diff --git a/Gemfile b/Gemfile
index abd3efa6dfbf3f86b9adb518f4a350b9b7c32e28..4924401c7c56d18467a3569d1d0bf87d5b4f9557 100644
--- a/Gemfile
+++ b/Gemfile
@@ -276,6 +276,9 @@ gem 'charlock_holmes', '~> 0.7.7'
# Detect mime content type from content
gem 'ruby-magic', '~> 0.3'
+# Fake version of the gem to trick bundler
+gem 'mimemagic', '0.3.5', path: 'vendor/shims/mimemagic', require: false
+
# Faster blank
gem 'fast_blank'
diff --git a/Gemfile.lock b/Gemfile.lock
index ef184e94bf15d6d4ec3fba7558de3c9dbb15ca0e..7a4101d538200918b456590cb547cab9fda280e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,8 @@
+PATH
+ remote: vendor/shims/mimemagic
+ specs:
+ mimemagic (0.3.5)
+
GEM
remote: https://rubygems.org/
specs:
@@ -728,7 +733,6 @@ GEM
mime-types (3.3.1)
mime-types-data (~> 3.2015)
mime-types-data (3.2020.0512)
- mimemagic (0.3.5)
mini_histogram (0.3.1)
mini_magick (4.10.1)
mini_mime (1.0.2)
@@ -1482,6 +1486,7 @@ DEPENDENCIES
marginalia (~> 1.10.0)
memory_profiler (~> 0.9)
method_source (~> 1.0)
+ mimemagic (= 0.3.5)!
mini_magick (~> 4.10.1)
minitest (~> 5.11.0)
multi_json (~> 1.14.1)
diff --git a/changelogs/unreleased/mimemagic_shim.yml b/changelogs/unreleased/mimemagic_shim.yml
new file mode 100644
index 0000000000000000000000000000000000000000..0376122f0ce83c7d62654543730cdda577feff9f
--- /dev/null
+++ b/changelogs/unreleased/mimemagic_shim.yml
@@ -0,0 +1,5 @@
+---
+title: Switch to using a fake mimemagic gem
+merge_request: 57443
+author:
+type: other
diff --git a/vendor/shims/mimemagic/Gemfile b/vendor/shims/mimemagic/Gemfile
new file mode 100644
index 0000000000000000000000000000000000000000..ef48903d334444c2406286b404e071f31781b3da
--- /dev/null
+++ b/vendor/shims/mimemagic/Gemfile
@@ -0,0 +1,6 @@
+source "https://rubygems.org"
+
+# Specify your gem's dependencies in mimemagic.gemspec
+gemspec
+
+gem "rake", "~> 12.0"
diff --git a/vendor/shims/mimemagic/LICENSE.txt b/vendor/shims/mimemagic/LICENSE.txt
new file mode 100644
index 0000000000000000000000000000000000000000..568df6132bc97bcd35cce56d082980f29c97d8a0
--- /dev/null
+++ b/vendor/shims/mimemagic/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2021 GitLab B.V.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/shims/mimemagic/README.md b/vendor/shims/mimemagic/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..57ef8dc41e1e17c74aed8dd2e2adcf271fe98231
--- /dev/null
+++ b/vendor/shims/mimemagic/README.md
@@ -0,0 +1 @@
+This is a fake gem to prevent mimemagic from being included into GitLab.
diff --git a/vendor/shims/mimemagic/Rakefile b/vendor/shims/mimemagic/Rakefile
new file mode 100644
index 0000000000000000000000000000000000000000..43022f711e20ed55baf2470278eb8e428a04856f
--- /dev/null
+++ b/vendor/shims/mimemagic/Rakefile
@@ -0,0 +1,2 @@
+require "bundler/gem_tasks"
+task :default => :spec
diff --git a/vendor/shims/mimemagic/lib/mimemagic.rb b/vendor/shims/mimemagic/lib/mimemagic.rb
new file mode 100644
index 0000000000000000000000000000000000000000..1deab5d90a7b96c656b88a3d1cb2635979595cd6
--- /dev/null
+++ b/vendor/shims/mimemagic/lib/mimemagic.rb
@@ -0,0 +1,6 @@
+require "mimemagic/version"
+
+module MimeMagic
+ class Error < StandardError; end
+ raise Error, 'This gem should never be required'
+end
diff --git a/vendor/shims/mimemagic/lib/mimemagic/version.rb b/vendor/shims/mimemagic/lib/mimemagic/version.rb
new file mode 100644
index 0000000000000000000000000000000000000000..fb46494748a6979e45e17db1eb3e665dabeeec60
--- /dev/null
+++ b/vendor/shims/mimemagic/lib/mimemagic/version.rb
@@ -0,0 +1,3 @@
+module MimeMagic
+ VERSION = "0.3.5"
+end
diff --git a/vendor/shims/mimemagic/mimemagic.gemspec b/vendor/shims/mimemagic/mimemagic.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..3b92efd621908649c8ebd35d5a85ca78940bc407
--- /dev/null
+++ b/vendor/shims/mimemagic/mimemagic.gemspec
@@ -0,0 +1,20 @@
+require_relative 'lib/mimemagic/version'
+
+Gem::Specification.new do |spec|
+ spec.name = "mimemagic"
+ spec.version = MimeMagic::VERSION
+ spec.authors = ["Marc Shaw"]
+ spec.email = ["mshaw@gitlab.com"]
+
+ spec.summary = %q{MimeMagic shim}
+ spec.description = %q{A shim for mimemagic}
+ spec.license = "MIT"
+ spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+
+ # Specify which files should be added to the gem when it is released.
+ # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+ spec.files = Dir.chdir(File.expand_path('..', __FILE__)) do
+ `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+ end
+ spec.require_paths = ["lib"]
+end