ci: add testing & shellcheck workflows (#159)

.github/scripts/test.bash

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+#
+# Usage:
+# ./test.bash catpuccin-tmux/catpuccin-tmux.tmux
+# ./test.bash catpuccin-tmux/catpuccin-tmux.tmux ./config-example1
+#
+
+SOCKET_NAME="${SOCKET_NAME:-test}"
+
+tmux() {
+  command tmux -L "$SOCKET_NAME" "$@"
+}
+
+start_tmux_server() {
+  echo "Starting tmux server" >&2
+  tmux new -s dummy -d
+}
+
+kill_tmux_server() {
+  echo "Stopping tmux server" >&2
+  tmux kill-server
+}
+
+check() {
+  local out exit_code
+  exit_code="$1"
+  out="$2"
+
+  if [ "$exit_code" -ne 0 ] || [ -n "$out" ]; then
+    echo "Failed with exit code $exit_code and output:"
+    echo "$out"
+    exit 1
+  fi
+
+}
+
+main() {
+  local config_file plugin output exit_code
+
+  plugin="$1"
+  config_file="$2"
+
+  echo "Using socket '$SOCKET_NAME'" >&2
+
+  # Make sure its a new/clean server
+  kill_tmux_server 2>/dev/null
+  start_tmux_server
+
+  if [ -z "$config_file" ]; then
+    echo "No config file provided" >&2
+  else
+    echo "sourcing config file '$config_file'" >&2
+    tmux source-file "$config_file"
+  fi
+
+  if [ -z "$plugin" ]; then
+    echo "ERROR: No path to the plugin provided" >&2
+    exit 1
+  else
+    echo "Running plugin: $plugin" >&2
+    output=$(tmux run-shell "$plugin" 2>&2)
+    exit_code="$?"
+
+    check "$exit_code" "$output"
+  fi
+
+  kill_tmux_server
+}
+
+main "$@"