go run wrapper to run a go program which is either in the current directory or in the cmd/<modulename> subdirectory

grn

#!/bin/bash

# check if main.go file exists
if [ -f "main.go" ]; then
  echo "go run ."
  go run .
  exit $?
fi

# check if go.mod file exists
if [ ! -f "go.mod" ]; then
  echo "go.mod file not found"
  exit 1
fi

# read the first line of the "go.mod" file
first_line=$(head -n 1 go.mod)

# check if the line is empty
if [[ -z "$first_line" ]]; then
  echo "module name not found"
  exit 1
fi

# split the first line by whitespace and extract the second element (assuming "module" is the first)
parts=($first_line)
if [[ ${#parts[@]} -lt 2 || "${parts[0]}" != "module" ]]; then
  echo "module name not found"
  exit 1
fi

# print the module name
module_name="${parts[1]}"
#echo "${module_name}"
last_path_element="${module_name##*/}"
#echo "${last_path_element}"

# check if cmd subdirectory exists
if [ ! -d "cmd" ]; then
  echo "cmd subdirectory not found"
  exit 1
fi

# check if cmd subdirectory exists
if [ ! -d "cmd/$last_path_element" ]; then
  echo "cmd/$last_path_element subdirectory not found"
  exit 1
fi

# run the command
cmd_name="$module_name/cmd/$last_path_element"
echo "go run $cmd_name"
go run $cmd_name