From 3a8925239a690a97804cfe7196c6c23c32d7306f Mon Sep 17 00:00:00 2001
From: sterni <sternenseemann@systemli.org>
Date: Thu, 9 Sep 2021 00:20:31 +0200
Subject: refactor(web/bubblegum): only rebuild examples on dependency change

Using sparseTree we can make a (surprisingly long) list of things from
depot the examples depend on and create a stripped down depot version
which only contains them. As a result the examples are no longer rebuilt
on every commit.

Change-Id: I3693570ca4bdbbf9da795e552f278f3b1b1b77a9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3504
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
---
 web/bubblegum/default.nix | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'web/bubblegum')

diff --git a/web/bubblegum/default.nix b/web/bubblegum/default.nix
index ed4e48839b..0ad541390b 100644
--- a/web/bubblegum/default.nix
+++ b/web/bubblegum/default.nix
@@ -6,8 +6,27 @@ let
     runExecline
     getBins
     utils
+    sparseTree
     ;
 
+  minimalDepot = sparseTree depot.path [
+    # general depot things
+    (depot.path + "/default.nix")
+    (depot.path + "/nix/readTree")
+    # nixpkgs for lib and packages
+    (depot.path + "/third_party/nixpkgs")
+    (depot.path + "/third_party/overlays")
+    # bubblegum and its dependencies
+    (depot.path + "/web/bubblegum")
+    (depot.path + "/nix/runExecline")
+    (depot.path + "/nix/utils")
+    (depot.path + "/nix/sparseTree")
+    # tvix docs for svg demo
+    (depot.path + "/tvix/docs")
+    # for blog.nix
+    (depot.path + "/users/sterni/nix")
+  ];
+
   statusCodes = {
     # 1xx
     "Continue" = 100;
@@ -205,7 +224,7 @@ let
       ] ++ [
         "${bins.nint}"
         # always pass depot so scripts can use this library
-        "--arg depot '(import ${depot.path} {})'"
+        "--arg depot '(import ${minimalDepot} {})'"
       ]);
     in runExecline.local drvName {} [
       "importas" "out" "out"
-- 
cgit 1.4.1