pyrox.dev
maintainers/scripts: add get-maintainer-pings-between.sh
Sometimes it is useful to see which maintainers your change will ping,
to know who you are going to spam in advance.
authored by
Morgan Jones
and committed by
Tristan Ross
0173b120
e5306ea0
+11
maintainers/scripts/README.md
+11
maintainers/scripts/README.md
···
57
58
[`maintainer-list.nix`]: ../maintainer-list.nix
59
60
+
### `get-maintainer-pings-between.sh`
61
+
62
+
Gets which maintainers would be pinged between two Nixpkgs revisions.
63
+
Outputs a JSON object on stdout mapping GitHub usernames to the attributes
64
+
that they would be getting pinged for.
65
+
66
+
Example:
67
+
68
+
```sh
69
+
maintainers/scripts/get-maintainer-pings-between.sh HEAD^ HEAD
70
+
```
71
72
## Conventions
73
+78
maintainers/scripts/get-maintainer-pings-between.sh
+78
maintainers/scripts/get-maintainer-pings-between.sh
···
···
1
+
#!/usr/bin/env nix-shell
2
+
#!nix-shell -i bash -p git jq
3
+
4
+
# Outputs a list of maintainers that would be pinged across two nixpkgs revisions.
5
+
# Authors:
6
+
# Morgan Jones (@numinit)
7
+
# Tristan Ross (@RossComputerGuy)
8
+
9
+
set -euo pipefail
10
+
11
+
if [ $# -lt 2 ]; then
12
+
echo "Usage: $0 <rev-from> <rev-to>" >&2
13
+
exit 1
14
+
fi
15
+
16
+
repo="$(git rev-parse --show-toplevel)"
17
+
system="$(nix-instantiate --eval --expr builtins.currentSystem)"
18
+
rev1="$(git -C "$repo" rev-parse "$1")"
19
+
rev2="$(git -C "$repo" rev-parse "$2")"
20
+
21
+
echo "Touched files:" >&2
22
+
git -C "$repo" diff --name-only "$rev1" "$rev2" \
23
+
| jq --raw-input --slurp 'split("\n")[:-1]' | tee "$TMPDIR/touched-files.json" >&2
24
+
25
+
# Runs an eval in the given worktree, outputting the path to $TMPDIR/$1.path.
26
+
# $1: The revision SHA.
27
+
eval_in_worktree() (
28
+
mkdir -p .worktree
29
+
local rev="$1"
30
+
local tree=".worktree/$rev"
31
+
if [ ! -d "$tree" ]; then
32
+
git -C "$repo" worktree add -f -d "$tree" "$rev" >&2
33
+
fi
34
+
cd "$tree"
35
+
36
+
local workdir="$TMPDIR/$rev"
37
+
rm -rf "$workdir"
38
+
mkdir -p "$workdir"
39
+
40
+
nix-build ci -A eval.attrpathsSuperset -o "$workdir/paths" >&2
41
+
mkdir -p "$workdir/intermediates"
42
+
nix-build ci -A eval.singleSystem \
43
+
--arg evalSystem "$system" \
44
+
--arg attrpathFile "$workdir/paths/paths.json" \
45
+
--arg chunkSize ${CHUNK_SIZE:-10000} \
46
+
-o "$workdir/intermediates/.intermediate-1" >&2
47
+
48
+
# eval.combine nix-build needs a directory, not a symlink
49
+
cp -RL "$workdir/intermediates/.intermediate-1" "$workdir/intermediates/intermediate-1"
50
+
chmod -R +w "$workdir/intermediates/intermediate-1"
51
+
rm -rf "$workdir/intermediates/.intermediate-1"
52
+
53
+
nix-build ci -A eval.combine \
54
+
--arg resultsDir "$workdir/intermediates" \
55
+
-o "$workdir/result" >&2
56
+
)
57
+
58
+
eval_in_worktree "$rev1" &
59
+
pid1=$!
60
+
eval_in_worktree "$rev2" &
61
+
pid2=$!
62
+
63
+
wait $pid1
64
+
wait $pid2
65
+
66
+
path1="$TMPDIR/$rev1"
67
+
path2="$TMPDIR/$rev2"
68
+
69
+
# Use the repo this script was executed in to get accurate maintainer info
70
+
nix-build "$repo/ci" -A eval.compare \
71
+
--arg beforeResultDir "$path1/result" \
72
+
--arg afterResultDir "$path2/result" \
73
+
--arg touchedFilesJson "$TMPDIR/touched-files.json" \
74
+
--arg byName true \
75
+
-o comparison
76
+
77
+
echo "Pinged maintainers (check $repo/comparison for more details)" >&2
78
+
jq < comparison/maintainers.json