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varname-dot-parsedir.mk revision 1.8 
      1 # $NetBSD: varname-dot-parsedir.mk,v 1.8 2023/06/21 07:30:50 rillig Exp $
      2 #
      3 # Tests for the special .PARSEDIR variable, which contains the directory part
      4 # of the file that is currently parsed.
      5 #
      6 # See also
      7 #	varname-dot-includedfromdir.mk
      8 #	varname-dot-includedfromfile.mk
      9 #	varname-dot-parsefile.mk
     10 #
     11 # History
     12 #	.PARSEDIR and .PARSEFILE were added on 1999-08-09.
     13 
     14 # The .PARSEDIR may be absolute or relative, therefore there is not much that
     15 # can be tested here.
     16 .if !${.PARSEDIR:tA:M*/unit-tests}
     17 .  error
     18 .endif
     19 
     20 # During parsing, it is possible to undefine .PARSEDIR.
     21 # Not that anyone would ever want to do this, but there's code in parse.c,
     22 # function PrintLocation, that explicitly handles this situation.
     23 .if !defined(.PARSEDIR)
     24 .  error
     25 .endif
     26 .undef .PARSEDIR
     27 .if defined(.PARSEDIR)
     28 .  error
     29 .endif
     30 
     31 # The variable .PARSEDIR is indirectly used by the .info directive,
     32 # via PrintLocation.
     33 #
     34 # The .rawout file contains the full path to the current directory.
     35 # In the .out file, it is filtered out.
     36 # expect+1: At this point, .PARSEDIR is undefined.
     37 .info At this point, .PARSEDIR is undefined.
     38 
     39 # There is absolutely no point in faking the location of the file that is
     40 # being parsed.  Technically, it's possible though, but only if the file
     41 # being parsed is a relative pathname.  See PrintLocation for details.
     42 .PARSEDIR=	/fake-absolute-path
     43 .info The location can be faked in some cases.
     44 
     45 # After including another file, .PARSEDIR is reset.
     46 .include "/dev/null"
     47 # expect+1: The location is no longer fake.
     48 .info The location is no longer fake.
     49 
     50 all:
     51 	@echo At run time, .PARSEDIR is ${.PARSEDIR:Uundefined}.
     52