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Simplify gardener Slack notifications to linked titles #8540

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Simplify gardener Slack notifications to linked titles #8540

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51 changes: 5 additions & 46 deletions .github/workflows/gardener-notify-slack.yml
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
name: Gardener - Notify Slack
# Runs after `Gardener - Notify Event` completes. Posts a summary to Slack,
# Runs after `Gardener - Notify Event` completes. Posts a linked title to Slack,
# and for Dependabot-opened PRs also applies the `devtools-gardener` label
# (so Dependabot PRs show up in the gardener flow without a human having
# to label them).
Expand Down Expand Up @@ -61,57 +61,16 @@ jobs:
SLACK_BOT_TOKEN: ${{ secrets.SLACK_GARDENER_BOT_TOKEN }}
SLACK_CHANNEL_ID: ${{ vars.GARDENER_SLACK_CHANNEL_ID }}
run: |
KIND=$(jq -r 'if has("pull_request") then "PR" else "Issue" end' event.json)
# Pull the body out, truncate, then convert GitHub Markdown to
# Slack mrkdwn. Links and fenced code blocks are stashed before
# the HTML-escape pass so their contents survive verbatim (a `&`
# inside a URL must stay raw, and code content shouldn't be
# mangled). Blockquote `> ` markers are also stashed so the
# `>` → `>` escape doesn't break them. Everything else is
# HTML-escaped so user-supplied `<`, `>`, `&` can't collide
# with Slack link syntax or injected mentions like <!channel>.
BODY=$(jq -r '(.issue // .pull_request).body // ""' event.json)
if [ ${#BODY} -gt 1000 ]; then
BODY="${BODY:0:1000}…"
fi
BODY=$(printf '%s' "$BODY" | perl -0777 -pe '
my @u;
s{\[([^\]]+)\]\(([^)]+)\)}{push @u, $2; "\x01$#u\x02$1\x03"}ge;
my @c;
s{^```[^\n]*\n(.*?)\n```$}{push @c, $1; "\x04$#c\x05"}gems;
s/^> /\x06/gm;
s/^#{1,6}\s+(.+)$/*$1*/gm;
s/\*\*(.+?)\*\*/*$1*/g;
s/^(\s*)- \[x\]\s+/$1✓ /gm;
s/^(\s*)[-*]\s+/$1• /gm;
s/&/&amp;/g;
s/</&lt;/g;
s/>/&gt;/g;
s/\x06/> /g;
s{\x01(\d+)\x02(.*?)\x03}{"<$u[$1]|$2>"}ge;
s{\x04(\d+)\x05}{"```\n$c[$1]\n```"}ge;
')
jq \
--arg channel "$SLACK_CHANNEL_ID" \
--arg kind "$KIND" \
--arg body "$BODY" \
'
def escape: gsub("&";"&amp;") | gsub("<";"&lt;") | gsub(">";"&gt;");

(.issue // .pull_request) as $i
| ([$i.labels[]?.name | select(. != "devtools-gardener")]
| map("`\(.)`") | join(" ")) as $labels
| (if $kind == "PR"
then " · \($i.changed_files) files, +\($i.additions)/-\($i.deletions)"
+ (if $i.draft then " · draft" else "" end)
else "" end) as $meta
| [ "*<\($i.html_url)|\($kind) #\($i.number)>* — \(($i.title | escape))",
"_opened by \($i.user.login)\($meta)_" ]
+ (if $body != "" then [$body] else [] end)
+ (if $labels != "" then [$labels] else [] end)
| join("\n") as $msg
| { channel: $channel, text: "\($kind) #\($i.number): \($i.title)",
blocks: [{ type: "section", text: { type: "mrkdwn", text: $msg } }] }
| { channel: $channel,
text: "<\($i.html_url)|\($i.title | escape)>",
unfurl_links: false,
unfurl_media: false }
' event.json | curl -sf -X POST \
-H "Authorization: Bearer $SLACK_BOT_TOKEN" \
-H 'Content-type: application/json; charset=utf-8' \
Expand Down
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