ci: Install missing lint packages

Also merge script into ci/lint_run_all.sh because env vars weren't
exported properly

.cirrus.yml

@@ -70,14 +70,8 @@ task:
     memory: 1G
   # For faster CI feedback, immediately schedule the linters
   << : *CREDITS_TEMPLATE
-  setup_script:
-    - set -o errexit; source ./ci/test/00_setup_env.sh
-  install_script:
-    - set -o errexit; source ./ci/lint/04_install.sh
-  before_script:
-    - set -o errexit; source ./ci/lint/05_before_script.sh
   lint_script:
-    - set -o errexit; source ./ci/lint/06_script.sh
+    - ./ci/lint_run_all.sh
 
 task:
   name: 'ARM [unit tests, no functional tests] [buster]'

ci/lint/04_install.sh

@@ -6,7 +6,8 @@
 
 export LC_ALL=C
 
-${CI_RETRY_EXE} apt update && apt install -y clang-format-9 python3-pip curl git
+${CI_RETRY_EXE} apt-get update
+${CI_RETRY_EXE} apt-get install -y clang-format-9 python3-pip curl git gawk jq
 update-alternatives --install /usr/bin/clang-format      clang-format      $(which clang-format-9     ) 100
 update-alternatives --install /usr/bin/clang-format-diff clang-format-diff $(which clang-format-diff-9) 100
 

ci/lint_run_all.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+export LC_ALL=C.UTF-8
+
+set -o errexit; source ./ci/test/00_setup_env.sh
+set -o errexit; source ./ci/lint/04_install.sh
+set -o errexit; source ./ci/lint/05_before_script.sh
+set -o errexit; source ./ci/lint/06_script.sh