activate multiple profiles (#45)

* add activation of multiple profiles

docs/configuration.md

@@ -97,6 +97,11 @@ As an example, if we define `SELVA_PROFILE=dev`, the file `settings_dev.yaml` wi
 be loaded. If instead we define `SELVA_PROFILE=prod`, then the file `settings_prod.yaml`
 will be loaded.
 
+Multiple profiles can be activated by setting `SELVA_PROFILE` with a comma separated
+list of profiles, for example `SELVA_PROFILE=dev,prod`. The framework will iterate
+over the list and merge the settings found on each one. The precedence is from last
+to first, so settings from one profile overwrite settings from the previous ones.
+
 ## Environment variables
 
 Settings can also be defined with environment variables whose names start with `SELVA__`,

src/selva/configuration/settings.py

@@ -92,9 +92,10 @@ def _get_settings_nocache() -> Settings:
     # merge with main settings file (settings.yaml)
     merge_recursive(settings, get_settings_for_profile())
 
-    # merge with environment settings file (settings_$SELVA_PROFILE.yaml)
-    if active_profile := os.getenv(SELVA_PROFILE):
-        merge_recursive(settings, get_settings_for_profile(active_profile))
+    # merge with profile settings files (settings_$SELVA_PROFILE.yaml)
+    if active_profile_list := os.getenv(SELVA_PROFILE):
+        for active_profile in (p.strip() for p in active_profile_list.split(",")):
+            merge_recursive(settings, get_settings_for_profile(active_profile))
 
     # merge with environment variables (SELVA_*)
     from_env_vars = parse_settings_from_env(os.environ)

tests/configuration/alternate/configuration/application_prd.yaml

@@ -1 +1 @@
-environment: prd
+profile: prd

tests/configuration/multiple_profiles/configuration/settings_dev.yaml

@@ -0,0 +1 @@
+profile_dev: true

tests/configuration/multiple_profiles/configuration/settings_prd.yaml

@@ -0,0 +1 @@
+profile_prd: true

tests/configuration/multiple_profiles/configuration/settings_stg.yaml

@@ -0,0 +1 @@
+profile_stg: true

tests/configuration/profiles/configuration/settings_dev.yaml

@@ -1 +1 @@
-environment: dev
+profile: dev

tests/configuration/profiles/configuration/settings_prd.yaml

@@ -1 +1 @@
-environment: prd
+profile: prd

tests/configuration/profiles/configuration/settings_stg.yaml

@@ -1 +1 @@
-environment: stg
+profile: stg

tests/configuration/test_settings.py

@@ -41,17 +41,32 @@ def test_get_settings_with_profile(monkeypatch, profile):
     result = _get_settings_nocache()
     assert result == default_settings | {
         "name": "application",
-        "environment": profile,
+        "profile": profile,
+    }
+
+
+@pytest.mark.parametrize(
+    ["profile_a", "profile_b"],
+    [["dev", "stg"], ["stg", "prd"], ["prd", "dev"]],
+)
+def test_get_settings_with_multiple_profiles(monkeypatch, profile_a, profile_b):
+    monkeypatch.chdir(Path(__file__).parent / "multiple_profiles")
+    monkeypatch.setenv("SELVA_PROFILE", f"{profile_a}, {profile_b}")
+
+    result = _get_settings_nocache()
+    assert result == default_settings | {
+        f"profile_{profile_a}": True,
+        f"profile_{profile_b}": True,
     }
 
 
 @pytest.mark.parametrize(
     "profile,expected",
     [
         (None, {"name": "application"}),
-        ("dev", {"environment": "dev"}),
-        ("stg", {"environment": "stg"}),
-        ("prd", {"environment": "prd"}),
+        ("dev", {"profile": "dev"}),
+        ("stg", {"profile": "stg"}),
+        ("prd", {"profile": "prd"}),
     ],
     ids=["None", "dev", "stg", "prd"],
 )
@@ -145,7 +160,7 @@ def test_configure_settings_file_with_profile(monkeypatch):
 
     result = _get_settings_nocache()
     assert result == default_settings | {
-        "environment": "prd",
+        "profile": "prd",
         "prop": "value",
         "list": ["1", "2", "3"],
         "dict": {
@@ -170,7 +185,7 @@ def test_configure_env_setttings(monkeypatch, env):
     result = _get_settings_nocache()
     assert result == default_settings | {
         "name": "application",
-        "environment": env,
+        "profile": env,
     }
 
 
@@ -213,7 +228,7 @@ def test_setttings_class_env(monkeypatch, env):
 
     settings = _get_settings_nocache()
     assert settings["name"] == "application"
-    assert settings["environment"] == env
+    assert settings["profile"] == env
 
 
 def test_no_profile_settings_file_should_log_warning(monkeypatch, caplog):