Don't use a script if a longer line is ok in meson.build

meson.build

@@ -93,8 +93,8 @@ generated_deps = [ declare_dependency( link_with: static_library( 'generated'
                                                                                  , command: [ find_program('xxd'), '-i', '@INPUT@', '@OUTPUT@' ] ) ]
                                                                 , [ custom_target( 'manpath'
                                                                                  , output: 'manpath.c'
-                                                                                 , input: 'scripts/getmanpath.sh'
-                                                                                 , command: [ find_program('scripts/getmanpath.sh'), '@OUTPUT@' ] ) ] )
+                                                                                 , input: 'meson.build'
+                                                                                 , command: [ find_program('sh'), '-c', 'echo \'const char *man_executable_path = "\'"$(which man)"\'";\' > @OUTPUT@' ] ) ] )
                                      ) ]
 
 lib = static_library( 'lektor'

scripts/getmanpath.sh

-#!/bin/sh
-
-# $1: output file
-[ $# -ne 1 ] && exit 1
-echo "const char *man_executable_path = \"$(which man)\";" > "$1"