SDML Mode for Emacs

This package provides an Emacs tree-sitter based major mode for SDML - the Simple Domain Modeling Language.

Installing

Install is easiest from MELPA, here's how with use-package.

(use-package sdml-mode)

Or, interactively; M-x package-install RET sdml-mode RET

Install manually

First clone the Git repository to a local path.

git clone https://github.com/sdm-lang/emacs-sdml-mode.git

The following uses use-package but any equivalent package manager should work.

(use-package sdml-mode
  :load-path "/path/to/repo")

Tree-Sitter Parser

Additionally you will need to manually install the parser at this time. Start by cloning the repository.

git clone https://github.com/sdm-lang/tree-sitter-sdml.git

Build just the parser dynamic library, but importantly you need to select a specific ABI version.

TS_GENERATE_ABI=13 make build_parser

Finally copy the dynamic library to a location in the path specified by the Emacs variable tree-sitter-load-path.

cp build/libtree-sitter-sdml.dylib ~/.tree-sitter/bin/sdml.dylib

Usage

Once installed the major mode should be used for any file ending in .sdm or .sdml with highlighting and indentation support.

Highlighting

Syntax highlighting is provided by the tree-sitter-hl-mode minor mode based on the configuration in the constant sdml-mode-tree-sitter-hl-patterns.

The sdml-mode also adds to the prettify-symbols-alist list, the set of symbols is in the custom variable sdml-prettify-symbols-alist.

Indentation

Line indentation is provided by the tree-sitter-indent-mode minor mode based on the configuration in the constant sdml-mode-folding-definitions.

Default indentation is two spaces, although this can be overridden by the custom variable sdml-mode-indent-offset.

Ctags Support

Using Universal Ctags and the sdml-ctags package provides a tagging solution for SDML source. The sdml-mode-ctags-mode will determine if company-mode installed and add SDML as a supported tag backend. Additionally, this minor mode provides a command to re-create the project's tag file. The image below shows company used as the completion UI for type completion when editing.

Command sdml-mode-ctags-generate has the default binding C-c C-s T. It uses the variables sdml-mode-ctags-command and sdml-mode-ctags-output-file-name to generate the tag file.

Tool Commands

A number of the tools provided by the SDML command-line tool are exposed as Emacs commands. The following image shows two tools in use, the module dependency tree and the validation tool.

Dependency Tree

• Command sdml-mode-current-buffer-dependency-tree has the default binding C-c C-s t.
• The command will prompt for the maximum depth of the tree where 0 means unbounded. This is a command prefix and can therefore be specified with the usual C-u binding.
• The resulting tree view can be refreshed using the common binding of g and quit with q.

Dependency Graph

If running under a window-sytem it is also possible to display the current buffer's dependencies as a directed graph. The tool will generate an SVG and display in a read-only window.

• Command sdml-mode-current-buffer-dependency-graph has the default binding C-c C-s M-t.

Full Validation

• Command sdml-mode-validate-current-buffer has the default binding C-c C-s v.
• Command sdml-mode-validate-file has the default binding C-c C-s M-v.
• The variable sdml-mode-validation-level denotes the level of messages produced by the validator, with a default of warnings.
• The output uses the standard compilation-mode with all the common bindings are available.

Abbreviations and Skeletons

This package creates a new abbrev-table, named sdml-mode-abbrev-table, which provides a number of useful skeletons for the following. abbrev-mode is enabled by sdml-mode and when typing one of the abbreviations below type space to expand.

Typing d t SPC will prompt for a name and expand into the SDML declaration datatype MyName ← opaque _ where the underscore character represents the new cursor position.

Declarations: mo=module, dt=datatype, en=enum, ev=event, pr=property, st=structure, un=union

Annotation Properties: pal=skos:altLabel, pdf=skos:definition, ped=skos:editorialNote, ppl=skos:prefLabel, pco=rdfs:comment

Constraints: ci=informal, cf=formal, all=universal, any=existential

Datatypes: db=boolean, dd=decimal, df=double, dh=binary, di=integer, sd=string, du=unsigned

Note that for annotation properties with language string values the skeletons will add the value of the Emacs variable locale-language as the language tag.

Prettify Symbol

The variable sdml-mode-prettify-symbols-alist specifies a set of symbols that may visually replace certain keywords or multi-character symbols in SDML source. For example the characters "->" may be replaced by the Unicode character → or the keyword "forall" replaced with the Unicode ∀.

Default Key Bindings

• C-c C-s d -- open the tree-sitter debug view
• C-c C-s q -- open the tree-sitter query builder
• C-c C-s t -- open a dependency tree view for the current buffer
• C-c C-s M-t -- open a dependency graph image for the current buffer
• C-c C-s v -- run the validator, on the current buffer, and show the results in a compilation window
• C-c C-s M-v -- run the validator, on a specified file, and show the results in a compilation window
• C-c C-s g -- run u-ctags for the current project

Add-Ons

• emacs-sdml-fold provides code-folding support to collapse and expand definitions.
• emacs-sdml-ispell provides selective spell checking by only checking selected nodes in the tree.
• emacs-flycheck-sdml provides on-the-fly linting for SDML buffers.
• emacs-ob-sdml provides the ability to call the SDML command-line tool to produce diagrams and more.

Contributing

This package includes an Eldev file and the following MUST be run before creating any PR.

• eldev lint
• eldev doctor
• eldev package --load-before-compiling --stop-on-failure --warnings-as-errors
• eldev test
• eldev test --undercover auto,coveralls,merge,dontsent -U simplecov.json
• eldev release -nU 9.9.9

The script eldev-check.sh may be useful to you if you do not have your own Eldev workflow.

License

This package is released under the Apache License, Version 2.0. See the LICENSE file in the repository for details.

Changes

Version 0.2.1

• Feature: update the grammar support for the underlying 0.4.8 release of tree-sitter-sdml.

Version 0.2.0

• Feature: update the grammar support for the underlying 0.4.0 release of tree-sitter-sdml.

Version 0.1.9

• Feature: added new sdml-mode-ctags-mode minor mode that provides a command to generate tag files using Universal Ctags.
• Feature: added a refresh command, bound to g, to the dependency tree view.
• Refactor: module sdml-mode-cli now more generic for other clients.
• Build: reworked the Eldev workflow for Github actions.
• Fix: regex for compilation mode, error tracking in validation command now working correctly.
• Fix: added guard to commands to be relevant only in sdml-mode.
• Fix: removed property_def rule from highlighting.

Version 0.1.8

• Feature: update to latest tree-sitter grammar (0.3.2).
• Feature: no setup functions required, just use-package or require.
• Feature: highlighting and indentation implemented as minor modes.
• Feature: now available on melpa.

Versions 0.1.0 - 0.1.7

These versions are all pre-release and do not appear in ELPA/MELPA.