cfmleditor-lsp

README

cfmleditor-lsp

A Language Server Protocol (LSP) implementation for CFML / ColdFusion, written in Go.

Uses tree-sitter-cfml.

Build

go build -o cfmleditor-lsp .

Run

The server communicates over stdio using JSON-RPC 2.0 with LSP headers:

./cfmleditor-lsp

Configure your editor to launch this binary as an LSP server for .cfm, .cfc, .cfml, and .cfs files.

Configuration

Place a .cfmleditor.json file in your project root to enable daemon mode and configure workspace indexing.

{
  "workspaceName": "myproject",
  "workspacePaths": [".", "../shared-lib"],
  "mappings": {
    "models": "./src/models"
  },
  "componentResolvers": [
    {
      "match": "getService(\"$1\")",
      "resolve": "packages.$1.service",
      "prefix": "getService"
    }
  ]
}

Field	Required	Description
workspaceName	Yes	Unique project name. Used to derive the daemon socket path so multiple projects don't collide.
workspacePaths	No	Relative paths to folders the LSP should treat as workspace roots. Resolved relative to the config file location.
workspaceIndexGlobs	No	Glob patterns to filter which .cfc files are indexed.
mappings	No	Component path mappings. Keys are the first segment of a dot-path, values are directory paths (absolute or relative to config).
componentResolvers	No	Custom patterns for resolving method calls to component paths. See below.
formatting	No	Formatter configuration object. See below.
debug	No	Enable debug logging (zap.NewDevelopment). Outputs verbose logs to stderr.

Mappings

Mappings let you resolve component dot-paths that use a virtual root. For example, with "models": "./src/models", the dot-path models.User resolves to ./src/models/User.cfc.

Component resolvers

Component resolvers teach the LSP how to resolve custom factory patterns to specific CFCs. This enables goto-definition and dot-completion for variables assigned from those patterns.

"componentResolvers": [
  {
    "match": "getService(\"$1\")",
    "resolve": "packages.$1.service",
    "prefix": "getService"
  },
  {
    "match": "_parent",
    "resolve": "packages.tass.core.kernel2",
    "prefix": "_parent"
  }
]

Field	Required	Description
match	Yes	Pattern to match against the RHS of an assignment. Use $1 as a capture placeholder. Without $1, acts as an exact variable name match.
resolve	Yes	Component dot-path or file path template. $1 is replaced with the captured value. File paths (with / or .cfc) are normalised to dot-paths.
prefix	Yes	Fast-check string. Lines without this prefix are skipped entirely — avoids expensive matching on every line.

The match is case-insensitive and works regardless of qualifiers before it. For example, getService("$1") matches all of:

• getService("timetable")
• _parent.getService("timetable")
• VARIABLES._parent.getService("timetable")

Formatting

The formatting object controls the built-in formatter invoked via textDocument/formatting.

"formatting": {
  "enabled": true,
  "selfCloseTags": true,
  "whitespaceOnly": true,
  "lowercaseTags": true,
  "lowercaseAttributes": true,
  "doubleQuoteAttributes": true,
  "uppercaseSqlKeywords": true,
  "scopeCase": "leave",
  "lineWidth": 100,
  "attrBreakThreshold": 4,
  "indentWidth": 4
}

Field	Default	Description
enabled	false	Enable the formatter. When false, formatting requests are ignored.
selfCloseTags	true	Convert void/implicit-end HTML tags to self-closing form (e.g. <br> → <br />).
whitespaceOnly	true	Reject formatting results that change non-whitespace content (safety guard).
lowercaseTags	true	Lowercase CF tag names (e.g. <CFOUTPUT> → <cfoutput>).
lowercaseAttributes	true	Lowercase attribute names.
doubleQuoteAttributes	true	Normalize attribute values to double quotes.
uppercaseSqlKeywords	true	Uppercase SQL keywords inside <cfquery> blocks.
scopeCase	"leave"	Case for CFML scope names. Values: "upper", "lower", "leave".
lineWidth	100	Soft column limit — attributes expand to separate lines when a tag exceeds this width.
attrBreakThreshold	4	Number of attributes above which they are always expanded onto separate lines.
indentWidth	4	Spaces per indentation level. Overridden by editor tabSize when provided.
debug	false	Enable formatter debug checks.

Note: useTabs and tabSize are taken from the editor's formatting options (sent with each formatting request), not from this config.

Daemon mode

When .cfmleditor.json is found (in the current directory or one level up), the server starts in daemon mode:

1. The first editor session becomes the daemon, listening on a Unix socket and serving LSP over stdio.
2. Subsequent sessions connect to the existing daemon via the socket, sharing a single index.
3. The daemon shuts down automatically when all editor sessions disconnect.

Without a config file the server runs in standalone mode — a single session with its own index.

Indexing behaviour

• If workspaceIndexGlobs is set, only .cfc files matching those patterns are indexed.
• If only workspacePaths is set, all .cfc files under those folders are indexed.
• If neither is set, the LSP falls back to indexing workspace folders reported by the editor.

Status

• Initialize / Shutdown / Exit
• textDocument/didOpen
• textDocument/didChange (full sync)
• textDocument/didClose

Local Development

Add cfmleditor-lsp to your path

sudo ln -sf ~/development/github/cfmleditor-lsp/target/release/cfmleditor-lsp /usr/local/bin/cfmleditor-lsp