vim-patch:9.1.0972: filetype: TI linker map files are not recognized

Problem:  filetype: TI linker map files are not recognized
Solution: detect TI linker map files as lnkmap filetype
          (Wu, Zhenyu)

References:
https://downloads.ti.com/docs/esd/SPRUI03A/Content/SPRUI03A_HTML/linker_description.html

closes: vim/vim#16324

5113831d16

Co-authored-by: Wu, Zhenyu <wuzhenyu@ustc.edu>

runtime/ftplugin/lnkmap.vim

@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language:	TI Linker map
+" Document:	https://downloads.ti.com/docs/esd/SPRUI03A/Content/SPRUI03A_HTML/linker_description.html
+" Maintainer:	Wu, Zhenyu <wuzhenyu@ustc.edu>
+" Last Change:	2024 Dec 25
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Don't load another plugin for this buffer
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl iskeyword<"
+
+setl iskeyword+=.

runtime/lua/vim/filetype.lua

@@ -736,7 +736,7 @@ local extension = {
   mk = detect.make,
   mak = detect.make,
   page = 'mallard',
-  map = 'map',
+  map = detect_line1('^%*+$', 'lnkmap', 'map'),
   mws = 'maple',
   mpl = 'maple',
   mv = 'maple',

runtime/syntax/lnkmap.vim

@@ -0,0 +1,35 @@
+" Vim syntax file
+" Language:	TI Linker map
+" Document:	https://downloads.ti.com/docs/esd/SPRUI03A/Content/SPRUI03A_HTML/linker_description.html
+" Maintainer:	Wu, Zhenyu <wuzhenyu@ustc.edu>
+" Last Change:	2024 Dec 25
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn match lnkmapTime			">> .*$"
+syn region lnkmapHeadline		start="^\*\+$" end="^\*\+$"
+syn match lnkmapHeadline		"^[A-Z][-A-Z0-9 ']*\ze\%(:\|$\)"
+syn match lnkmapSectionDelim		"^=\+$"
+syn match lnkmapTableDelim		"\%(^\|\s\)\zs---*\ze\%($\|\s\)"
+syn match lnkmapNumber			"\%(^\|\s\)\zs[0-9a-f]\+\ze\%($\|\s\)"
+syn match lnkmapSections      		'\<\.\k\+\>'
+syn match lnkmapFile			'[^ =]\+\%(\.\S\+\)\+\>'
+syn match lnkmapLibFile			'[^ =]\+\.lib\>'
+syn match lnkmapAttrib			'\<[RWIX]\+\>'
+syn match lnkmapAttrib			'\s\zs--HOLE--\ze\%\(\s\|$\)'
+syn keyword lnkmapAttrib		UNINITIALIZED
+
+
+hi def link lnkmapTime			Comment
+hi def link lnkmapHeadline		Title
+hi def link lnkmapSectionDelim		PreProc
+hi def link lnkmapTableDelim		PreProc
+hi def link lnkmapNumber		Number
+hi def link lnkmapSections		Macro
+hi def link lnkmapFile			String
+hi def link lnkmapLibFile		Special
+hi def link lnkmapAttrib		Type
+
+let b:current_syntax = "lnkmap"

test/old/testdir/test_filetype.vim

@@ -459,7 +459,6 @@ func s:GetFilenameChecks() abort
     \ 'mallard': ['file.page'],
     "\ 'man': ['file.man'],
     \ 'manconf': ['/etc/man.conf', 'man.config', 'any/etc/man.conf'],
-    \ 'map': ['file.map'],
     \ 'maple': ['file.mv', 'file.mpl', 'file.mws'],
     \ 'markdown': ['file.markdown', 'file.mdown', 'file.mkd', 'file.mkdn', 'file.mdwn', 'file.md'],
     \ 'masm': ['file.masm'],
@@ -2765,6 +2764,24 @@ func Test_make_file()
   filetype off
 endfunc
 
+func Test_map_file()
+  filetype on
+
+  " TI linker map file
+  call writefile(['******************************************************************************', '               TMS320C6x Linker Unix v7.4.24                   ', '******************************************************************************'], 'Xfile.map', 'D')
+  split Xfile.map
+  call assert_equal('lnkmap', &filetype)
+  bwipe!
+
+  " TI linker map file
+  call writefile(['MAP', 'NAME "local-demo"', 'END'], 'Xfile.map', 'D')
+  split Xfile.map
+  call assert_equal('map', &filetype)
+  bwipe!
+
+  filetype off
+endfunc
+
 func Test_org_file()
   filetype on