Venturing into Ruby lands (learning Ruby). I like it, fun programming language.
Anyhow, I'm trying to build a simple program to delete suffixes from a folder, where user provides the path to the folder in the Mac terminal.
The scenario goes like this:
User runs my program
The program ask user to enter the folder path
User drags and drop the folder into the Mac terminal
Program receives path such as "/Users/zhang/Desktop/test\ folder"
Program goes and renames all files in that folder with suffix such as "image_mdpi.png" to "image.png"
I'm encountering a problem though.
Right now, I'm trying to list the contents of the directory using:
Dir.entries(#directoryPath)
However, it seems Dir.entries doesn't like backslashes '\' in the path. If I use Dir.entries() for a path with backslash, I get an exception saying folder or file doesn't exist.
So my next thought would be to use :
Pathname.new(rawPath)
To let Ruby create a proper path. Unfortunately, even Pathname.new() doesn't like backslash either. My terminal is spitting out
#directoryPath is not dir
This is my source code so far:
# ------------------------------------------------------------------------------
# Renamer.rb
# ------------------------------------------------------------------------------
#
# Program to strip out Android suffixes like _xhdpi, _hpdi, _mdpi and _ldpi
# but only for Mac at the moment.
#
# --------------------------------------------------
# Usage:
# --------------------------------------------------
# 1. User enters a the path to the drawable folder to clean
# 2. program outputs list of files and folder it detects to clean
# 3. program ask user to confirm cleaning
require "Pathname"
#directoryPath = ''
#isCorrectPath = false
# --------------------------------------------------
# Method definitions
# --------------------------------------------------
def ask_for_directory_path
puts "What is the path to the drawable folder you need cleaning?:"
rawPath = gets.chomp.strip
path = Pathname.new("#{rawPath}")
puts "Stored dir path = '#{path}'"
if path.directory?
puts "#directoryPath is dir"
else
puts "#directoryPath is not dir"
end
#directoryPath = path.to_path
end
def confirm_input_correct
print "\n\nIs this correct? [y/N]: "
#isCorrectPath = gets.chomp.strip
end
def reconfirm_input_correct
print "please enter 'y' or 'N': "
#isCorrectPath = gets.strip
end
def output_folder_path
puts "The folder '#{#directoryPath}' contains the following files and folders:"
# Dir.entries doesn't like \
# #directoryPath = #directoryPath.gsub("\\", "")
puts "cleaned path is '#{#directoryPath}'"
begin
puts Dir.entries(#directoryPath)
rescue
puts "\n\nLooks like the path is incorrect:"
puts #directoryPath
end
end
def clean_directory
puts "Cleaning directory now..."
end
puts "Hello, welcome to Renamer commander.\n\n"
ask_for_directory_path
output_folder_path
confirm_input_correct
while #isCorrectPath != 'y' && #isCorrectPath != 'N' do
reconfirm_input_correct
end
if #isCorrectPath == 'y'
clean_directory
else
ask_for_directory_path
end
I went through this learning resource for Ruby two three days ago:
http://rubylearning.com/satishtalim/tutorial.html
I'm also using these resource to figure out what I'm doing wrong:
http://ruby-doc.org/core-2.3.0/Dir.html
https://robm.me.uk/ruby/2014/01/18/pathname.html
Any ideas?
Edit
Well, the current work around(?) is to clean my raw string and delete any backslashes, using new method:
def cleanBackslash(originalString)
return originalString.gsub("\\", "")
end
Then
def ask_for_directory_path
puts "\nWhat is the path to the drawable folder you need cleaning?:"
rawPath = gets.chomp.strip
rawPath = cleanBackslash(rawPath)
...
end
Not the prettiest I guess.
A sample run of the program:
Zhang-computer:$ ruby Renamer.rb
Hello, welcome to Renamer commander.
What is the path to the drawable folder you need cleaning?:
/Users/zhang/Desktop/test\ folder
Stored dir path = '/Users/zhang/Desktop/test folder'
#directoryPath is dir
The folder '/Users/zhang/Desktop/test folder' contains the following files and folders:
cleaned path is '/Users/zhang/Desktop/test folder'
.
..
.DS_Store
file1.txt
file2.txt
file3.txt
Is this correct? [y/N]:
:]
I don't think the problem is with the backslash, but with the whitespace. You don't need to escape it:
Dir.pwd
# => "/home/lbrito/work/snippets/test folder"
Dir.entries(Dir.pwd)
# => ["..", "."]
Try calling Dir.entries without escaping the whitespace.
There is no backslash in the path. The backslash is an escape character displayed by the shell to prevent the space from being interpreted as a separator.
Just like Ruby displays strings containing double quotes by escaping those double quotes.
Okay, first of all, using gets.chomp.strip is probably not a good idea :P
The better and closer solution to what your normally see in a real bash program is to use the Readline library:
i.e.
require "Readline"
...
def ask_for_directory_path
rawPath = String.new
rawPath = Readline.readline("\nWhat is the path to the drawable folder you need cleaning?\n> ", true)
rawPath = rawPath.chomp.strip
rawPath = cleanBackslash(rawPath)
#directoryPath = Pathname.new(rawPath)
end
Using Readline lets you tab complete the folder path. I also needed to clean my backslash from the readline using my own defined:
def cleanBackslash(originalString)
return originalString.gsub("\\", "")
end
After that, the Dir.entries(#directorPath) is able to list all the files and folders in the path, whether the user typed it in manually or drag and drop the folder into the Mac terminal:
Zhang-iMac:Renamer zhang$ ruby Renamer.rb
Hello, welcome to Renamer commander.
What is the path to the drawable folder you need cleaning?
