vim-patch:9.1.0874: filetype: karel files are not detected

Problem:  filetype: karel files are not detected
Solution: detect '*.kl' files as karel filetype,
          include syntax and filetype plugin
          (Kirill Morozov)

closes: vim/vim#16075

https://github.com/vim/vim/commit/fdac54d7bbf6d68a8bf741e734b86d0f1998ac86

Co-authored-by: Kirill Morozov <kirill@robotix.pro>
Co-authored-by: KnoP-01 <knosowski@graeffrobotics.de>

4 files changed, 131 insertions, 0 deletions

diff --git a/runtime/ftplugin/karel.vim b/runtime/ftplugin/karel.vim
new file mode 100644
index 0000000000..8ccc2b32ce
--- /dev/null
+++ b/runtime/ftplugin/karel.vim
@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language:    KAREL
+" Last Change: 2024-11-18
+" Maintainer:  Kirill Morozov <kirill@robotix.pro>
+" Credits:     Patrick Meiser-Knosowski for the initial implementation.
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal comments=:--
+setlocal commentstring=--\ %s
+setlocal suffixesadd+=.kl,.KL
+
+let b:undo_ftplugin = "setlocal com< cms< sua<"
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index e1e73d63fe..9010adf777 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -653,6 +653,8 @@ local extension = {
   jsp = 'jsp',
   jl = 'julia',
   just = 'just',
+  kl = 'karel',
+  KL = 'karel',
   kdl = 'kdl',
   kv = 'kivy',
   kix = 'kix',
diff --git a/runtime/syntax/karel.vim b/runtime/syntax/karel.vim
new file mode 100644
index 0000000000..85c78529e6
--- /dev/null
+++ b/runtime/syntax/karel.vim
@@ -0,0 +1,112 @@
+" Vim syntax file
+" Language:    KAREL
+" Last Change: 2024-11-17
+" Maintainer:  Kirill Morozov <kirill@robotix.pro>
+" Credits:     Jay Strybis for the initial implementation and Patrick Knosowski
+"              for a couple of fixes.
+
+if exists("b:current_syntax")
+  finish
+endif
+
+" KAREL is case-insensitive
+syntax case ignore
+
+" Identifiers
+syn match   karelIdentifier  /[a-zA-Z0-9_]\+/
+hi def link karelIdentifier  Identifier
+
+" Constants
+syn keyword karelConstant    CR
+syn region  karelString      start="'" end="'"
+syn match   karelReal        /\d\+\.\d\+/
+syn match   karelInteger     /\d\+/
+syn keyword karelBoolean     true false
+hi def link karelConstant    Constant
+hi def link karelString      String
+hi def link karelInteger     Number
+hi def link karelReal        Float
+hi def link karelBoolean     Boolean
+
+" Directives
+syn match   karelDirective   /%[a-zA-Z]\+/
+hi def link karelDirective   PreProc
+
+" Operators
+syn keyword karelOperator    AND OR NOT DIV MOD
+syn match   karelOperator    /[\+\-\*\/\<\=\>\:\#\@]/
+syn match   karelOperator    /<=/
+syn match   karelOperator    />=/
+syn match   karelOperator    /<>/
+syn match   karelOperator    />=</
+hi def link karelOperator    Operator
+
+" Types
