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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
# This file configures the primary build pipeline used for the
# top-level list of depot targets.
#
# It outputs a "YAML" (actually JSON) file which is evaluated and
# submitted to Buildkite at the start of each build. This means we can
# dynamically configure the pipeline execution here.
{ depot, lib, pkgs, ... }:
let
inherit (builtins) concatStringsSep foldl' map toJSON;
inherit (pkgs) symlinkJoin writeText;
# Create an expression that builds the target at the specified
# location.
mkBuildExpr = target:
let
descend = expr: attr: "builtins.getAttr \"${attr}\" (${expr})";
targetExpr = foldl' descend "import ./. {}" target.__readTree;
subtargetExpr = descend targetExpr target.__subtarget;
in if target ? __subtarget then subtargetExpr else targetExpr;
# Create a pipeline label from the targets tree location.
mkLabel = target:
let label = concatStringsSep "/" target.__readTree;
in if target ? __subtarget
then "${label}:${target.__subtarget}"
else label;
# Create a pipeline step from a single target.
#
# If the build fails, Buildkite metadata is updated to mark the
# pipeline as failed. Buildkite has a concept of a failed pipeline
# regardless, but this data is not accessible.
mkStep = target: {
command = ''
nix-build -E '${mkBuildExpr target}' || (buildkite-agent meta-data set "failure" "1"; exit 1)
'';
label = ":nix: ${mkLabel target}";
};
# Protobuf check step which validates that changes to .proto files
# between revisions don't cause backwards-incompatible or otherwise
# flawed changes.
protoCheck = {
command = "${depot.nix.bufCheck}/bin/ci-buf-check";
label = ":water_buffalo:";
};
# This defines the build pipeline, using the pipeline format
# documented on https://buildkite.com/docs/pipelines/defining-steps
#
# Pipeline steps need to stay in order.
pipeline.steps =
# Zero the failure status
[
{
command = "buildkite-agent meta-data set 'failure' '0'";
label = ":buildkite:";
}
{ wait = null; }
]
# Create build steps for each CI target
++ (map mkStep depot.ci.targets)
++ [
# Simultaneously run protobuf checks
protoCheck
# Wait for all previous checks to complete
({
wait = null;
continue_on_failure = true;
})
# Wait for all steps to complete, then exit with success or
# failure depending on whether any failure status was written.
# This step must be :duck:! (yes, really!)
({
command = "exit $(buildkite-agent meta-data get 'failure')";
label = ":duck:";
key = ":duck:";
})
# After duck, on success, create a gcroot if the build branch is
# canon.
#
# We care that this anchors *most* of the depot, in practice
# it's unimportant if there is a build race and we get +-1 of
# the targets.
#
# Unfortunately this requires a third evaluation of the graph,
# but since it happens after :duck: it should not affect the
# timing of status reporting back to Gerrit.
({
command = "nix-instantiate -A ci.gcroot --add-root /nix/var/nix/gcroots/depot/canon";
label = ":anchor:";
"if" = ''build.branch == "canon"'';
depends_on = [{
step = ":duck:";
allow_failure = false;
}];
})
];
in (writeText "depot.yaml" (toJSON pipeline))
|
