Remove old size labels

entrypoint.sh

@@ -9,6 +9,8 @@ fi
 
 export PR_SIZE_LABELER_HOME
 
+bash --version
+
 source "$PR_SIZE_LABELER_HOME/src/main.sh"
 
 main "$@"

src/github.sh

@@ -16,11 +16,26 @@ github::add_label_to_pr() {
   local -r pr_number=$1
   local -r label_to_add=$2
 
+  local -r body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$GITHUB_API_URI/repos/$GITHUB_REPOSITORY/pulls/$1")
+  local labels=$(echo "$body" | jq .labels | jq -r ".[] | .name" | grep -v "size/")
+  labels+=("$label_to_add")
+
+  local -r comma_separated_labels=$(github::format_labels "${labels[@]/#/}")
+
+  log::message "Final labels: $comma_separated_labels"
+
   curl -sSL \
     -H "Authorization: token $GITHUB_TOKEN" \
     -H "$GITHUB_API_HEADER" \
-    -X POST \
+    -X PATCH \
     -H "Content-Type: application/json" \
-    -d "{\"labels\":[\"$label_to_add\"]}" \
-    "$GITHUB_API_URI/repos/$GITHUB_REPOSITORY/issues/$pr_number/labels"
+    -d "{\"labels\":[$comma_separated_labels]}" \
+    "$GITHUB_API_URI/repos/$GITHUB_REPOSITORY/issues/$pr_number"
+}
+
+github::format_labels() {
+  local -r quoted_labels=$(echo "$@" | coll::map str::quote)
+  readarray -t splitted_quoted_labels <<<"$quoted_labels"
+
+  coll::join_by "," "${splitted_quoted_labels[@]/#/}"
 }

src/labeler.sh

@@ -6,7 +6,7 @@ labeler::label() {
   local -r pr_number=$(github_actions::get_pr_number)
   local -r total_modifications=$(github::calculate_total_modifications "$pr_number")
 
-  log::message "total modifications: $total_modifications"
+  log::message "Total modifications: $total_modifications"
 
   local -r label_to_add=$(labeler::label_for "$total_modifications" "$@")
 

src/misc.sh

@@ -1,9 +1,27 @@
 #!/usr/bin/env bash
 
 echoerr() {
-   echo "$@" 1>&2
+  echo "$@" 1>&2
 }
 
 log::message() {
   echo "$@"
 }
+
+coll::join_by() {
+  local IFS="$1"
+  shift
+  echo "$*"
+}
+
+coll::map() {
+  local -r fn="$1"
+
+  for x in $(cat); do
+    "$fn" "$x"
+  done
+}
+
+str::quote() {
+  echo "\"$1\""
+}