+syn keyword karelType        ARRAY BOOLEAN BYTE CONFIG DISP_DAT_T FILE INTEGER JOINTPOS PATH POSITION QUEUE_TYPE REAL SHORT STD_PTH_NODE STRING VECTOR XYZWPR XYZWPREXT
+syn keyword karelStructure   STRUCTURE ENDSTRUCTURE
+hi def link karelType        Type
+hi def link karelStructure   Typedef
+
+syn keyword karelAction      NOABORT NOMESSAGE NOPAUSE PAUSE PULSE RESUME STOP UNHOLD UNPAUSE
+syn match   karelAction      /SIGNAL EVENT/
+syn match   karelAction      /SIGNAL SEMAPHORE/
+hi def link karelAction      Keyword
+
+syn keyword karelFunction    ABS ACOS APPROACH ARRAY_LEN ASIN ATAN2 ATTACH BYNAME BYTES_LEFT CHR COS CURJPOS CURPOS CURR_PROG EXP
+syn keyword karelFunction    FRAME GET_FILE_POS GET_JPOS_REG GET_JPOS_TPE GET_PORT_ATR GET_POS_REG GET_POS_TPE GET_USEC_TIM INDEX
+syn keyword karelFunction    IN_RANGE INV IO_STATUS J_IN_RANGE JOINT2POS LN MIRROR MOTION_CTL NODE_SIZE ORD ORIENT PATH_LEN POS POS2JOINT
+syn keyword karelFunction    ROUND SEMA_COUNT SIN SQRT STR_LEN SUB_STR TAN TRUNC UNINIT
+hi def link karelFunction    Function
+
+syn keyword karelClause      EVAL FROM IN WHEN WITH
+hi def link karelClause      Keyword
+
+syn keyword karelConditional IF THEN ELSE ENDIF SELECT ENDSELECT CASE
+hi def link karelConditional Conditional
+
+syn keyword karelRepeat      WHILE DO ENDWHILE FOR
+hi def link karelRepeat      Repeat
+
+syn keyword karelProcedure   ABORT_TASK ACT_SCREEN ACT_TBL ADD_BYNAMEPC ADD_DICT ADD_INTPC ADD_REALPC ADD_STRINGPC APPEND_NODE APPEND_QUEUE
+syn keyword karelProcedure   ATT_WINDOW_D ATT_WINDOW_S AVL_POS_NUM
+syn keyword karelProcedure   BYTES_AHEAD
+syn keyword karelProcedure   CALL_PROG CALL_PROGLIN CHECK_DICT CHECK_EPOS CHECK_NAME CLEAR CLEAR_SEMA CLOSE_TEP CLR_IO_STAT CLR_PORT_SIM CLR_POS_REG
+syn keyword karelProcedure   CNC_DYN_DISB CNC_DYN_DISE CNC_DYN_DISI CNC_DYN_DISP CNC_DYN_DISR CNC_DYN_DISS CNCL_STP_MTN CNV_CNF_STRG CNV_CONF_STR CNV_INT_STR CNV_JPOS_REL CNV_REAL_STR CNV_REL_JPOS CNV_STR_CONF CNV_STR_INT CNV_STR_REAL CNV_STR_TIME CNV_TIME_STR
+syn keyword karelProcedure   COMPARE_FILE CONT_TASK COPY_FILE COPY_PATH COPY_QUEUE COPY_TPE CREATE_TPE CREATE_VAR
+syn keyword karelProcedure   DAQ_CHECKP DAQ_REGPIPE DAQ_START DAQ_STOP DAQ_UNREG DAQ_WRITE DEF_SCREEN DEF_WINDOW
+syn keyword karelProcedure   DELETE_FILE DELETE_NODE DELETE_QUEUE DEL_INST_TPE DET_WINDOW DISCTRL_ALPH DISCTRL_FORM DISCTRL_LIST DISCTRL_PLMN DISCTRL_SBMN DISCTRL_TBL DISMOUNT_DEV DOSFILE_INF
+syn keyword karelProcedure   ERR_DATA FILE_LIST FORCE_SPMENU FORMAT_DEV GET_ATTR_PRG GET_PORT_ASG GET_PORT_CMT GET_PORT_MOD GET_PORT_SIM GET_PORT_VAL GET_POS_FRM GET_POS_TYP GET_PREG_CMT GET_QUEUE
+syn keyword karelProcedure   GET_REG GET_REG_CMT GET_SREG_CMT GET_STR_REG GET_TIME GET_TPE_CMT GET_TPE_PRM GET_TSK_INFO GET_USEC_SUB GET_VAR
+syn keyword karelProcedure   INI_DYN_DISB INI_DYN_DISE INI_DYN_DISI INI_DYN_DISP INI_DYN_DISR INI_DYN_DISS INIT_QUEUE INIT_TBL INSERT_NODE INSERT_QUEUE IO_MOD_TYPE
