[NO TESTS] WIP

Author: arrdem

py/private/link/BUILD.bazel

@@ -38,3 +38,45 @@ config_setting(
         ":venv_strategy": "dynamic",
     },
 )
+
+string_flag(
+    name = "linking_strategy",
+    build_setting_default = "per-package",
+    values = [
+        "per-package",
+        "workspace-root",
+        "workon-root",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+config_setting(
+    name = "link_to_package",
+    flag_values = {
+        ":linking_strategy": "per-package",
+    },
+)
+
+config_setting(
+    name = "link_to_workspace",
+    flag_values = {
+        ":linking_strategy": "workspace-root",
+    },
+)
+
+config_setting(
+    name = "link_to_workon",
+    flag_values = {
+        ":linking_strategy": "workspace-root",
+    },
+)
+
+string_flag(
+    name = "naming_strategy",
+    build_setting_default = "venv-name",
+    values = [
+        "venv-name", # Respect the virtualenv's name property
+        "dot-venv",  # Use .venv as the name of the link
+    ],
+
+)

py/private/link/defs.bzl

@@ -37,6 +37,13 @@ def py_link_venv(
     if venv_dest != None:
         args = ["--dest=" + venv_dest] + args
 
+    # Default configurable behavior
+    if not venv_name and not venv_dest:
+        args = select({
+            Label(":link_per_package"): ["--dest=$BUILD_WORKING_DIRECTORY/" + native.package(), "--name=.venv"] + args
+            "//conditions:default": args
+        })
+
     binary_rule(
         name = name,
         args = args,

py/private/link/link.py

@@ -45,7 +45,7 @@ def munge_venv_name(target_package, virtualenv_name):
     )
 
     opts = PARSER.parse_args()
-    dest = Path(os.path.join(opts.dest, opts.name))
+    dest = Path(os.path.join(os.path.expandvars(opts.dest), opts.name))
     print("""
 
 Linking: {venv_home} -> {venv_path}

py/settings/BUILD.bazel

@@ -9,12 +9,14 @@ alias(
     visibility = ["//visibility:public"],
 )
 
-string_flag(
-    name = "venv_strategy",
-    build_setting_default = "dynamic",
-    values = [
-        "dynamic",
-        "static",
-    ],
+alias(
+    name = "link_venv_strategy",
+    actual = "//py/private/link:venv_strategy",
+    visibility = ["//visibility:public"],
+)
+
+alias(
+    name = "linking_strategy",
+    actual = "//py/private/link:linking_strategy",
     visibility = ["//visibility:public"],
 )