From 8a0b1d2d9f9629e4a186549b134ebd6b80a5d71b Mon Sep 17 00:00:00 2001
From: David Luevano Alvarado <david@luevano.xyz>
Date: Sat, 23 Apr 2022 21:49:53 -0600
Subject: add proper var expansion from config file

---
 ChangeLog                  |  5 +++++
 src/pyssg/configuration.py | 12 +++++++++++-
 src/pyssg/pyssg.py         |  6 ++----
 src/pyssg/utils.py         | 21 +++++++++++++--------
 4 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index e480159..710831a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,11 @@
 CHANGES
 =======
 
+v0.7.0
+------
+
+* add checksum checking for mod files instead of timestamp
+
 v0.6.2
 ------
 
diff --git a/src/pyssg/configuration.py b/src/pyssg/configuration.py
index b193cf8..32a010b 100644
--- a/src/pyssg/configuration.py
+++ b/src/pyssg/configuration.py
@@ -5,6 +5,8 @@ from datetime import datetime, timezone
 from configparser import ConfigParser
 from logging import Logger, getLogger
 
+from .utils import get_expanded_path
+
 log: Logger = getLogger(__name__)
 
 
@@ -12,7 +14,15 @@ DEFAULT_CONFIG_PATH = '$XDG_CONFIG_HOME/pyssg/config.ini'
 VERSION = version('pyssg')
 
 
+def __expand_all_paths(config: ConfigParser) -> None:
+    log.debug('expanding all path options')
+    for option in config.options('path'):
+        path: str = config.get('path', option)
+        config.set('path', option, get_expanded_path(path))
+
+
 def __check_well_formed_config(config: ConfigParser) -> None:
+    log.debug('checking that config file is well formed')
     default_config: ConfigParser = ConfigParser()
     with rpath('pyssg.plt', 'default.ini') as p:
         log.debug('reading config file "%s"', p)
@@ -35,8 +45,8 @@ def get_parsed_config(path: str) -> ConfigParser:
     log.debug('reading config file "%s"', path)
     config.read(path)
 
-    log.debug('checking that config file is well formed')
     __check_well_formed_config(config)
+    __expand_all_paths(config)
 
     # set other required options
     log.debug('setting extra config options')
diff --git a/src/pyssg/pyssg.py b/src/pyssg/pyssg.py
index 598bf41..eb042b6 100644
--- a/src/pyssg/pyssg.py
+++ b/src/pyssg/pyssg.py
@@ -5,7 +5,7 @@ from typing import Union
 from configparser import ConfigParser
 from logging import Logger, getLogger, DEBUG
 
-from .utils import create_dir, copy_file, sanity_check_path
+from .utils import create_dir, copy_file, get_expanded_path
 from .arg_parser import get_parsed_arguments
 from .configuration import get_parsed_config, DEFAULT_CONFIG_PATH, VERSION
 from .database import Database
@@ -35,10 +35,8 @@ def main() -> None:
         log.info('pyssg v%s', VERSION)
         sys.exit(0)
 
-    log.debug('checking config file path')
     config_path: str = args['config'] if args['config'] else DEFAULT_CONFIG_PATH
-    config_path = os.path.normpath(os.path.expandvars(config_path))
-    sanity_check_path(config_path)
+    config_path = get_expanded_path(config_path)
     config_dir, _ = os.path.split(config_path)
     log.debug('checked config file path, final config path "%s"', config_path)
 
diff --git a/src/pyssg/utils.py b/src/pyssg/utils.py
index a41249a..4b525cf 100644
--- a/src/pyssg/utils.py
+++ b/src/pyssg/utils.py
@@ -74,13 +74,6 @@ def copy_file(src: str, dst: str) -> None:
         log.info('file "%s" already exists, ignoring', dst)
 
 
-def sanity_check_path(path: str) -> None:
-    if '$' in  path:
-        log.error('"$" character found in path "%s";'
-                  ' could be due to non-existant env var.', path)
-        sys.exit(1)
-
-
 # as seen in SO: https://stackoverflow.com/a/1131238
 def get_checksum(path: str) -> str:
     log.debug('calculating md5 checksum for "%s"', path)
@@ -89,4 +82,16 @@ def get_checksum(path: str) -> str:
         while chunk := f.read(4096):
             file_hash.update(chunk)
 
-    return file_hash.hexdigest()
\ No newline at end of file
+    return file_hash.hexdigest()
+
+
+def get_expanded_path(path: str) -> None:
+    log.debug('expanding path "%s"', path)
+    expanded_path: str = os.path.normpath(os.path.expandvars(path))
+    if '$' in expanded_path:
+        log.error('"$" character found in expanded path "%s";'
+                  ' could be due to non-existant env var.', expanded_path)
+        sys.exit(1)
+    log.debug('expanded path "%s" to "%s"', path, expanded_path)
+
+    return expanded_path
-- 
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