From 698cf146ace41841a6388d681abaf36d316c0778 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 8 Jun 2025 21:27:19 +0900
Subject: [PATCH] Fetch only necessary commits of bundled gems

---
 defs/gmake.mk              |  2 +-
 tool/fetch-bundled_gems.rb | 14 ++++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/defs/gmake.mk b/defs/gmake.mk
index 87fc8021b2..a81d82eadd 100644
--- a/defs/gmake.mk
+++ b/defs/gmake.mk
@@ -365,7 +365,7 @@ $(srcdir)/.bundle/.timestamp:
 define build-gem
 $(srcdir)/gems/src/$(1)/.git: | $(srcdir)/gems/src
 	$(ECHO) Cloning $(4)
-	$(Q) $(GIT) clone $(4) $$(@D)
+	$(Q) $(GIT) clone --depth=1 --no-tags $(4) $$(@D)
 
 $(bundled-gem-revision): \
 	$(if $(if $(wildcard $$(@)),$(filter $(3),$(shell cat $$(@)))),,PHONY) \
diff --git a/tool/fetch-bundled_gems.rb b/tool/fetch-bundled_gems.rb
index f50bda360a..b76feefd94 100755
--- a/tool/fetch-bundled_gems.rb
+++ b/tool/fetch-bundled_gems.rb
@@ -24,20 +24,22 @@ next unless n
 next if n =~ /^#/
 next if bundled_gems&.all? {|pat| !File.fnmatch?(pat, n)}
 
-if File.directory?(n)
-  puts "updating #{color.notice(n)} ..."
-  system("git", "fetch", "--all", chdir: n) or abort
-else
+unless File.exist?("#{n}/.git")
   puts "retrieving #{color.notice(n)} ..."
-  system(*%W"git clone #{u} #{n}") or abort
+  system(*%W"git clone --depth=1 --no-tags #{u} #{n}") or abort
 end
 
 if r
   puts "fetching #{color.notice(r)} ..."
   system("git", "fetch", "origin", r, chdir: n) or abort
+  c = r
+else
+  c = ["v#{v}", v].find do |c|
+    puts "fetching #{color.notice(c)} ..."
+    system("git", "fetch", "origin", "refs/tags/#{c}:refs/tags/#{c}", chdir: n)
+  end or abort
 end
 
-c = r || "v#{v}"
 checkout = %w"git -c advice.detachedHead=false checkout"
 print %[checking out #{color.notice(c)} (v=#{color.info(v)}]
 print %[, r=#{color.info(r)}] if r