setup.py: Do not error out when man directory is empty/missingchandan/toxic-man

If the `man` directory is empty, then it won't be copied in the source
distribution, and `list_man_pages()` will throw an exception when trying
to list files in a non-existent directory. This prevents us from
installing the BuildStream package when the man pages are not there.

The most common use-case for this is when we want to re-generate the man
pages but want to install the package before re-generating them.

1 files changed, 6 insertions, 2 deletions

diff --git a/setup.py b/setup.py
index 8038cd26f..49b115453 100755
--- a/setup.py
+++ b/setup.py
@@ -109,8 +109,12 @@ def check_for_bwrap():
 def list_man_pages():
     bst_dir = os.path.dirname(os.path.abspath(__file__))
     man_dir = os.path.join(bst_dir, 'man')
-    man_pages = os.listdir(man_dir)
-    return [os.path.join('man', page) for page in man_pages]
+    try:
+        man_pages = os.listdir(man_dir)
+        return [os.path.join('man', page) for page in man_pages]
+    except FileNotFoundError:
+        # Do not error out when 'man' directory does not exist
+        return []
 
 
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