specify in readme how to use a development database

.gitignore

@@ -1,4 +1,5 @@
 /target
-fake_old_config.yml
+/*.yml
 .env
-tiempo.sqlite3
+/*.sqlite3
+dev_config.toml

README.md

@@ -194,6 +194,19 @@ Run
 
 to see the options.
 
+### Development database
+
+When developing I prefer not to mess with my own database, so I use this `.env`
+file:
+
+    export TIMETRAP_CONFIG_FILE=/absolute/path/to/repo/dev_config.toml
+    PS1="$ "
+
+and when I want to test some commands against such config file I just source it:
+
+    source .env
+    cargo run -- in 'hola'
+
 ## Special Thanks
 
 To [timetrap](https://github.com/samg/timetrap) for existing. It is the tool I

src/config.rs

@@ -68,11 +68,17 @@ impl Config {
     pub fn read() -> Result<Config> {
         // first try from env variable TIMETRAP_CONFIG_FILE
         if let Ok(value) = env::var("TIMETRAP_CONFIG_FILE") {
-            if value.ends_with(".toml") {
-                return Self::read_from_toml(value);
+            return if value.ends_with(".toml") {
+                let config_path = PathBuf::from(&value);
+
+                if config_path.is_file() {
+                    Self::read_from_toml(value)
+                } else {
+                    Self::create_and_return_config(config_path.parent().unwrap(), &config_path)
+                }
             } else {
-                return Self::read_from_yaml(value);
-            }
+                Self::read_from_yaml(value)
+            };
         }
 
         // Next try from some known directories