src/gray_cli.f90: allow enabling or disabling all units

src/gray_cli.f90

@@ -54,6 +54,7 @@ contains
     print '(a)', '                            (default: gray.ini)'
     print '(a)', '  -s, --sum FILE            sum the output profiles from a list of files'
     print '(a)', '  -u, --units ID[,ID...]    select which units to output (default: 4, 7);'
+    print '(a)', '                            use `all` to enable all, or `none` for no units.'
     print '(a)', '                            see the manual for all unit IDs.'
     print '(a)', '  -g, --gray-param ID=VAL   set a GRAY parameter, overriding the value'
     print '(a)', '                            specified via --params-file/--config-file;'
@@ -102,7 +103,7 @@ contains
   subroutine parse_cli_options(opts)
     ! Parse the CLI arguments and initialise the options
 
-    use units,  only : ucenr, usumm
+    use units,  only : ucenr, usumm, all_enabled
     use logger, only : WARNING
 
     implicit none
@@ -161,19 +162,29 @@ contains
         case ('-u', '--units')
           call get_next_command(i, temp)
 
-          ! resize the array
-          commas = count([(temp(i:i) == ',', i = 1, len(temp))])
-          deallocate(opts%units)
-          allocate(opts%units(commas + 1))
+          if (temp == 'none') then
+            ! disable all output units
+            deallocate(opts%units)
+            allocate(opts%units(0))
+          elseif (temp == 'all') then
+            ! enable all output units
+            all_enabled = .true.
+          else
+            ! resize the array
+            commas = count([(temp(i:i) == ',', i = 1, len(temp))])
+            deallocate(opts%units)
+            allocate(opts%units(commas + 1))
 
-          ! read the list of table IDs
-          read (temp, *, iostat=error) opts%units
-          if (error > 0) then
-            print '(a,a)', 'invalid table IDs: ', temp
-            deallocate(argument)
-            deallocate(temp)
-            call exit(1)
+            ! read the list of table IDs
+            read (temp, *, iostat=error) opts%units
+            if (error > 0) then
+              print '(a,a)', 'invalid table IDs: ', temp
+              deallocate(argument)
+              deallocate(temp)
+              call exit(1)
+            end if
           end if
+
           deallocate(temp)
 
         case ('-g', '--gray-param')

src/units.f90

@@ -20,6 +20,7 @@ module units
 #endif
 
   ! List of active units
+  logical, save :: all_enabled = .false.
   integer, allocatable, save :: active_units(:)
 
 contains
@@ -66,7 +67,7 @@ contains
     integer, intent(in)  :: unit
     logical              :: on
 
-    on = any(active_units == unit)
+    on = all_enabled .or. any(active_units == unit)
 
   end function unit_active