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util/mercurial.lua @ 13135:3fd24e1945b0
mod_storage_internal: Lazy-load archive items while iterating
Very large list files previously ran into limits of the Lua parser, or
just caused Prosody to freeze while parsing.
Using the new index we can parse individual items one at a time. This
probably won't reduce overall CPU usage, probably the opposite, but it
will reduce the number of items in memory at once and allow collection
of items after we iterated past them.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Wed, 12 May 2021 01:25:44 +0200 |
parent | 10533:a6cc5b844d7b |
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local lfs = require"lfs"; local hg = { }; function hg.check_id(path) if lfs.attributes(path, 'mode') ~= "directory" then return nil, "not a directory"; end local hg_dirstate = io.open(path.."/.hg/dirstate"); local hgid, hgrepo if hg_dirstate then hgid = ("%02x%02x%02x%02x%02x%02x"):format(hg_dirstate:read(6):byte(1, 6)); hg_dirstate:close(); local hg_changelog = io.open(path.."/.hg/store/00changelog.i"); if hg_changelog then hg_changelog:seek("set", 0x20); hgrepo = ("%02x%02x%02x%02x%02x%02x"):format(hg_changelog:read(6):byte(1, 6)); hg_changelog:close(); end else local hg_archival,e = io.open(path.."/.hg_archival.txt"); -- luacheck: ignore 211/e if hg_archival then local repo = hg_archival:read("*l"); local node = hg_archival:read("*l"); hg_archival:close() hgid = node and node:match("^node: (%x%x%x%x%x%x%x%x%x%x%x%x)") hgrepo = repo and repo:match("^repo: (%x%x%x%x%x%x%x%x%x%x%x%x)") end end return hgid, hgrepo; end return hg;