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-rw-r--r--Library/Homebrew/dev-cmd/update-test.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/Library/Homebrew/dev-cmd/update-test.rb b/Library/Homebrew/dev-cmd/update-test.rb
index 18980b691..8d0391f66 100644
--- a/Library/Homebrew/dev-cmd/update-test.rb
+++ b/Library/Homebrew/dev-cmd/update-test.rb
@@ -8,11 +8,16 @@
#: If `--before=<date>` is passed, use the commit at `<date>` as the
#: start commit.
#:
+#: If `--to-tag` is passed, set HOMEBREW_UPDATE_TO_TAG to test updating
+#: between tags.
+#:
#: If `--keep-tmp` is passed, retain the temporary directory containing
#: the new repository clone.
module Homebrew
def update_test
+ ENV["HOMEBREW_UPDATE_TO_TAG"] = "1" if ARGV.include?("--to-tag")
+
cd HOMEBREW_REPOSITORY
start_commit = if commit = ARGV.value("commit")
commit