Add logic of cwd, dry_run

link-tool.py

@@ -7,7 +7,6 @@ import logging
 
 from typing import List, Tuple, Union
 
-
 logger = logging.getLogger(__name__)
 
 @dataclasses.dataclass(repr=True)
@@ -66,28 +65,37 @@ def load_config(conf_path: str) -> Tuple[Conf, List[Link]]:
 
     return conf, links
 
-def make_link(links: List[Link]):
+def make_link(links: List[Link], dry_run=False):
     for link in links:
         if os.path.exists(link.dst):
             logger.warning('dst exists, removing: {}'.format(link.dst))
-            os.remove(link.dst)
+            if not dry_run:
+                os.remove(link.dst)
 
         dst_dir = os.path.dirname(link.dst)
         if not os.path.exists(dst_dir):
             logger.info('dst directory not exists, creating: {}'.format(dst_dir))
-            os.makedirs(dst_dir)
+            if not dry_run:
+                os.makedirs(dst_dir)
 
-        os.link(link.src, link.dst)
+        logger.info('creating link: {}'.format(link.dst))
+        if not dry_run:
+            os.link(link.src, link.dst)
 
 def main():
     parser = argparse.ArgumentParser()
-    parser.add_argument('-c', '--config', required=True, help='configuration file')
-    parser.add_argument('-v', '--verbose', action='store_true' ,help='more verbose log')
+    parser.add_argument('-c', '--config', required=True,
+                        help='configuration file')
+    parser.add_argument('-n', '--dry-run', action='store_true',
+                        help='dry run without actually create link')
+    parser.add_argument('-v', '--verbose', action='store_true',
+                        help='more verbose log')
 
     args = parser.parse_args()
 
     config_path = args.config
     verbose = args.verbose
+    dry_run = args.dry_run
 
     logging.basicConfig(level=logging.DEBUG if verbose else logging.INFO)
 
@@ -100,7 +108,14 @@ def main():
     for link in links:
         logger.info('loaded link: {}'.format(link))
 
-    make_link(links)
+    assert(config.cwd is not None)
+    config_path_dir = os.path.dirname(config_path)
+    chdir_target = os.path.join(config_path_dir, config.cwd)
+    logger.info('changing CWD: {}/{}'.format(config_path_dir, config.cwd))
+    logger.info('the CWD realpath: {}'.format(os.path.realpath(chdir_target)))
+    os.chdir(chdir_target)
+
+    make_link(links, dry_run=dry_run)
 
 if __name__ == '__main__':
     main()

test/src/link1.conf

@@ -1,6 +1,6 @@
 # cwd is used for the pwd of src and dst defined below.
 # the cwd is relative to the its config file, such as this file
-cwd = '.'
+cwd = ../..
 
 # this is comment
 test/src/file1.txt -> test/dst/file1.txt