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MDEV-25726 get rid of cmake comment hack in sql_yacc.yy

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and replace it with equally unsightly %ifdef/%endif hack
also, support %else, it's nice
This commit is contained in:
Sergei Golubchik
2021-05-22 17:47:42 +02:00
parent 288b801696
commit dfbeddaa11
7 changed files with 84 additions and 44 deletions
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39
sql/gen_yy_files.cmake Normal file
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@@ -0,0 +1,39 @@
if(POLICY CMP0054)
cmake_policy(SET CMP0054 NEW)
endif()
file(READ "${IN}" data)
file(WRITE "${OUT1}" "")
file(WRITE "${OUT2}" "")
set(where 0)
string(REGEX REPLACE "/\\* sql_yacc\\.yy \\*/" "/* DON'T EDIT THIS FILE. IT'S GENERATED. EDIT sql_yacc.yy INSTEAD */" data "${data}")
while(NOT data STREQUAL "")
string(REGEX MATCH "^(%[ie][^\n]*\n)|((%[^ie\n]|[^%\n])[^\n]*\n)+|\n+" line "${data}")
string(LENGTH "${line}" ll)
string(SUBSTRING "${data}" ${ll} -1 data)
if (line MATCHES "^%ifdef +${VAL1} *\n")
set(where 1)
set(line "\n")
elseif(line MATCHES "^%ifdef +${VAL2} *\n")
set(where 2)
set(line "\n")
elseif(line MATCHES "^%else( *| +.*)\n" AND where GREATER 0)
math(EXPR where "3-${where}")
set(line "\n")
elseif(line MATCHES "^%endif( *| +.*)\n")
set(where 0)
set(line "\n")
endif()
if(where STREQUAL 1)
file(APPEND "${OUT1}" "${line}")
string(REGEX REPLACE "[^\n]+" "" line "${line}")
file(APPEND "${OUT2}" "${line}")
elseif(where STREQUAL 2)
file(APPEND "${OUT2}" "${line}")
string(REGEX REPLACE "[^\n]+" "" line "${line}")
file(APPEND "${OUT1}" "${line}")
else()
file(APPEND "${OUT1}" "${line}")
file(APPEND "${OUT2}" "${line}")
endif()
endwhile()