Load .env from home, git, cwd, cmd line arg

aider/main.py

@@ -220,9 +220,9 @@ def generate_search_path_list(default_fname, git_root, command_line_file):
     files.append(Path.home() / default_file)  # homedir
     if git_root:
         files.append(Path(git_root) / default_file)  # git root
+    files.append(default_file.resolve())
     if command_line_file:
         files.append(command_line_file)
-    files.append(default_file.resolve())
     files = [Path(fn).resolve() for fn in files]
     files.reverse()
     uniq = []
@@ -255,6 +255,20 @@ def register_models(git_root, model_settings_fname, io):
     return None
 
 
+def load_dotenv_files(git_root, dotenv_fname):
+    dotenv_files = generate_search_path_list(
+        ".env",
+        git_root,
+        dotenv_fname,
+    )
+    loaded = []
+    for fname in dotenv_files:
+        if Path(fname).exists():
+            loaded.append(fname)
+            load_dotenv(fname)
+    return loaded
+
+
 def register_litellm_models(git_root, model_metadata_fname, io):
     model_metatdata_files = generate_search_path_list(
         ".aider.model.metadata.json", git_root, model_metadata_fname
@@ -294,8 +308,7 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
     args, unknown = parser.parse_known_args(argv)
 
     # Load the .env file specified in the arguments
-    if hasattr(args, "env_file"):
-        load_dotenv(args.env_file)
+    loaded_dotenvs = load_dotenv_files(git_root, args.env_file)
 
     # Parse again to include any arguments that might have been defined in .env
     args = parser.parse_args(argv)
@@ -342,6 +355,9 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
         editingmode=editing_mode,
     )
 
+    for fname in loaded_dotenvs:
+        io.tool_output(f"Loaded {fname}")
+
     fnames = [str(Path(fn).resolve()) for fn in args.files]
     if len(args.files) > 1:
         good = True

aider/website/_includes/special-keys.md

@@ -6,4 +6,4 @@ have their keys and settings
 specified in environment variables.
 This can be done in your shell, 
 or by using a 
-[`.env` file](/docs/config/dotenv.html).
+[.env file](/docs/config/dotenv.html).

aider/website/docs/config/aider_conf.md

@@ -12,12 +12,12 @@ your git repo.
 
 {% include special-keys.md %}
 
-Below is a sample of the file, which you
+{% include env-keys-tip.md %}
+
+Below is a sample of the YAML config file, which you
 can also
 [download from GitHub](https://github.com/paul-gauthier/aider/blob/main/aider/website/assets/sample.aider.conf.yml).
 
-{% include env-keys-tip.md %}
-
 <!--[[[cog
 from aider.args import get_sample_yaml
 from pathlib import Path

aider/website/docs/config/dotenv.md

@@ -13,9 +13,14 @@ in the `.env` file.
 
 {% include special-keys.md %}
 
-Aider will look for a `.env` file in the
-root of your git repo or in the current directory.
-You can give it an explicit file to load with the `--env-file <filename>` parameter.
+Aider will look for a `.env` file in these locations:
+
+- Your home directory.
+- The root of your git repo.
+- The current directory.
+- As specified with the `--env-file <filename>` parameter.
+
+If the files above exist, they will be loaded in that order. Files loaded last will take priority.
 
 Below is a sample `.env` file, which you
 can also

aider/website/docs/install/optional.md

@@ -14,7 +14,7 @@ The steps below are completely optional.
 
 ## Store your api keys 
 
-You can place your [api keys in a `.env` file](/docs/config/dotenv.html)
+You can [store your api keys in a .env file](/docs/config/dotenv.html)
 and they will be loaded automatically whenever you run aider.
 
 ## Enable Playwright