bsd: `BSD_PATH` rename to `COMPONENT_PATH`

@alyssais and I agreed this is clearer.

pkgs/os-specific/bsd/netbsd/default.nix

···
     }.${stdenv'.hostPlatform.parsed.cpu.name}
       or stdenv'.hostPlatform.parsed.cpu.name;
 
-    BSD_PATH = attrs.path;
+    COMPONENT_PATH = attrs.path;
 
     makeFlags = defaultMakeFlags;
 
···
     postPatch = lib.optionalString (!stdenv'.hostPlatform.isNetBSD) ''
       set +e
       grep -Zlr "^__RCSID
-      ^__BEGIN_DECLS" $BSD_PATH | xargs -0r grep -FLZ nbtool_config.h |
+      ^__BEGIN_DECLS" $COMPONENT_PATH | xargs -0r grep -FLZ nbtool_config.h |
           xargs -0tr sed -i '0,/^#/s//#include <nbtool_config.h>\n\0/'
       set -e
     '' + attrs.postPatch or "";
···
     skipIncludesPhase = true;
 
     postPatch = ''
-      patchShebangs $BSD_PATH/configure
+      patchShebangs $COMPONENT_PATH/configure
       ${self.make.postPatch}
     '';
 
···
     SHLIBINSTALLDIR = "$(out)/lib";
     makeFlags = defaultMakeFlags ++ [ "LIBDO.terminfo=${self.libterminfo}/lib" ];
     postPatch = ''
-      sed -i '1i #undef bool_t' $BSD_PATH/el.h
-      substituteInPlace $BSD_PATH/config.h \
+      sed -i '1i #undef bool_t' $COMPONENT_PATH/el.h
+      substituteInPlace $COMPONENT_PATH/config.h \
         --replace "#define HAVE_STRUCT_DIRENT_D_NAMLEN 1" ""
-      substituteInPlace $BSD_PATH/readline/Makefile --replace /usr/include "$out/include"
+      substituteInPlace $COMPONENT_PATH/readline/Makefile --replace /usr/include "$out/include"
     '';
     NIX_CFLAGS_COMPILE = [
       "-D__noinline="
···
     buildInputs = with self; compatIfNeeded;
     SHLIBINSTALLDIR = "$(out)/lib";
     postPatch = ''
-      substituteInPlace $BSD_PATH/term.c --replace /usr/share $out/share
-      substituteInPlace $BSD_PATH/setupterm.c \
+      substituteInPlace $COMPONENT_PATH/term.c --replace /usr/share $out/share
+      substituteInPlace $COMPONENT_PATH/setupterm.c \
         --replace '#include <curses.h>' 'void use_env(bool);'
     '';
     postBuild = ''
···
     MKDOC = "no"; # missing vfontedpr
     makeFlags = defaultMakeFlags ++ [ "LIBDO.terminfo=${self.libterminfo}/lib" ];
     postPatch = lib.optionalString (!stdenv.isDarwin) ''
-      substituteInPlace $BSD_PATH/printw.c \
+      substituteInPlace $COMPONENT_PATH/printw.c \
         --replace "funopen(win, NULL, __winwrite, NULL, NULL)" NULL \
         --replace "__strong_alias(vwprintw, vw_printw)" 'extern int vwprintw(WINDOW*, const char*, va_list) __attribute__ ((alias ("vw_printw")));'
-      substituteInPlace $BSD_PATH/scanw.c \
+      substituteInPlace $COMPONENT_PATH/scanw.c \
         --replace "__strong_alias(vwscanw, vw_scanw)" 'extern int vwscanw(WINDOW*, const char*, va_list) __attribute__ ((alias ("vw_scanw")));'
     '';
   };
···
     # man0 generates a man.pdf using ps2pdf, but doesn't install it later,
     # so we can avoid the dependency on ghostscript
     postPatch = ''
-      substituteInPlace $BSD_PATH/man0/Makefile --replace "ps2pdf" "echo noop "
+      substituteInPlace $COMPONENT_PATH/man0/Makefile --replace "ps2pdf" "echo noop "
     '';
     makeFlags = defaultMakeFlags ++ [
       "FILESDIR=$(out)/share"

pkgs/os-specific/bsd/setup-hook.sh

···
 }
 
 cdBSDPath() {
-  if [ -d "$BSD_PATH" ]
-    then sourceRoot=$sourceRoot/$BSD_PATH
-    cd $BSD_PATH
+  if [ -d "$COMPONENT_PATH" ]
+    then sourceRoot=$sourceRoot/$COMPONENT_PATH
+    cd $COMPONENT_PATH
   fi
 }