Added get-dependencies option to install_pack.py

Author: jk464

CHANGELOG.rst

@@ -28,6 +28,7 @@ Added
 * Expose environment variable ST2_ACTION_DEBUG to all StackStorm actions.
   Contributed by @maxfactor1
 
+* Added get-dependencies option to install_pack.py #5994
 
 3.8.0 - November 18, 2022
 -------------------------

st2common/st2common/cmd/install_pack.py

@@ -14,16 +14,19 @@
 # limitations under the License.
 
 import sys
+from os import listdir
 
 from oslo_config import cfg
 
 from st2common import config
 from st2common import log as logging
 from st2common.config import do_register_cli_opts
 from st2common.script_setup import setup as common_setup
+from st2common.util.pack import get_pack_metadata
 from st2common.util.pack_management import download_pack
 from st2common.util.pack_management import get_and_set_proxy_config
 from st2common.util.virtualenvs import setup_pack_virtualenv
+from st2common.content.utils import get_pack_base_path, get_packs_base_paths
 
 __all__ = ["main"]
 
@@ -53,10 +56,77 @@ def _register_cli_opts():
             help="True to force pack installation and ignore install "
             "lock file if it exists.",
         ),
+        cfg.BoolOpt(
+            "get-dependencies",
+            default=False,
+            help="True to install pack dependencies",
+        ),
     ]
     do_register_cli_opts(cli_opts)
 
 
+def get_pack_dependencies(pack, verify_ssl, force, dependencies, proxy_config):
+    pack_path = get_pack_base_path(pack)
+
+    try:
+        pack_metadata = get_pack_metadata(pack_dir=pack_path)
+        result = pack_metadata.get("dependencies", None)
+        if result:
+            LOG.info('Getting pack dependencies for pack "%s"' % (pack))
+            download_packs(result, verify_ssl, force, dependencies, proxy_config)
+            LOG.info('Successfully got pack dependencies for pack "%s"' % (pack))
+    except IOError:
+        LOG.error("Could not open pack.yaml at location %s" % pack_path)
+        result = None
+
+
+def download_packs(packs, verify_ssl, force, dependencies, proxy_config):
+    packs_base_paths = get_packs_base_paths()
+
+    for pack in packs:
+        for pack_dir in packs_base_paths:
+            if pack in listdir(pack_dir):
+                LOG.info('Pack (%s) already installed in "%s"' % (pack, pack_dir))
+                break
+        else:
+            # 1. Download the pack
+            LOG.info('Installing pack "%s"' % (pack))
+            result = download_pack(
+                pack=pack,
+                verify_ssl=verify_ssl,
+                force=force,
+                proxy_config=proxy_config,
+                force_permissions=True,
+            )
+
+            # Raw pack name excluding the version
+            pack_name = result[1]
+            success = result[2][0]
+
+            if success:
+                LOG.info('Successfully installed pack "%s"' % (pack_name))
+            else:
+                error = result[2][1]
+                LOG.error('Failed to install pack "%s": %s' % (pack_name, error))
+                sys.exit(2)
+
+            # 2. Setup pack virtual environment
+            LOG.info('Setting up virtualenv for pack "%s"' % (pack_name))
+            setup_pack_virtualenv(
+                pack_name=pack_name,
+                update=False,
+                logger=LOG,
+                proxy_config=proxy_config,
+                no_download=True,
+            )
+            LOG.info('Successfully set up virtualenv for pack "%s"' % (pack_name))
+
+            if dependencies:
+                get_pack_dependencies(
+                    pack_name, verify_ssl, force, dependencies, proxy_config
+                )
+
+
 def main(argv):
     _register_cli_opts()
 
@@ -71,40 +141,10 @@ def main(argv):
     packs = cfg.CONF.pack
     verify_ssl = cfg.CONF.verify_ssl
     force = cfg.CONF.force
+    dependencies = cfg.CONF.get_dependencies
 
     proxy_config = get_and_set_proxy_config()
 
-    for pack in packs:
-        # 1. Download the pack
-        LOG.info('Installing pack "%s"' % (pack))
-        result = download_pack(
-            pack=pack,
-            verify_ssl=verify_ssl,
-            force=force,
-            proxy_config=proxy_config,
-            force_permissions=True,
-        )
-
-        # Raw pack name excluding the version
-        pack_name = result[1]
-        success = result[2][0]
-
-        if success:
-            LOG.info('Successfully installed pack "%s"' % (pack_name))
-        else:
-            error = result[2][1]
-            LOG.error('Failed to install pack "%s": %s' % (pack_name, error))
-            sys.exit(2)
-
-        # 2. Setup pack virtual environment
-        LOG.info('Setting up virtualenv for pack "%s"' % (pack_name))
-        setup_pack_virtualenv(
-            pack_name=pack_name,
-            update=False,
-            logger=LOG,
-            proxy_config=proxy_config,
-            no_download=True,
-        )
-        LOG.info('Successfully set up virtualenv for pack "%s"' % (pack_name))
+    download_packs(packs, verify_ssl, force, dependencies, proxy_config)
 
     return 0