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engine: generate the Souffle program once and hash that file for the engine id (#1593) #1611

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Merged
swapnilpaliwal-sd merged 1 commit into from
Sep 28, 2026
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engine: generate the Souffle program once and hash that file for the engine id (#1593) #1611

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5 changes: 4 additions & 1 deletion .github/RELEASING.md
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Expand Up @@ -66,4 +66,7 @@ from Actions at any time (it publishes only if you tick `publish`).

Compiled engines are cached by ENGINE_ID, the hash of a language's rules and the Soufflé version,
so a change that touches no rules reuses every engine and a rule change recompiles only its own
language. The nightly and every real publish build fresh.
language. Precisely: sha256 over the pinned Soufflé version, the bytes of the program file that is
compiled, and every file it includes, in include order. The program is generated once, verified and
then hashed, so the id is path-independent (the same from any checkout) and rule-sensitive (any rule,
map or manifest change moves it), and it never comes from a second rendering of the program (#1593). The nightly and every real publish build fresh.
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