[NOD-13] Notify failing builds in Telegram (#287)

* [NOD-13] Added notify_telegram to deploy.sh.

* [NOD-13] Made a test fail for testing.

* [NOD-13] Added some temporary logging.

* [NOD-13] Wrote a nice message for the bot to send.

* [NOD-13] Made the message nicer.

* [NOD-13] Made the message nicer still.

* [NOD-13] Added the build log as an attachment.

* [NOD-13] Actually added the build log as an attachment.

* [NOD-13] Added a delay to allow the build log to properly flush.

* [NOD-13] Disowned notify_telegram.

* [NOD-13] Disowning doesn't work. Using the "at" command instead.

* [NOD-13] Properly using the at command.

* [NOD-13] Actually properly using the at command.

* [NOD-13] Added a couple of prints to see whether the script is even being called.

* [NOD-13] More printouts...

* [NOD-13] Added a command to start atd if it stopped for some reason.

* [NOD-13] Added slashes in multiline echo command.

* [NOD-13] Added quotes where required and removed debug comments.

* [NOD-13] Revert "[NOD-13] Made a test fail for testing."

This reverts commit 9701e30e

* [NOD-13] Added some comments.

deploy.sh

@@ -7,18 +7,33 @@ export IMAGE_TAG=${IMAGE_TAG:-"latest"}
 # GIT_COMMIT is set by Jenkins
 export COMMIT=${COMMIT:-$GIT_COMMIT}
 
-AWS_DEFAULT_REGION=${AWS_DEFAULT_REGION:-eu-central-1}
-export AWS_DEFAULT_REGION
-AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query 'Account' --output=text)
-export AWS_ACCOUNT_ID
-ECR_SERVER=${ECR_SERVER:-"$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com"}
-export ECR_SERVER
+export AWS_DEFAULT_REGION=${AWS_DEFAULT_REGION:-eu-central-1}
+export AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query 'Account' --output=text)
+export ECR_SERVER=${ECR_SERVER:-"$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com"}
 
 CF_PARAM=TaskImage
 IMAGE_NAME=${ECR_SERVER}/${SERVICE_NAME}
 
+# Sends a Telegram notification with some details about the failure
+# All variables in this function are set by Jenkins
+notify_telegram() {
+  echo "./telegram.sh \
+    '${TELEGRAM_API_TOKEN}' \
+    '${TELEGRAM_CHAT_ID}' \
+    '${BUILD_URL}' \
+    '${ghprbActualCommitAuthor}' \
+    '${ghprbPullTitle}' \
+    '${ghprbPullLink}'" | at -m now + 1 minute
+}
+
 trap "exit 1" INT
-fatal() { echo "ERROR: $*" >&2; exit 1; }
+fatal() {
+  echo "ERROR: $*" >&2
+  notify_telegram
+
+  exit 1
+}
+
 measure_runtime() {
   START=$(date +%s)
   echo "--> $*" >&2

telegram.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+
+# This file is part of Continuous Integration.  When ran by
+# the CI agent, it sends a some details about the build failure
+# to a Telegram group.
+
+API_TOKEN="$1"
+CHAT_ID="$2"
+BUILD_URL="$3"
+PR_AUTHOR="$4"
+PR_TITLE="$5"
+PR_LINK="$6"
+
+# Start atd
+service atd start
+
+# Build the failure message
+MESSAGE="*${PR_AUTHOR}*:
+Build *FAILED* for pull request '${PR_TITLE}'
+[Github](${PR_LINK})        [Jenkins](${BUILD_URL}console)"
+
+# Send the failure message
+curl -s \
+  -X POST \
+  "https://api.telegram.org/bot${API_TOKEN}/sendMessage" \
+  -d chat_id="${CHAT_ID}" \
+  -d parse_mode=markdown \
+  -d disable_web_page_preview=true \
+  -d text="${MESSAGE}"
+
+# Retrieve the build log
+LOG=$(curl ${BUILD_URL}consoleText)
+
+# Send the build log
+printf "$LOG" | curl \
+  "https://api.telegram.org/bot${API_TOKEN}/sendDocument" \
+  -F chat_id="${CHAT_ID}" \
+  -F document="@-;filename=build.log"