• In VSCODE-23, we're taking the fast path. In the future, let's work out a unified solution for VSCODE, MONGOSH, and COMPASS. Notes/ideas below.

Notes

• All of this lives in something like TypeScript-TmLanguage → MongoDB-TmLanguage and is generated following pattern of https://github.com/microsoft/TypeScript-TmLanguage

VS Code

• https://github.com/microsoft/TypeScript-TmLanguage/blob/master/build/build.ts takes canonical plist
• https://github.com/sheetalkamat/TypeScript-TmLanguage-VsCode/blob/master/build/update-grammar.js for dl master → converting plist into VS Code .json + dependency .json's

Ace Editor

• Add a build task to mongodb-ace-mode to generate https://github.com/mongodb-js/ace-mode/blob/master/index.js using ace/tool/tmlanguage.js

node ace/tool/tmlanguage.js MongoDB.tmLanguage

highlight.js

• https://highlightjs.readthedocs.io/en/latest/language-guide.html is s imilar in simplicity to ace https://cloud9-sdk.readme.io/docs/highlighting-rules
• relevant for mongosh cli and beyond (e.g. leafygreen editor/syntax component, docs, etc.)

mongosh highlighting

Output

repl uses util.inspect() which 1. can be customized 2. replace util.inspect() entirely via the writer option with something like cli-highlight or emphasize

Input

trickier... but possible.

• https://github.com/nikersify/jay "Supercharged JavaScript REPL"

• python impl of similar goal experience https://github.com/laixintao/iredis/

(HT @max for links)

• https://github.com/nikersify/jay/blob/master/source/prompt.ts#L137
  • Uses emphasize for highlighting
  • Which in turn wraps https://github.com/wooorm/lowlight
  • Which wraps highlight.js under the hood :tada:
• mongosh uses node core repl tho
  • REPLServer inherits from readline.Interface so running it through emphasize in this fall through of _ttyWrite should do it https://github.com/nodejs/node/blob/master/lib/readline.js#L1058
  • two different streams input (passed to eval) and output (whats written to term)
    eval() happens input.on('line')|https://github.com/nodejs/node/blob/master/lib/repl.js#L763 which is emitted from input here