Git Subtrees

Tree-sitter parsers are sometimes packaged on npm, sometimes packaged on, and have different release frequencies. Difftastic uses git subtrees (not git submodules) to track parsers.

Updating a parser

To update a parser, pull commits from the upstream git repository. For example, the following command will update the Java parser:

$ git subtree pull --prefix=vendor/tree-sitter-java master

To see when each parser was last updated, use the following shell command:

$ for d in $(git log | grep git-subtree-dir | tr -d ' ' | cut -d ":" -f2 | sort); do echo "$d"; git log --pretty="  %cs" -n 1 $d; done