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depot: make version build faster

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We don't need the entire depot to get the build version.
This commit is contained in:
Luke Granger-Brown 2021-03-28 01:14:59 +00:00
parent b2e2f965c5
commit ea927a8c34
1 changed files with 14 additions and 1 deletions
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15
version.nix
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@ -5,7 +5,20 @@
{ pkgs, ... }:
let
hgRepo = builtins.path { path = ./.hg; name = "depot-hg"; };
inherit (pkgs) lib;
inherit (builtins) elemAt match length;
hgRelativePath = path: elemAt (match ".*/\\.hg/(.*)$" path) 0;
hgDepth = path: length (lib.splitString "/" (hgRelativePath path));
hgRepo = builtins.path {
path = ./.hg;
name = "depot-hg";
filter = path: type: (type == "directory" && (
hgRelativePath path == "store" ||
hgRelativePath path == "merge" ||
hgRelativePath path == "cache")) ||
(type == "regular" && hgDepth path == 1) ||
(type == "regular" && hgDepth path == 2);
};
changesetDeriv = pkgs.runCommandLocal "depot-version" {
HG_REPO = hgRepo;
MERCURIAL = pkgs.mercurial;