init commit.

README.md

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+# open_explorer
+
+Redmine插件，一键打开归档地址。
+
+## Install
+
+```
+cd plugins
+git clone https://git.licsber.site/ruby/open_explorer
+```

app/views/hooks/_view_issues_show_description_bottom.html.erb

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+<% issue = @issue %>
+
+<% archive_custom_field = issue.custom_field_values.find { |cfv| cfv.custom_field.name == "归档地址" } %>
+
+<% if archive_custom_field && archive_custom_field.value.present? %>
+  <% archive_url = archive_custom_field.value.strip %>
+  <a href="<%= archive_url %>" target="_blank" class="icon icon-attachment" style="font-weight: bold; padding: 5px 10px; background: #428bca; color: white; text-decoration: none; border-radius: 3px;">📂 一键打开归档地址</a>
+<% end %>

init.rb

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+Redmine::Plugin.register :open_explorer do
+  name 'Open Explorer plugin'
+  author 'licsber'
+  description 'Open archive path using explorer.'
+  version '0.0.1'
+  url 'https://git.licsber.site/ruby/open_explorer'
+  author_url 'https://licsber.site'
+end

lib/hooks.rb

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+class Hooks < Redmine::Hook::ViewListener
+  render_on :view_issues_show_description_bottom,
+            :partial => 'hooks/view_issues_show_description_bottom'
+end