Change file permissions with Ruby
You can say
File.chmod(0604, '/path/to/file') # rw----r--
The leading zero is meaningful.
Related cards:
Restore changes, even from deleted files, with RubyMines "Local History"-Feature
Sometimes, due to git or other "accidents", important files get deleted or overwritten.
At a state when even Ctrl+Z doesn't work anymore, you maybe can rescue your files with RubyMines "Local History"-Feature!
To do this try the following:
- If...
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
How to exclusively lock file access in ruby
We will achieve this by creating a block accepting method to optionally create and then lock a .lock File of the underlying accessed file.
Why create a .lock file?
- The main advantage of creating a
.lockfile is that#flockmight bl...
Dynamically uploading files to Rails with jQuery File Upload
Say we want …
- to create a
Gallerythat has a name andhas_many :images, which in turn have a caption - to offer the user a single form to create a gallery with any number of images
- immediate uploads with a progress bar per image
- a snapp...
See with tig which git commits touch a file or files or folders
tig path_to_file_or_files_or_path_with_wildcard
Legacy CarrierWave: How to generate versions with different file extensions
We use CarrierWave in many of our projects to store and serve files of various formats - mostly images. A common use case of CarrierWave's DSL is to "proce...
Ruby: Using the pry debugger in projects with older Ruby versions
In case you want to use pry with an older version of Ruby, you can try the following configurations.
Ruby 1.8.7
Your pry version must not be greater than 0.9.10.
gem 'pry', '=0.9.10'
gem 'ruby-debug',...
How to open files from better_errors with RubyMine on Linux
I recently noticed that better_errors allows you to to open files from within your favorite editor. However it was not so easy to get rubymine:// links to work ...
Freeze (vendor, unpack) a single Ruby gem with and without Bundler
When you need to patch an existing gem, one way is to "vendor" the gem by copying it into the vendor/gems directory of your Rails project. You can then make any changes you require and Rails will use the vendored version of the gem after a serve...
Change the timestamp of a file in Ruby
This is somewhat similar to the touch command of Linux:
FileUtils.touch 'example.txt', :mtime => Time.now - 2.hours
If you omit the :mtime the modification timestamp will be set to the current time:
FileUtils.touch 'example.txt'
Yo...