Add script to update state config type and README default config from init.lua

# Details

Currently any time an argument is added to the configuration, it
needs to replicated in 3 places:
- `init.lua` with the user config classes and default configuration
- `state.lua` with non optional main config
- `README.md` with the updated default config

This is mildly annoying and error prone.

Instead use `init.lua` as our source of truth and replicate this
information to `state.lua` and `README.md`. Logic is contained
in `scripts/update.py` and can be executed with `just update`.

To make this easier 2 other changes were made:
- Rather than storing the config classes like `render.md.Config`
  in `state.lua` move this to a new module `types.lua`. By doing
  this we avoid needing special handling for the other information
  contained in `state.lua` and instead can fully overwrite `types.lua`.
- Add comments on default config currently only in `README.md` to
  the config in `init.lua`, that way when the configuration is pulled
  the comments get included as well with no special logic.

Author: MeanderingProgrammer

justfile

@@ -17,6 +17,9 @@ demo zoom=default_zoom:
     --last-frame-duration 1
   rm demo.cast
 
+update:
+  python -Wignore scripts/update.py
+
 gen-doc:
   # https://github.com/kdheepak/panvimdoc
   # https://pandoc.org/

lua/render-markdown/init.lua

@@ -64,8 +64,12 @@ local M = {}
 function M.setup(opts)
     ---@type render.md.Config
     local default_config = {
+        -- Configure whether Markdown should be rendered by default or not
         start_enabled = true,
+        -- Maximum file size (in MB) that this plugin will attempt to render
+        -- Any file larger than this will effectively be ignored
         max_file_size = 1.5,
+        -- Capture groups that get pulled from markdown
         markdown_query = [[
             (atx_heading [
                 (atx_h1_marker)
@@ -97,37 +101,60 @@ function M.setup(opts)
             (pipe_table_delimiter_row) @table_delim
             (pipe_table_row) @table_row
         ]],
+        -- Capture groups that get pulled from inline markdown
         inline_query = [[
             (code_span) @code
 
             (shortcut_link) @callout
         ]],
+        -- The level of logs to write to file: vim.fn.stdpath('state') .. '/render-markdown.log'
+        -- Only intended to be used for plugin development / debugging
         log_level = 'error',
+        -- Filetypes this plugin will run on
         file_types = { 'markdown' },
+        -- Vim modes that will show a rendered view of the markdown file
+        -- All other modes will be uneffected by this plugin
         render_modes = { 'n', 'c' },
+        -- Characters that will replace the # at the start of headings
         headings = { '󰲡 ', '󰲣 ', '󰲥 ', '󰲧 ', '󰲩 ', '󰲫 ' },
+        -- Character to use for the horizontal break
         dash = '—',
+        -- Character to use for the bullet points in lists
         bullets = { '●', '○', '◆', '◇' },
         checkbox = {
+            -- Character that will replace the [ ] in unchecked checkboxes
             unchecked = '󰄱 ',
+            -- Character that will replace the [x] in checked checkboxes
             checked = ' ',
         },
+        -- Character that will replace the > at the start of block quotes
         quote = '┃',
+        -- Symbol / text to use for different callouts
         callout = {
             note = '  Note',
             tip = '  Tip',
             important = '󰅾  Important',
             warning = '  Warning',
             caution = '󰳦  Caution',
         },
+        -- See :h 'conceallevel' for more information about meaning of values
         conceal = {
+            -- conceallevel used for buffer when not being rendered, get user setting
             default = vim.opt.conceallevel:get(),
+            -- conceallevel used for buffer when being rendered
             rendered = 3,
         },
+        -- Determines how tables are rendered
+        --  full: adds a line above and below tables + normal behavior
+        --  normal: renders the rows of tables
+        --  none: disables rendering, use this if you prefer having cell highlights
         table_style = 'full',
+        -- Define the highlight groups to use when rendering various components
         highlights = {
             heading = {
+                -- Background of heading line
                 backgrounds = { 'DiffAdd', 'DiffChange', 'DiffDelete' },
+                -- Foreground of heading character only
                 foregrounds = {
                     'markdownH1',
                     'markdownH2',
@@ -137,19 +164,29 @@ function M.setup(opts)
                     'markdownH6',
                 },
             },
+            -- Horizontal break
             dash = 'LineNr',
+            -- Code blocks
             code = 'ColorColumn',
+            -- Bullet points in list
             bullet = 'Normal',
             checkbox = {
+                -- Unchecked checkboxes
                 unchecked = '@markup.list.unchecked',
+                -- Checked checkboxes
                 checked = '@markup.heading',
             },
             table = {
+                -- Header of a markdown table
                 head = '@markup.heading',
+                -- Non header rows in a markdown table
                 row = 'Normal',
             },
+            -- LaTeX blocks
             latex = '@markup.math',
+            -- Quote character in a block quote
             quote = '@markup.quote',
+            -- Highlights to use for different callouts
             callout = {
                 note = 'DiagnosticInfo',
                 tip = 'DiagnosticOk',

