From 4c4d11304aef8857dcce8524e7fd9223e00191b5 Mon Sep 17 00:00:00 2001
From: Sara Golemon <sgolemon@fb.com>
Date: Thu, 25 Apr 2013 19:14:35 -0700
Subject: [PATCH] Add a rule for generating the parser from util/parser/hphp.y

---
 hphp/tools/generated_files.sh | 44 +++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/hphp/tools/generated_files.sh b/hphp/tools/generated_files.sh
index e1cecabea..26badbb5a 100755
--- a/hphp/tools/generated_files.sh
+++ b/hphp/tools/generated_files.sh
@@ -29,6 +29,7 @@ if [ "$1" = "help" ]; then
   echo "$0 constants  - Build hphp/system/constants.h"
   echo "$0 class_map  - Build hphp/system/class_map.cpp"
   echo "$0 lexer      - Regenerate the lexer"
+  echo "$0 parser     - Regenerate the parser"
   echo "$0 license    - Add license headers to all files"
   echo ""
   echo "$0 all  - All of the above in listed order"
@@ -67,6 +68,49 @@ if [ "$1" = "lexer" -o "$1" = "all" ]; then
   fi
 fi
 
+if [ "$1" = "parser" -o "$1" = "all" ]; then
+  cd $HPHP_HOME/hphp/util/parser
+  BISON=`which bison`
+  SED=`which sed`
+  if [ -x "$BISON" -a -x "$SED" ]; then
+    [ $VERBOSE -eq 1 ] && echo "Generating parser"
+    $BISON -pCompiler --verbose --locations -d -onew_hphp.tab.cpp hphp.y
+    rm -f new_hphp.output
+    cat new_hphp.tab.hpp | \
+      $SED -E "s/(T_\w+) = ([0-9]+)/YYTOKEN(\\2, \\1)/" | \
+      $SED -E "{
+                N
+                s/\{([ \r\n\t]+YYTOKEN\(([0-9]+),)/{\n#ifndef YYTOKEN_MIN\n#define YYTOKEN_MIN \\2\n#endif\\1/
+               }" | \
+      $SED -E "{
+                N
+                s/(YYTOKEN\(([0-9]+), T_\w+\)[ \r\n\t]+\};)/\\1\n#ifndef YYTOKEN_MAX\n#define YYTOKEN_MAX \\2\n#endif\n/
+               }" | \
+      $SED -E "s/   enum yytokentype/#ifndef YYTOKEN_MAP\n#define YYTOKEN_MAP enum yytokentype\n#define YYTOKEN(num, name) name = num\n#endif\n   YYTOKEN_MAP/" \
+      > new_hphp.tab.hpp.tmp
+    rm new_hphp.tab.hpp
+    (diff -q hphp.tab.hpp new_hphp.tab.hpp.tmp >/dev/null ||
+      mv -f new_hphp.tab.hpp.tmp hphp.tab.hpp) &&
+      rm -f new_hphp.tab.hpp.tmp
+    cat new_hphp.tab.cpp | \
+      $SED -e "s/first_line/line0/" \
+           -e "s/last_line/line1/" \
+           -e "s/first_column/char0/" \
+           -e "s/last_column/char1/" \
+           -e "s/union/struct/" \
+           -e "s/YYSTACK_ALLOC \(YYSTACK_BYTES \(yystacksize\)\);\n/YYSTACK_ALLOC \(YYSTACK_BYTES \(yystacksize\)\);\n        memset(yyptr, 0, YYSTACK_BYTES (yystacksize));\n/" \
+           -e "s/YYSTACK_RELOCATE \(yyvs_alloc, yyvs\)/YYSTACK_RELOCATE_RESET (yyvs_alloc, yyvs)/" \
+           -e "s/YYSTACK_FREE \(yyss\)/YYSTACK_FREE (yyss);\n  YYSTACK_CLEANUP/" \
+      > new_hphp.tab.cpp.tmp
+    rm new_hphp.tab.cpp
+    (diff -q new_hphp.tab.cpp.tmp ../../compiler/parser/hphp.tab.cpp >/dev/null ||
+      mv -f new_hphp.tab.cpp.tmp ../../compiler/parser/hphp.tab.cpp) &&
+      rm -f new_hphp.tab.cpp.tmp
+  else
+    [ $VERBOSE -eq 1 ] && echo "No bison/sed with which to generate parser"
+  fi
+fi
+
 if [ "$1" = "license" -o "$1" = "all" ]; then
   cd $HPHP_HOME
   [ $VERBOSE -eq 1 ] && echo "Updating license headers"