+syn keyword karelProcedure   KCL KCL_NO_WAIT KCL_STATUS LOAD LOAD_STATUS LOCK_GROUP MODIFY_QUEUE MOUNT_DEV MOVE_FILE MSG_CONNECT MSG_DISO MSG_PING
+syn keyword karelProcedure   OPEN_TPE PAUSE_TASK PEND_SEMA PIPE_CONFIG POP_KEY_RD POS_REG_TYPE POST_ERR POST_ERR_L POST_SEMA PRINT_FILE PROG_BACKUP PROG_CLEAR PROG_RESTORE PROG_LIST
+syn keyword karelProcedure   PURGE_DEV PUSH_KEY_RD READ_DICT READ_DICT_V READ_KB REMOVE_DICT RENAME_FILE RENAME_VAR RENAME_VARS RESET RUN_TASK SAVE SAVE_DRAM SELECT_TPE SEND_DATAPC SEND_EVENTPC SET_ATTR_PRG SET_CURSOR SET_EPOS_REG SET_EPOS_TPE
+syn keyword karelProcedure   SET_FILE_ATR SET_FILE_POS SET_INT_REG SET_JPOS_REG SET_JPOS_TPE SET_LANG SET_PERCH SET_PORT_ASG SET_PORT_ATR SET_PORT_CMT SET_PORT_MOD SET_PORT_SIM SET_PORT_VAL SET_POS_REG SET_POS_TPE SET_PREG_CMT SET_REAL_REG SET_REG CMT SET_SREG_CMT SET_STR_REG SET_TIME SET_TPE_CMT SET_TRNS_TPE SET_TSK_ATTR SET_TSK_NAME SET_VAR
+syn keyword karelProcedure   TRANSLATE UNLOCK_GROUP UNPOS V_CAM_CALIB V_GET_OFFSET V_GET_PASSFL V_GET_QUEUE V_INIT_QUEUE V_RALC_QUEUE V_RUN_FIND V_SET_REF V_START_VTRK V_STOP_VTRK VAR_INFO VAR_LIST VOL_SPACE VREG_FND_POS VREG_OFFSET
+syn keyword karelProcedure   WRITE_DICT WRITE_DICT_V XML_ADDTAG XML_GETDATA XML_REMTAG XML_SCAN XML_SETVAR
+hi def link karelProcedure   Function
+
+syn keyword karelStatement   ABORT CONDITION ENDCONDITION CONTINUE DELAY ERROR EVENT FOR ENDFOR HOLD READ RELEASE REPEAT RETURN SEMAPHORE UNTIL USING ENDUSING WRITE
+syn match   karelStatement   /CANCEL FILE/
+syn match   karelStatement   /CLOSE FILE/
+syn match   karelStatement   /CLOSE HAND/
+syn match   karelStatement   /CONNECT TIMER/
+syn match   karelStatement   /DISABLE CONDITION/
+syn match   karelStatement   /DISCONNECT TIMER/
+syn match   karelStatement   /ENABLE CONDITION/
+syn match   karelStatement   /GO TO/
+syn match   karelStatement   /OPEN FILE/
+syn match   karelStatement   /OPEN HAND/
+syn match   karelStatement   /PURGE CONDITION/
+syn match   karelStatement   /RELAX HAND/
+syn match   karelStatement   /WAIT FOR/
+hi def link karelStatement   Statement
+
+syn keyword karelKeyword     BEGIN CONST END PROGRAM ROUTINE STRUCT TYPE VAR
+hi def link karelKeyword     Keyword
+
+" Comments
+syn region karelComment      start="--" end="$"
+hi def link karelComment     Comment
+
+let b:current_syntax = "karel"
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 19b7d41552..2749a6a200 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -392,6 +392,7 @@ func s:GetFilenameChecks() abort
     \ 'jsp': ['file.jsp'],
     \ 'julia': ['file.jl'],
     \ 'just': ['justfile', 'Justfile', '.justfile', 'config.just'],
+    \ 'karel': ['file.kl', 'file.KL'],
     \ 'kconfig': ['Kconfig', 'Kconfig.debug', 'Kconfig.file', 'Config.in', 'Config.in.host'],
     \ 'kdl': ['file.kdl'],
     \ 'kivy': ['file.kv'],