Make git_clone() to abbreviate (16 chars) commit id-based directory name

1 files changed, 7 insertions, 1 deletions

diff --git a/bpkg/fetch-git.cxx b/bpkg/fetch-git.cxx
index a60a160..a9a548e 100644
--- a/bpkg/fetch-git.cxx
+++ b/bpkg/fetch-git.cxx
@@ -919,7 +919,13 @@ namespace bpkg
       fetch_warn (cap, single_branch ? "branch" : "repository");
 
     dir_path d (destdir);
-    d /= dir_path (ref.branch ? *ref.branch : *ref.commit);
+
+    // Truncate commit id-based directory names to shorten the absolute
+    // directory path to lower probability of hitting the limit on Windows.
+    // Note that we can't do the same for branch/tag names as chances to clash
+    // would be way higher. Though such names are normally short anyway.
+    //
+    d /= dir_path (ref.branch ? *ref.branch : ref.commit->substr (0, 16));
 
     strings to (timeout_opts (co, url.scheme));