Lua: vim.env, vim.{g,v,w,bo,wo} #11442

- Add vim variable meta accessors: vim.env, vim.{g,v,w,bo,wo}
- Redo gen_char_blob to generate multiple blobs instead of just one
  so that multiple Lua modules can be inlined.
- Reorder vim.lua inclusion so that it can use previously defined C
  functions and utility functions like vim.shared and vim.inspect things.
- Inline shared.lua into nvim, but also keep it available in runtime.

src/nvim/generators/gen_char_blob.lua

@@ -1,49 +1,59 @@
 if arg[1] == '--help' then
   print('Usage:')
-  print('  gencharblob.lua source target varname')
+  print('  '..arg[0]..' target source varname [source varname]...')
   print('')
   print('Generates C file with big uint8_t blob.')
   print('Blob will be stored in a static const array named varname.')
   os.exit()
 end
 
-assert(#arg == 3)
+assert(#arg >= 3 and (#arg - 1) % 2 == 0)
 
-local source_file = arg[1]
-local target_file = arg[2]
-local varname = arg[3]
-
-local source = io.open(source_file, 'r')
+local target_file = arg[1] or error('Need a target file')
 local target = io.open(target_file, 'w')
 
 target:write('#include <stdint.h>\n\n')
-target:write(('static const uint8_t %s[] = {\n'):format(varname))
 
-local num_bytes = 0
-local MAX_NUM_BYTES = 15  -- 78 / 5: maximum number of bytes on one line
-target:write(' ')
-
-local increase_num_bytes
-increase_num_bytes = function()
-  num_bytes = num_bytes + 1
-  if num_bytes == MAX_NUM_BYTES then
-    num_bytes = 0
-    target:write('\n ')
+local varnames = {}
+for argi = 2, #arg, 2 do
+  local source_file = arg[argi]
+  local varname = arg[argi + 1]
+  if varnames[varname] then
+    error(string.format("varname %q is already specified for file %q", varname, varnames[varname]))
   end
-end
+  varnames[varname] = source_file
 
-for line in source:lines() do
-  for i = 1,string.len(line) do
-    local byte = string.byte(line, i)
-    assert(byte ~= 0)
-    target:write(string.format(' %3u,', byte))
+  local source = io.open(source_file, 'r')
+      or error(string.format("source_file %q doesn't exist", source_file))
+
+  target:write(('static const uint8_t %s[] = {\n'):format(varname))
+
+  local num_bytes = 0
+  local MAX_NUM_BYTES = 15  -- 78 / 5: maximum number of bytes on one line
+  target:write(' ')
+
+  local increase_num_bytes
+  increase_num_bytes = function()
+    num_bytes = num_bytes + 1
+    if num_bytes == MAX_NUM_BYTES then
+      num_bytes = 0
+      target:write('\n ')
+    end
+  end
+
+  for line in source:lines() do
+    for i = 1, string.len(line) do
+      local byte = line:byte(i)
+      assert(byte ~= 0)
+      target:write(string.format(' %3u,', byte))
+      increase_num_bytes()
+    end
+    target:write(string.format(' %3u,', string.byte('\n', 1)))
     increase_num_bytes()
   end
-  target:write(string.format(' %3u,', string.byte('\n', 1)))
-  increase_num_bytes()
+
+  target:write('   0};\n')
+  source:close()
 end
 
-target:write('   0};\n')
-
-source:close()
 target:close()