blob: e08dde353e891aa2553c6670b27b3ef1b89b9f6e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
{ pkgs }:
rec {
/* Prepare a derivation for local builds.
*
* This function prepares checkpoint builds by provinding,
* containing the build output and the sources for cross checking.
* The build output can be used later to allow checkpoint builds
* by passing the derivation output to the `mkCheckpointBuild` function.
*
* To build a project with checkpoints follow these steps:
* - run prepareIncrementalBuild on the desired derivation
* e.G `incrementalBuildArtifacts = (pkgs.checkpointBuildTools.prepareCheckpointBuild pkgs.virtualbox);`
* - change something you want in the sources of the package( e.G using source override)
* changedVBox = pkgs.virtuabox.overrideAttrs (old: {
* src = path/to/vbox/sources;
* }
* - use `mkCheckpointedBuild changedVBox buildOutput`
* - enjoy shorter build times
*/
prepareCheckpointBuild = drv: drv.overrideAttrs (old: {
outputs = [ "out" ];
name = drv.name + "-checkpointArtifacts";
# To determine differences between the state of the build directory
# from an earlier build and a later one we store the state of the build
# directory before build, but after patch phases.
# This way, the same derivation can be used multiple times and only changes are detected.
# Additionally Removed files are handled correctly in later builds.
preBuild = (old.preBuild or "") + ''
mkdir -p $out/sources
cp -r ./* $out/sources/
'';
# After the build the build directory is copied again
# to get the output files.
# We copy the complete build folder, to take care for
# Build tools, building in the source directory, instead of
# having a build root directory, e.G the Linux kernel.
installPhase = ''
runHook preCheckpointInstall
mkdir -p $out/outputs
cp -r ./* $out/outputs/
runHook postCheckpointInstall
'';
});
/* Build a derivation based on the checkpoint output generated by
* the `prepareCheckpointBuild function.
*
* Usage:
* let
* checkpointArtifacts = prepareCheckpointBuild drv
* in mkCheckpointedBuild drv checkpointArtifacts
*/
mkCheckpointedBuild = drv: previousBuildArtifacts: drv.overrideAttrs (old: {
# The actual checkpoint build phase.
# We compare the changed sources from a previous build with the current and create a patch
# Afterwards we clean the build directory to copy the previous output files (Including the sources)
# The source difference patch is applied to get the latest changes again to allow short build times.
preBuild = (old.preBuild or "") + ''
set +e
diff -ur ${previousBuildArtifacts}/sources ./ > sourceDifference.patch
set -e
shopt -s extglob dotglob
rm -r !("sourceDifference.patch")
${pkgs.rsync}/bin/rsync -cutU --chown=$USER:$USER --chmod=+w -r ${previousBuildArtifacts}/outputs/* .
patch -p 1 -i sourceDifference.patch
'';
});
}
|