;
if ($ii > 0) {
$prev = substr($name, $ii - 1, 1);
}
$next = substr($name, $ii + 1, 1);
if ($next && $char == '%' && $prev != '%') {
$interpolations[$ii] = $next;
}
}
$variable_interpolations = array();
$reverse_interpolations = $interpolations;
krsort($reverse_interpolations);
if ($this->branchDate) {
$branch_date = $this->branchDate;
} else {
$branch_date = $this->commitHandle->getTimestamp();
}
foreach ($reverse_interpolations as $position => $code) {
$replacement = null;
switch ($code) {
case 'v':
$replacement = $this->commitHandle->getName();
$is_variable = true;
break;
case 'V':
$replacement = $short_commit_id;
$is_variable = true;
break;
case 'P':
$replacement = $safe_project_name;
$is_variable = false;
break;
case 'p':
$replacement = strtolower($safe_project_name);
$is_variable = false;
break;
default:
// Format anything else using strftime()
$replacement = strftime("%{$code}", $branch_date);
$is_variable = true;
break;
}
if ($is_variable) {
$variable_interpolations[] = $code;
}
$name = substr_replace($name, $replacement, $position, 2);
}
if (!$is_symbolic && !$variable_interpolations) {
$errors[] = "Include additional interpolations that aren't static!";
}
return array($name, $errors);
}
private function validateAsBranchName($name) {
$errors = array();
if (preg_match('{^/}', $name) || preg_match('{/$}', $name)) {
$errors[] = "Branches cannot begin or end with '/'";
}
if (preg_match('{//+}', $name)) {
$errors[] = "Branches cannot contain multiple consective '/'";
}
$parts = array_filter(explode('/', $name));
foreach ($parts as $index => $part) {
$part_error = null;
if (preg_match('{^\.}', $part) || preg_match('{\.$}', $part)) {
$errors[] = "Path components cannot begin or end with '.'";
} elseif (preg_match('{^(?!\w)}', $part)) {
$errors[] = "Path components must begin with an alphanumeric";
} elseif (!preg_match('{^\w ([\w-_%\.]* [\w-_%])?$}x', $part)) {
$errors[] =
"Path components may only contain alphanumerics ".
"or '-', '_', or '.'";
}
}
return $errors;
}
}

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