add a cache_dir_mode option to set the permission mode on the cached tmp files

Author: nathantsoi

CHANGELOG.markdown

@@ -2,6 +2,8 @@
 
 ## unreleased
 
+* Added `cache_dir_permissions` option to cache results [@nathantsoi](https://github.com/nathantsoi)
+
 ## v0.24.2 (2017-02-18)
 
 * Describe `nice` level option [#140](https://github.com/toy/image_optim/issues/140) [@toy](https://github.com/toy)

README.markdown

@@ -270,6 +270,7 @@ optipng:
 * `:skip_missing_workers` — Skip workers with missing or problematic binaries *(defaults to `false`)*
 * `:allow_lossy` — Allow lossy workers and optimizations *(defaults to `false`)*
 * `:cache_dir` — Configure cache directory
+* `:cache_dir_mode` — Configure cache directory permissions mode per https://apidock.com/ruby/FileUtils/chmod
 * `:cache_worker_digests` - Also cache worker digests along with original file digest and worker options: updating workers invalidates cache
 
 Worker can be disabled by passing `false` instead of options hash or by setting option `:disable` to `true`.

lib/image_optim.rb

@@ -41,6 +41,9 @@ class ImageOptim
   # Cache directory
   attr_reader :cache_dir
 
+  # Cache directory permissions mode per https://apidock.com/ruby/FileUtils/chmod
+  attr_reader :cache_dir_mode
+
   # Cache worker digests
   attr_reader :cache_worker_digests
 
@@ -75,6 +78,7 @@ def initialize(options = {})
       skip_missing_workers
       allow_lossy
       cache_dir
+      cache_dir_mode
       cache_worker_digests
     ].each do |name|
       instance_variable_set(:"@#{name}", config.send(name))

lib/image_optim/cache.rb

@@ -33,6 +33,7 @@ def fetch(original)
 
       if optimized
         tmp = FSPath.temp_file_path(digest, @cache_dir)
+        FileUtils.chmod(@cache_dir_permissions, tmp) unless @cache_dir_permissions.nil?
         FileUtils.mv(optimized, tmp)
         tmp.rename(cached)
         cached_path = CachePath.convert(cached)

lib/image_optim/config.rb

@@ -153,6 +153,11 @@ def cache_dir
       dir unless dir.nil? || dir.empty?
     end
 
+    def cache_dir_mode
+      dir_mode = get!(:cache_dir_mode)
+      dir_mode unless dir_mode.nil?
+    end
+
     def cache_worker_digests
       !!get!(:cache_worker_digests)
     end

lib/image_optim/runner/option_parser.rb

@@ -153,6 +153,11 @@ def wrap_regex(width)
     options[:cache_dir] = cache_dir
   end
 
+  op.on('--cache-dir-mode MODE', 'Cache optimized images '\
+        'with the specified permissions mode') do |cache_dir|
+    options[:cache_dir_mode] = cache_dir_mode
+  end
+
   op.on('--cache-worker-digests', 'Cache worker digests '\
         '(updating workers invalidates cache)') do |cache_worker_digests|
     options[:cache_worker_digests] = cache_worker_digests