CMake build: add generate_wkt1_parser and generate_wkt2_parser manual target, and logic to detect when they must be run

4 files changed, 84 insertions, 1 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index bae922d5..0723d942 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -14,7 +14,11 @@ include_HEADERS = proj.h proj_experimental.h proj_constants.h geodesic.h \
 
 EXTRA_DIST = bin_cct.cmake bin_gie.cmake bin_cs2cs.cmake \
 	bin_geod.cmake bin_proj.cmake bin_projinfo.cmake \
-	lib_proj.cmake CMakeLists.txt bin_geodtest.cmake \
+	lib_proj.cmake \
+	check_md5sum.cmake \
+	generate_wkt_parser.cmake \
+	CMakeLists.txt \
+	bin_geodtest.cmake \
 	bin_projsync.cmake \
 	tests/geodtest.cpp \
 	wkt1_grammar.y wkt2_grammar.y apps/emess.h apps/utils.h \
diff --git a/src/check_md5sum.cmake b/src/check_md5sum.cmake
new file mode 100644
index 00000000..bab6fc6f
--- /dev/null
+++ b/src/check_md5sum.cmake
@@ -0,0 +1,7 @@
+file(READ "${IN_FILE}" CONTENTS)
+
+string(MD5 MD5SUM "${CONTENTS}")
+
+if(NOT("${MD5SUM}" STREQUAL "${EXPECTED_MD5SUM}"))
+    message(FATAL_ERROR "File ${IN_FILE} has been modified. target ${TARGET} should be manually run. And lib_proj.cmake should be updated with \"${MD5SUM}\"")
+endif()
diff --git a/src/generate_wkt_parser.cmake b/src/generate_wkt_parser.cmake
new file mode 100644
index 00000000..bcfc09be
--- /dev/null
+++ b/src/generate_wkt_parser.cmake
@@ -0,0 +1,18 @@
+message("Generating ${OUT_FILE}")
+
+execute_process(COMMAND "bison" "--no-lines" "-d" "-p" "${PREFIX}" "-o${OUT_FILE}" "${IN_FILE}"
+                RESULT_VARIABLE STATUS)
+
+if(STATUS AND NOT STATUS EQUAL 0)
+  message(FATAL_ERROR "bison failed")
+endif()
+
+# Post processing of the generated file
+# All those replacements are to please MSVC
+file(READ ${OUT_FILE} CONTENTS)
+string(REPLACE "yyerrorlab:" "#if 0\nyyerrorlab:" CONTENTS "${CONTENTS}")
+string(REPLACE "yyerrlab1:" "#endif\nyyerrlab1:" CONTENTS "${CONTENTS}")
+string(REPLACE "for (yylen = 0; yystr[yylen]; yylen++)" "for (yylen = 0; yystr && yystr[yylen]; yylen++)" CONTENTS "${CONTENTS}")
+string(REPLACE "return yystpcpy (yyres, yystr) - yyres;" "return (YYPTRDIFF_T)(yystpcpy (yyres, yystr) - yyres);" CONTENTS "${CONTENTS}")
+string(REPLACE "YYPTRDIFF_T yysize = yyssp - yyss + 1;" "YYPTRDIFF_T yysize = (YYPTRDIFF_T)(yyssp - yyss + 1);" CONTENTS "${CONTENTS}")
+file(WRITE "${OUT_FILE}" "${CONTENTS}")
diff --git a/src/lib_proj.cmake b/src/lib_proj.cmake
index 785ec6f0..4ece9094 100644
--- a/src/lib_proj.cmake
+++ b/src/lib_proj.cmake
@@ -298,6 +298,60 @@ source_group("CMake Files" FILES CMakeLists.txt)
 # Embed PROJ_LIB data files location
 add_definitions(-DPROJ_LIB="${CMAKE_INSTALL_PREFIX}/${DATADIR}")
 
+
+###########################################################
+# targets to refresh wkt1_parser.cpp and wkt2_parser.cpp
+###########################################################
+
+# Those targets need to be run manually each time wkt1_grammar.y / wkt2_grammar.y
+# is modified.
+# We could of course run them automatically, but that would make building
+# PROJ harder.
+
+# This target checks that wkt1_grammar.y md5sum has not changed
+# If it has, then it should be updated and the generate_wkt1_parser target
+# should be manually run
+add_custom_target(check_wkt1_grammar_md5 ALL
+                  COMMAND ${CMAKE_COMMAND}
+                      "-DIN_FILE=wkt1_grammar.y"
+                      "-DTARGET=generate_wkt1_parser"
+                      "-DEXPECTED_MD5SUM=3a1720c3fa1b759719e33dd558603efb"
+                      -P "${CMAKE_CURRENT_SOURCE_DIR}/check_md5sum.cmake"
+                  WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+                  DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/wkt1_grammar.y"
+                  VERBATIM)
+
+add_custom_target(generate_wkt1_parser
+                  COMMAND ${CMAKE_COMMAND}
+                      "-DPREFIX=pj_wkt1_"
+                      "-DIN_FILE=wkt1_grammar.y"
+                      "-DOUT_FILE=wkt1_generated_parser.c"
+                      -P "${CMAKE_CURRENT_SOURCE_DIR}/generate_wkt_parser.cmake"
+                  WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+                  VERBATIM)
+
+# This target checks that wkt2_grammar.y md5sum has not changed
+# If it has, then it should be updated and the generate_wkt2_parser target
+# should be manually run
+add_custom_target(check_wkt2_grammar_md5 ALL
+                  COMMAND ${CMAKE_COMMAND}
+                      "-DIN_FILE=wkt2_grammar.y"
+                      "-DTARGET=generate_wkt2_parser"
+                      "-DEXPECTED_MD5SUM=1691b7d213073d5a1b49db2e080bc96e"
+                      -P "${CMAKE_CURRENT_SOURCE_DIR}/check_md5sum.cmake"
+                  WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+                  DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/wkt2_grammar.y"
+                  VERBATIM)
+
+add_custom_target(generate_wkt2_parser
+                  COMMAND ${CMAKE_COMMAND}
+                      "-DPREFIX=pj_wkt2_"
+                      "-DIN_FILE=wkt2_grammar.y"
+                      "-DOUT_FILE=wkt2_generated_parser.c"
+                      -P "${CMAKE_CURRENT_SOURCE_DIR}/generate_wkt_parser.cmake"
+                  WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+                  VERBATIM)
+
 #################################################
 ## targets: libproj and proj_config.h
 #################################################