Editor support

Syntax highlighting, folding, indentation and CSS highlighting inside css { … } blocks come from tree-sitter-pdg.

Neovim

With lazy.nvim and nvim-treesitter:

{ "predictygraph/tree-sitter-pdg", dependencies = { "nvim-treesitter/nvim-treesitter" } }

Then run :TSInstall pdg. *.pdg files get the pdg filetype automatically.

Helix

[[language]]
name = "pdg"
scope = "source.pdg"
file-types = ["pdg"]
comment-token = "#"

[[grammar]]
name = "pdg"
source = { git = "https://github.com/predictygraph/tree-sitter-pdg", rev = "master" }

Run hx --grammar fetch && hx --grammar build, then copy queries/pdg/ from the grammar repo to ~/.config/helix/runtime/queries/pdg/.

Others

Zed, Emacs (treesit) and any other tree-sitter host can load the grammar and the queries in queries/pdg/.