From 49fe24ef1af838494da646b5ee9ab056fed78e0e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 10 May 2021 09:48:41 +0200
Subject: Generate .gitignore in .bdep/ to prevent accidentally committing it

---
 bdep/init.cxx | 36 ++++++++++++++++++++++++++++++------
 bdep/init.hxx |  6 ++++++
 bdep/new.cxx  |  2 +-
 3 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/bdep/init.cxx b/bdep/init.cxx
index dbb85cb..a3f0859 100644
--- a/bdep/init.cxx
+++ b/bdep/init.cxx
@@ -15,6 +15,35 @@ using namespace std;
 
 namespace bdep
 {
+  void
+  mk_bdep_dir (const dir_path& d)
+  {
+    dir_path sd (d / bdep_dir);
+
+    if (!exists (sd))
+    {
+      mk (sd);
+
+      // Create the .gitignore file that ignores everything under .bdep/
+      // effectively making git ignore it (this prevents people from
+      // accidentally adding this directory to a git repository).
+      //
+      path f (sd / ".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;
+      }
+    }
+  }
+
   shared_ptr<configuration>
   cmd_init_config (const configuration_name_options& o,
                    const configuration_add_options& ao,
@@ -192,12 +221,7 @@ namespace bdep
 
     // Create .bdep/.
     //
-    {
-      dir_path d (prj / bdep_dir);
-
-      if (!exists (d))
-        mk (prj / bdep_dir);
-    }
+    mk_bdep_dir (prj);
 
     // Open the database creating it if necessary.
     //
diff --git a/bdep/init.hxx b/bdep/init.hxx
index 475c87e..6a2afd2 100644
--- a/bdep/init.hxx
+++ b/bdep/init.hxx
@@ -49,6 +49,12 @@ namespace bdep
   cmd_init_options
   merge_options (const default_options<cmd_init_options>&,
                  const cmd_init_options&);
+
+  // Create the .bdep/ subdirectory in the specified directory if it does not
+  // already exist.
+  //
+  void
+  mk_bdep_dir (const dir_path&);
 }
 
 #endif // BDEP_INIT_HXX
diff --git a/bdep/new.cxx b/bdep/new.cxx
index 51a5308..aac8221 100644
--- a/bdep/new.cxx
+++ b/bdep/new.cxx
@@ -3123,7 +3123,7 @@ cmd_new (cmd_new_options&& o, cli::group_scanner& args)
 
   // Create .bdep/.
   //
-  mk (prj / bdep_dir);
+  mk_bdep_dir (prj);
 
   // Initialize tmp directory.
   //
-- 
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