Unverified Commit 00367120 authored by Yorick Peterse's avatar Yorick Peterse
Browse files

Fix passing nil to protected_tag?

Previously this method would directly receive the output of tag_name().
This method could either return a String or nil. In the previous setup
this would somehow magically work but because Rugged::TagCollection#[]
doesn't accept nil values it started to fail.

To work around this the elsif in change_access_check() assigns the
result of tag_name() to a local and then _only_ calls protected_tag?()
if the tag name is not nil. The extra parenthesis are put in place to
ensure that things are parsed correctly, without these the code would be
parsed as follows:

    elsif tag_ref = (tag_name(ref) && protected_tag(tag_ref))

During runtime this would basically resolve to:

    elsif tag_ref = (tag_name(ref) && protected_tag(nil))

This is because when you refer to the variable you're assigning _in_ the
assignment Ruby returns nil instead of raising an error.
parent bcfe3274a7b8
......@@ -128,7 +128,7 @@ def change_access_check(change)
action =
if project.protected_branch?(branch_name(ref))
protected_branch_action(oldrev, newrev, branch_name(ref))
elsif protected_tag?(tag_name(ref))
elsif (tag_ref = tag_name(ref)) && protected_tag?(tag_ref)
# Prevent any changes to existing git tag unless user has permissions
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