From 98bf595324169387e4da66ac113615c3b4ebcf2c Mon Sep 17 00:00:00 2001
From: Arthur Meyre <arthur.meyre@zama.ai>
Date: Wed, 22 Sep 2021 12:46:51 +0200
Subject: [PATCH] chore(build): get last completed run to check whether to
 rebuild docker

---
 .github/workflows/continuous-integration.yaml | 27 +++++++-
 script/actions_utils/get_latest_run.sh        | 61 +++++++++++++++++++
 2 files changed, 85 insertions(+), 3 deletions(-)
 create mode 100755 script/actions_utils/get_latest_run.sh

diff --git a/.github/workflows/continuous-integration.yaml b/.github/workflows/continuous-integration.yaml
index ee2253e26..dc84d3074 100644
--- a/.github/workflows/continuous-integration.yaml
+++ b/.github/workflows/continuous-integration.yaml
@@ -45,12 +45,33 @@ jobs:
 
     steps:
       - uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
+        with:
+          fetch-depth: 0
       - name: Get changed files
         if: ${{ (github.event_name == 'push' && !startsWith(github.ref, 'refs/tags/')) || github.event_name == 'pull_request' }}
-        uses: Ana06/get-changed-files@ea75ed777daf24d6e95f43957bd26b1eab20806c
         id: files
-        with:
-          format: 'space-delimited'
+        env:
+          IS_PR: ${{ github.event_name == 'pull_request' }}
+        run: |
+          CURRENT_SHA="${{ github.sha }}"
+          if [[ "${IS_PR}" == "true" ]]; then
+            BEFORE_SHA="${{ github.event.pull_request.base.sha }}"
+          else
+            BEFORE_SHA="$(./script/actions_utils/get_latest_run.sh \
+            --token ${{ secrets.BOT_TOKEN }} \
+            --org-repo ${{ github.repository }} \
+            --event-types 'push workflow_dispatch repository_dispatch')"
+          fi
+          ALL_CHANGED_FILES=$(git diff --name-only "${CURRENT_SHA}" "${BEFORE_SHA}")
+
+          echo "Before sha1 ${BEFORE_SHA}"
+          echo "Current sha1 ${CURRENT_SHA}"
+
+          echo "Changed files:"
+          echo "${ALL_CHANGED_FILES}"
+
+          echo "::set-output name=all::${ALL_CHANGED_FILES//$'\n'/ }"
+
       - name: Should rebuild docker check
         run: |
           set +e
diff --git a/script/actions_utils/get_latest_run.sh b/script/actions_utils/get_latest_run.sh
new file mode 100755
index 000000000..add01cd14
--- /dev/null
+++ b/script/actions_utils/get_latest_run.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+
+TOKEN=
+ORG_REPO=
+EVENTS_TO_CHECK=
+
+while [ -n "$1" ]
+do
+   case "$1" in
+        "--token" )
+            shift
+            TOKEN="$1"
+            ;;
+
+        "--org-repo" )
+            shift
+            ORG_REPO="$1"
+            ;;
+
+        "--event-types" )
+            shift
+            EVENTS_TO_CHECK="$1"
+            ;;
+
+        *)
+            echo "Unknown param : $1"
+            exit 1
+            ;;
+   esac
+   shift
+done
+
+# Store the workflows that come in jsons in a file per event type
+declare -a JSON_FILES_ARRAY=()
+for EVENT in $EVENTS_TO_CHECK; do
+  CURR_FILE="$(mktemp --suffix=.json)"
+  curl \
+  -X GET \
+  -H "Accept: application/vnd.github.v3+json" \
+  -H "Authorization: token ${TOKEN}" \
+  "https://api.github.com/repos/${ORG_REPO}/actions/runs?branch=main&event=${EVENT}&status=success" | \
+  jq -rc '.workflow_runs | sort_by(.updated_at)[-1]' > "${CURR_FILE}"
+  JSON_FILES_ARRAY+=("${CURR_FILE}")
+done
+
+# Put all the workflows in the same json and dump that
+CONCAT_FILE="$(mktemp --suffix=.json)"
+jq -sr '.' "${JSON_FILES_ARRAY[@]}" > "${CONCAT_FILE}"
+
+# Sort by updated_at, get the last and get the sha1 for this last one
+BEFORE_SHA=$(jq -rc 'sort_by(.updated_at)[-1].head_sha' "${CONCAT_FILE}")
+
+# Remove files
+rm "${CONCAT_FILE}"
+
+for FILE_TO_RM in "${JSON_FILES_ARRAY[@]}"; do
+  rm "${FILE_TO_RM}"
+done
+
+# Echo for the outside world
+echo "${BEFORE_SHA}"