Fix tokenization with new shlex version

Author: krystophny

fpm.toml

@@ -20,8 +20,8 @@ fortran-regex.git  = "https://github.com/perazz/fortran-regex"
 fortran-regex.tag  = "1.1.2"
 jonquil.git = "https://github.com/toml-f/jonquil"
 jonquil.rev = "4fbd4cf34d577c0fd25e32667ee9e41bf231ece8"
-fortran-shlex.git = "https://github.com/perazz/fortran-shlex"
-fortran-shlex.tag = "1.0.1"
+fortran-shlex.git = "https://github.com/itpplasma/fortran-shlex" # TODO: Change back to perazz
+fortran-shlex.tag = "main"  # TODO: Change back to 1.2.x
 
 [[test]]
 name = "cli-test"

src/fpm_compiler.F90

@@ -1548,8 +1548,13 @@ subroutine tokenize_flags(flags, flags_array)
     character(len=:), allocatable :: flags_char_array(:)
 
     integer :: i
+    logical :: success
 
-    flags_char_array = shlex_split(flags)
+    flags_char_array = shlex_split(flags, join_spaced=.true., keep_quotes=.true., success=success)
+    if (.not. success) then
+        allocate(flags_array(0))
+        return
+    end if
     allocate(flags_array(size(flags_char_array)))
     do i = 1, size(flags_char_array)
         flags_array(i)%s = trim(adjustl(flags_char_array(i)))