lua/render-markdown/state.lua

@@ -1,59 +1,3 @@
----@class render.md.Callout
----@field public note string
----@field public tip string
----@field public important string
----@field public warning string
----@field public caution string
-
----@class render.md.TableHighlights
----@field public head string
----@field public row string
-
----@class render.md.CheckboxHighlights
----@field public unchecked string
----@field public checked string
-
----@class render.md.HeadingHighlights
----@field public backgrounds string[]
----@field public foregrounds string[]
-
----@class render.md.Highlights
----@field public heading render.md.HeadingHighlights
----@field public dash string
----@field public code string
----@field public bullet string
----@field public checkbox render.md.CheckboxHighlights
----@field public table render.md.TableHighlights
----@field public latex string
----@field public quote string
----@field public callout render.md.Callout
-
----@class render.md.Conceal
----@field public default integer
----@field public rendered integer
-
----@class render.md.Checkbox
----@field public unchecked string
----@field public checked string
-
----@class render.md.Config
----@field public start_enabled boolean
----@field public max_file_size number
----@field public markdown_query string
----@field public inline_query string
----@field public log_level 'debug'|'error'
----@field public file_types string[]
----@field public render_modes string[]
----@field public headings string[]
----@field public dash string
----@field public bullets string[]
----@field public checkbox render.md.Checkbox
----@field public quote string
----@field public callout render.md.Callout
----@field public conceal render.md.Conceal
----@field public table_style 'full'|'normal'|'none'
----@field public highlights render.md.Highlights
-
 ---@class render.md.State
 ---@field config render.md.Config
 ---@field enabled boolean

lua/render-markdown/types.lua

@@ -0,0 +1,55 @@
+---@class render.md.Callout
+---@field public note string
+---@field public tip string
+---@field public important string
+---@field public warning string
+---@field public caution string
+
+---@class render.md.TableHighlights
+---@field public head string
+---@field public row string
+
+---@class render.md.CheckboxHighlights
+---@field public unchecked string
+---@field public checked string
+
+---@class render.md.HeadingHighlights
+---@field public backgrounds string[]
+---@field public foregrounds string[]
+
+---@class render.md.Highlights
+---@field public heading render.md.HeadingHighlights
+---@field public dash string
+---@field public code string
+---@field public bullet string
+---@field public checkbox render.md.CheckboxHighlights
+---@field public table render.md.TableHighlights
+---@field public latex string
+---@field public quote string
+---@field public callout render.md.Callout
+
+---@class render.md.Conceal
+---@field public default integer
+---@field public rendered integer
+
+---@class render.md.Checkbox
+---@field public unchecked string
+---@field public checked string
+
+---@class render.md.Config
+---@field public start_enabled boolean
+---@field public max_file_size number
+---@field public markdown_query string
+---@field public inline_query string
+---@field public log_level 'debug'|'error'
+---@field public file_types string[]
+---@field public render_modes string[]
+---@field public headings string[]
+---@field public dash string
+---@field public bullets string[]
+---@field public checkbox render.md.Checkbox
+---@field public quote string
+---@field public callout render.md.Callout
+---@field public conceal render.md.Conceal
+---@field public table_style 'full'|'normal'|'none'
+---@field public highlights render.md.Highlights

scripts/requirements.txt

@@ -0,0 +1,2 @@
+tree_sitter==0.21.3
+tree_sitter_languages==1.10.2

scripts/update.py

@@ -0,0 +1,92 @@
+from pathlib import Path
+from textwrap import dedent
+
+from tree_sitter_languages import get_language, get_parser
+
+
+def main() -> None:
+    init_file: Path = Path("lua/render-markdown/init.lua")
+    update_types(init_file)
+    update_readme(init_file)
+
+
+def update_types(init_file: Path) -> None:
+    lines: list[str] = []
+    for comment in get_comments(init_file):
+        comment_type: str = comment.split()[0].split("@")[-1]
+        if comment_type in ["class", "field"]:
+            comment = comment.replace("User", "")
+            if comment_type == "field":
+                assert "?" in comment, f"All fields must be optional: {comment}"
+                comment = comment.replace("?", "")
+            if comment_type == "class" and len(lines) > 0:
+                lines.append("")
+            lines.append(comment)
+    lines.append("")
+
+    types_file: Path = Path("lua/render-markdown/types.lua")
+    types_file.write_text("\n".join(lines))
+
+
+def update_readme(init_file: Path) -> None:
+    default_config = get_default_config(init_file)
+    new_config = "    require('render-markdown').setup(" + default_config + ")"
+    new_config = dedent(new_config)
+
+    readme_file = Path("README.md")
+    current_config = get_readme_config(readme_file)
+
+    text = readme_file.read_text()
+    text = text.replace(current_config, new_config)
+    readme_file.write_text(text)
+
+
+def get_comments(file: Path) -> list[str]:
+    query = "(comment) @comment"
+    return ts_query(file, query, "comment")
+
+
+def get_default_config(file: Path) -> str:
+    query = """
+        (local_variable_declaration(
+            (variable_list(
+                variable name: (identifier) @name
+                (#eq? @name "default_config")
+            ))
+            (expression_list value: (table)) @value
+        ))
+    """
+    default_configs = ts_query(file, query, "value")
+    assert len(default_configs) == 1
+    return default_configs[0]
+
+
+def get_readme_config(file: Path) -> str:
+    query = "(code_fence_content) @content"
+    code_blocks = ts_query(file, query, "content")
+    query_code_blocks = [code for code in code_blocks if "query" in code]
+    assert len(query_code_blocks) == 1
+    return query_code_blocks[0]
+
+
+def ts_query(file: Path, query_string: str, target: str) -> list[str]:
+    ts_language: str = {
+        ".lua": "lua",
+        ".md": "markdown",
+    }[file.suffix]
+    parser = get_parser(ts_language)
+    tree = parser.parse(file.read_text().encode())
+
+    language = get_language(ts_language)
+    query = language.query(query_string)
+    captures = query.captures(tree.root_node)
+
+    values: list[str] = []
+    for node, capture in captures:
+        if capture == target:
+            values.append(node.text.decode())
+    return values
+
+
+if __name__ == "__main__":
+    main()