From 3226eb40869e46933984bfa41bb7406bced293ac Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Sat, 19 Oct 2019 12:28:45 +0200
Subject: [PATCH] Accept KMYACC env var in rebuildParsers.php

---
 grammar/rebuildParsers.php | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/grammar/rebuildParsers.php b/grammar/rebuildParsers.php
index 9438fd2..ce155e2 100644
--- a/grammar/rebuildParsers.php
+++ b/grammar/rebuildParsers.php
@@ -13,13 +13,16 @@ $tmpResultFile  = __DIR__ . '/tmp_parser.php';
 $resultDir = __DIR__ . '/../lib/PhpParser/Parser';
 $tokensResultsFile = $resultDir . '/Tokens.php';
 
-// check for kmyacc binary in this directory, otherwise fall back to global name
-if (file_exists(__DIR__ . '/kmyacc.exe')) {
-    $kmyacc = __DIR__ . '/kmyacc.exe';
-} else if (file_exists(__DIR__ . '/kmyacc')) {
-    $kmyacc = __DIR__ . '/kmyacc';
-} else {
-    $kmyacc = 'kmyacc';
+$kmyacc = getenv('KMYACC');
+if (!$kmyacc) {
+    // Check for kmyacc binary in this directory, otherwise fall back to global name
+    if (file_exists(__DIR__ . '/kmyacc.exe')) {
+        $kmyacc = __DIR__ . '/kmyacc.exe';
+    } else if (file_exists(__DIR__ . '/kmyacc')) {
+        $kmyacc = __DIR__ . '/kmyacc';
+    } else {
+        $kmyacc = 'kmyacc';
+    }
 }
 
 $options = array_flip($argv);
@@ -62,8 +65,7 @@ foreach ($grammarFileToName as $grammarFile => $name) {
     $additionalArgs = $optionDebug ? '-t -v' : '';
 
     echo "Building $name parser.\n";
-    $output = trim(shell_exec("$kmyacc $additionalArgs -m $skeletonFile -p $name $tmpGrammarFile 2>&1"));
-    echo "Output: \"$output\"\n";
+    $output = execCmd("$kmyacc $additionalArgs -m $skeletonFile -p $name $tmpGrammarFile");
 
     $resultCode = file_get_contents($tmpResultFile);
     $resultCode = removeTrailingWhitespace($resultCode);
@@ -73,8 +75,7 @@ foreach ($grammarFileToName as $grammarFile => $name) {
     unlink($tmpResultFile);
 
     echo "Building token definition.\n";
-    $output = trim(shell_exec("$kmyacc -l -m $tokensTemplate $tmpGrammarFile 2>&1"));
-    assert($output === '');
+    $output = execCmd("$kmyacc -m $tokensTemplate $tmpGrammarFile");
     rename($tmpResultFile, $tokensResultsFile);
 
     if (!$optionKeepTmpGrammar) {
@@ -234,6 +235,15 @@ function ensureDirExists($dir) {
     }
 }
 
+function execCmd($cmd) {
+    $output = trim(shell_exec("$cmd 2>&1"));
+    if ($output !== "") {
+        echo "> " . $cmd . "\n";
+        echo $output;
+    }
+    return $output;
+}
+
 //////////////////////////////
 /// Regex helper functions ///
 //////////////////////////////