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diff --git a/src/filesystem/Filesystem.php b/src/filesystem/Filesystem.php
--- a/src/filesystem/Filesystem.php
+++ b/src/filesystem/Filesystem.php
@@ -1119,7 +1119,7 @@
}
public static function concatenatePaths(array $components) {
- $components = implode($components, DIRECTORY_SEPARATOR);
+ $components = implode(DIRECTORY_SEPARATOR, $components);
// Replace any extra sequences of directory separators with a single
// separator, so we don't end up with "path//to///thing.c".
diff --git a/src/lint/linter/xhpast/rules/ArcanistImplodeArgumentOrderXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplodeArgumentOrderXHPASTLinterRule.php
--- a/src/lint/linter/xhpast/rules/ArcanistImplodeArgumentOrderXHPASTLinterRule.php
+++ b/src/lint/linter/xhpast/rules/ArcanistImplodeArgumentOrderXHPASTLinterRule.php
@@ -23,7 +23,17 @@
}
$parameter = $parameters->getChildByIndex(1);
- if (!$parameter->isStaticScalar()) {
+
+ // If the value is a static scalar, like a string literal, it's probably
+ // the glue.
+ $is_scalar = $parameter->isStaticScalar();
+
+ // If the value is a constant, like "DIRECTORY_SEPARATOR", it's probably
+ // the glue.
+ $is_constant = ($parameter->getTypeName() === 'n_SYMBOL_NAME');
+
+ $looks_like_glue = ($is_scalar || $is_constant);
+ if (!$looks_like_glue) {
continue;
}
diff --git a/src/lint/linter/xhpast/rules/__tests__/implode-argument-order/implode.lint-test b/src/lint/linter/xhpast/rules/__tests__/implode-argument-order/implode.lint-test
--- a/src/lint/linter/xhpast/rules/__tests__/implode-argument-order/implode.lint-test
+++ b/src/lint/linter/xhpast/rules/__tests__/implode-argument-order/implode.lint-test
@@ -14,5 +14,10 @@
implode($x);
implode($x, $y, $z);
+// This should raise a warning by guessing that "DIRECTORY_SEPARATOR" is
+// glue.
+implode($path_list, DIRECTORY_SEPARATOR);
+
~~~~~~~~~~
error:7:1:XHP129:Implode With Glue First
+error:19:1:XHP129:Implode With Glue First
diff --git a/src/workflow/ArcanistCloseWorkflow.php b/src/workflow/ArcanistCloseWorkflow.php
--- a/src/workflow/ArcanistCloseWorkflow.php
+++ b/src/workflow/ArcanistCloseWorkflow.php
@@ -90,7 +90,7 @@
"%s\n",
pht(
"Valid status options are:\n\t%s",
- implode($this->getStatusOptions(), ', ')));
+ implode(', ', $this->getStatusOptions())));
return 0;
}
$ids = $this->getArgument('task_id');

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