Expand user home on galaxy install src

Fix bug where ansible-galaxy install would fail when given
paths starting with tilde (user home).

Related: ansible/galaxy#2030

changelogs/fragments/70942_galaxy_install.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - galaxy - expand ``~`` (user home) from role src (https://github.com/ansible/ansible/pull/70942/).

docs/docsite/rst/galaxy/user_guide.rst

@@ -272,6 +272,9 @@ Use the following example as a guide for specifying roles in *requirements.yml*:
 
     # from locally cloned git repository (file:// requires full paths)
     - src: file:///home/bennojoy/nginx
+    
+    # from locally cloned repository
+    - name: ~/src/bennojoy/nginx
 
     # from GitHub
     - src: https://github.com/bennojoy/nginx

lib/ansible/galaxy/role.py

@@ -38,6 +38,7 @@
 from ansible.module_utils.urls import open_url
 from ansible.playbook.role.requirement import RoleRequirement
 from ansible.utils.display import Display
+from ansible.utils.path import unfrackpath
 
 display = Display()
 
@@ -64,7 +65,7 @@ def __init__(self, galaxy, api, name, src=None, version=None, scm=None, path=Non
 
         self.name = name
         self.version = version
-        self.src = src or name
+        self.src = unfrackpath(src or name)
         self.scm = scm
         self.paths = [os.path.join(x, self.name) for x in galaxy.roles_paths]