[Backport] Allow missing profiles.yml for dbt deps and dbt init

.changes/unreleased/Fixes-20230508-072929.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Allow missing `profiles.yml` for `dbt deps` and `dbt init`
+time: 2023-05-08T07:29:29.873793-06:00
+custom:
+  Author: dbeatty10
+  Issue: "7511"

core/dbt/cli/main.py

@@ -421,7 +421,7 @@ def debug(ctx, **kwargs):
 @cli.command("deps")
 @click.pass_context
 @p.profile
-@p.profiles_dir
+@p.profiles_dir_exists_false
 @p.project_dir
 @p.target
 @p.vars
@@ -443,7 +443,7 @@ def deps(ctx, **kwargs):
 # for backwards compatibility, accept 'project_name' as an optional positional argument
 @click.argument("project_name", required=False)
 @p.profile
-@p.profiles_dir
+@p.profiles_dir_exists_false
 @p.project_dir
 @p.skip_profile_setup
 @p.target

core/dbt/cli/params.py

@@ -293,6 +293,8 @@
 )
 
 # `dbt debug` uses this because it implements custom behaviour for non-existent profiles.yml directories
+# `dbt deps` does not load a profile at all
+# `dbt init` will write profiles.yml if it doesn't yet exist
 profiles_dir_exists_false = click.option(
     "--profiles-dir",
     envvar="DBT_PROFILES_DIR",

tests/functional/profiles/test_profile_dir.py

@@ -9,6 +9,7 @@
 import dbt.flags as flags
 
 from dbt.tests.util import (
+    run_dbt,
     run_dbt_and_capture,
     write_file,
     rm_file,
@@ -89,6 +90,15 @@ def environ(env):
                 os.environ[key] = value
 
 
+class TestProfilesMayNotExist:
+    def test_debug(self, project):
+        # The database will not be able to connect; expect neither a pass or a failure (but not an exception)
+        run_dbt(["debug", "--profiles-dir", "does_not_exist"], expect_pass=None)
+
+    def test_deps(self, project):
+        run_dbt(["deps", "--profiles-dir", "does_not_exist"])
+
+
 class TestProfiles:
     def dbt_debug(self, project_dir_cli_arg=None, profiles_dir_cli_arg=None):
         # begin with no command-line args or user config (from profiles.yml)