Add limited network support for Cargo projects

* Add test to scan cargo project with packages from a private registry
* Synchronize mono cert store
* Wipe nuget package cache before specs
* Compress /usr/local/share
* Exclude development dependencies
* Add CHANGELOG entry

3 files changed, 86 insertions, 1 deletions

diff --git a/lib/license/finder/ext.rb b/lib/license/finder/ext.rb
index e524771..fb593cc 100644
--- a/lib/license/finder/ext.rb
+++ b/lib/license/finder/ext.rb
@@ -2,6 +2,7 @@
 
 require 'license/finder/ext/bower'
 require 'license/finder/ext/bundler'
+require 'license/finder/ext/cargo'
 require 'license/finder/ext/composer'
 require 'license/finder/ext/conan'
 require 'license/finder/ext/dependency'
diff --git a/lib/license/finder/ext/cargo.rb b/lib/license/finder/ext/cargo.rb
new file mode 100644
index 0000000..20b1b03
--- /dev/null
+++ b/lib/license/finder/ext/cargo.rb
@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+
+module LicenseFinder
+  class Cargo < PackageManager
+    SENTINEL = ' -|- '
+
+    def installed?(*)
+      true
+    end
+
+    def prepare
+      create_vendor_path
+
+      within_project_path do
+        shell.execute([:dpkg, '-i', '/opt/toolcache/rust*.deb'])
+        shell.execute([:asdf, :reshim])
+        shell.execute([:env, '|', :sort, '&&', :asdf, :exec, :cargo, :fetch, '-vv'], env: default_env)
+      end
+    end
+
+    def current_packages
+      within_project_path do
+        stdout, _stderr, status = shell.execute(scan_command)
+        status.success? ? parse(stdout) : []
+      end
+    end
+
+    def possible_package_paths
+      [
+        project_path.join('Cargo.lock'),
+        project_path.join('Cargo.toml')
+      ]
+    end
+
+    private
+
+    def parse(stdout)
+      stdout.each_line.map do |line|
+        next if line.include?(project_path.to_s)
+
+        map_from(line.chomp)
+      end.compact
+    end
+
+    def scan_command
+      [
+        :asdf, :exec,
+        :cargo, :tree, '--edges=no-dev',
+        "--color=never",
+        "--offline",
+        "--prefix=none",
+        "-f='{p}#{SENTINEL}{l}'"
+      ]
+    end
+
+    def default_env
+      @default_env ||= {
+        'CARGO_HOME' => vendor_path.to_s,
+        'CARGO_TARGET_DIR' => vendor_path.to_s,
+        'HTTP_TIMEOUT' => '10',
+        'HTTP_CAINFO' => shell.default_certificate_path.to_s,
+        'TERM' => 'dumb'
+      }
+    end
+
+    def map_from(line)
+      name_version, license = line.split(SENTINEL, 2)
+      name, version = name_version.split(' ', 2)
+
+      Dependency.new(
+        'Cargo',
+        name,
+        version,
+        detection_path: detected_package_path,
+        install_path: path_to(name, version),
+        spec_licenses: license ? license.split('/') : []
+      )
+    end
+
+    def path_to(name, version)
+      Dir.glob("/opt/asdf/installs/rust/**/registry/src/**/#{name}-#{version}")[0]
+    end
+  end
+end
diff --git a/lib/license/management/version.rb b/lib/license/management/version.rb
index 9e5f556..e3de501 100644
--- a/lib/license/management/version.rb
+++ b/lib/license/management/version.rb
@@ -2,6 +2,6 @@
 
 module License
   module Management
-    VERSION = '3.20.1'
+    VERSION = '3.21.0'
   end
 end