From fa32d6d240de24e11aa0239d240e136ae8876341 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 10 May 2021 10:05:52 +0200
Subject: Generate .gitignore in .bpkg/ to prevent accidentally committing it

---
 bpkg/cfg-create.cxx | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/bpkg/cfg-create.cxx b/bpkg/cfg-create.cxx
index 355690a..f3ca80d 100644
--- a/bpkg/cfg-create.cxx
+++ b/bpkg/cfg-create.cxx
@@ -118,9 +118,29 @@ namespace bpkg
     // Create .bpkg/ and its subdirectories.
     //
     {
-      mk (c / bpkg_dir);
+      dir_path d (c / bpkg_dir);
+
+      mk (d);
       mk (c / certs_dir);
       mk (c / repos_dir);
+
+      // Create the .gitignore file that ignores everything under .bpkg/
+      // effectively making git ignore it (this prevents people from
+      // accidentally adding this directory to a git repository).
+      //
+      path f (d / ".gitignore");
+      try
+      {
+        ofdstream os (f);
+        os << "# This directory should not be version-controlled." << '\n'
+           << "#"                                                  << '\n'
+           << "*"                                                  << '\n';
+        os.close ();
+      }
+      catch (const io_error& e)
+      {
+        fail << "unable to write to " << f << ": " << e;
+      }
     }
 
     // Initialize tmp directory.
-- 
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