Aha: Improving the git-diff and git-node-history commands

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Edward K. Ream

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Jul 12, 2023, 12:00:37 PM7/12/23

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Leo's git-diff command provides a node-oriented diff. I use this command constantly.

In an earlier post, I mentioned a telltale signal that a node's gnx has changed: git-diff reports a pair of nodes, one added, the other deleted. The gnx definitely has changed if both nodes have the same contents. The gnx may have changed if the headlines are the same, but the bodies differ.

Aha! git-diff can detect this pattern! Doh! I should have thought of this before :-)

This Aha will improve git-diff slightly. The command will replace pairs of added/deleted nodes with a single node describing the changed gnxs.

Summary

The Aha is essential for git-node-history. This command must track nodes' history reliably, even when their gnxs change. The Aha shows how.