> /Users/zhang/Ruby\ Learning/Renamer/test_folder
The folder '/Users/zhang/Ruby Learning/Renamer/test_folder' contains the following files and folders:
.
..
.DS_Store
drawable
drawable-hdpi
drawable-mdpi
drawable-xhdpi
drawable-xxhdpi
drawable-xxxhdpi
Is this correct? [y/N]: y
Cleaning directory now...
The program is not finish but I think that fixes my problem of the backslash getting in the way.
I don't know how real bash programs are made, but consider this my poor man's bash program lol.
Final program
Check it out:
I feel like a boss now! :D
Related
I'm following a tutorial and am trying to change the names of three files in a folder that's located under 'drive/users/myname/test'. I'm getting the error:
'chdir': No such file or directory - test'.
The starting path is already 'drive/users/myname', which is why I thought that I only had to enter 'test' for Dir.chdir.
How do I correctly input the paths on Mac OS?
Dir.chdir('test')
pic_names = Dir['test.{JPG,jpg}']
puts "What do you want to call this batch"
batch_name = gets.chomp
puts
print "Downloading #{pic_names.length} files: "
pic_number = 1
pic_names.each do |p|
print '.'
new_name = "batch_name#{pic_number}.jpg"
File.rename(name, new_name)
pic_number += 1
end
I think you have to provide the absolute path. So, your first line should be:
Dir.chdir("/drive/users/myname/test")
According to the documentation:
Dir.chdir("/var/spool/mail")
puts Dir.pwd
should output/var/spool/mail.
You can look at the documentation for more examples.
In:
File.rename(name, new_name)
name is never defined prior to its attempted use.
Perhaps p is supposed to be name, or name should be p?
With that assumption I'd write the loop something like:
pic_names.each_with_index do |name, pic_number|
print '.'
new_name = "#{ batch_name }#{ 1 + pic_number }.jpg"
File.rename(name, File.join(File.dirname(name), new_name))
end
File.join(File.dirname(name), new_name) is important. You have to refer to the same path in both the original and new filenames, otherwise the file will be moved to a new location, which would be wherever the current-working-directory points to. That's currently masked by your use of chdir at the start, but, without that, you'd wonder where your files went.
What I like to achive is to track the file changes in two directories by using the watchr.
my file structure is the following:
/PluginDir
/classes
Wrapper.php
/Tests
/classes
WrapperTest.php
autotest_watchr.rb
The contents of the autotest_watchr.rb is the following:
watch("../../classes/(.*).php") do |match|
run_test %{#{match[1]}Test.php}
end
watch(".*Test.php") do |match|
run_test match[0]
end
def run_test(file)
clear_console()
unless File.exists?(file)
puts "#{file} does not exists"
return
end
puts "Running #{file}"
results = `phpunit #{file}`
puts results
if results.match(/OK/)
notify "#{file}", "Tests Passed Successfuly", 4500
elsif results.match(/FAILURES\!/)
notify_failed file, results
end
end
def notify_failed cmd, results
failed_examples = results.scan(/([0-9]+\))\s+(.*)/)
notify "#{cmd}", failed_examples[0], 6000
end
def notify title, msg, show_time
systemMsg = "notifu.exe /p \"#{title}\" /m \"#{msg}\" /d #{show_time}"
systemMsg.gsub('“', "'")
system systemMsg
end
def clear_console
system "cls"
end
then from folder /PluginDir/Tests/classes/ I execute the following command from cmd:
watchr autotest_watchr.rb
In this case, the script starts normaly the execution, and when ever I made a modification in my Test files, the console is updated, but when I create a modification in the /PluginDir/classes/*.php files I do not get any update in my console.
Why?
NOTE: In first watch("../../classes/...... I have try also the match[0] just in case the regex variable is not correct, but still the script not works
In your first search string "../../classes/(.*).php" I think that the "." character is actually a place holder for any single character.
For your usage you probably need to escape it with backslashes, so it would be:
'\.\./\.\./classes/(.*)\.php'
I have this statement:
File.open(some_path, 'w+') { |f| f.write(builder.to_html) }
Where
some_path = "somedir/some_subdir/some-file.html"
What I want to happen is, if there is no directory called somedir or some_subdir or both in the path, I want it to automagically create it.
How can I do that?
You can use FileUtils to recursively create parent directories, if they are not already present:
require 'fileutils'
dirname = File.dirname(some_path)
unless File.directory?(dirname)
FileUtils.mkdir_p(dirname)
end
Edit: Here is a solution using the core libraries only (reimplementing the wheel, not recommended)
dirname = File.dirname(some_path)
tokens = dirname.split(/[\/\\]/) # don't forget the backslash for Windows! And to escape both "\" and "/"
1.upto(tokens.size) do |n|
dir = tokens[0...n]
Dir.mkdir(dir) unless Dir.exist?(dir)
end
For those looking for a way to create a directory if it doesn't exist, here's the simple solution:
require 'fileutils'
FileUtils.mkdir_p 'dir_name'
Based on Eureka's comment.
directory_name = "name"
Dir.mkdir(directory_name) unless File.exists?(directory_name)
How about using Pathname?
require 'pathname'
some_path = Pathname("somedir/some_subdir/some-file.html")
some_path.dirname.mkdir_p
some_path.write(builder.to_html)
Based on others answers, nothing happened (didn't work). There was no error, and no directory created.
Here's what I needed to do:
require 'fileutils'
response = FileUtils.mkdir_p('dir_name')
I needed to create a variable to catch the response that FileUtils.mkdir_p('dir_name') sends back... then everything worked like a charm!
Along similar lines (and depending on your structure), this is how we solved where to store screenshots:
In our env setup (env.rb)
screenshotfolder = "./screenshots/#{Time.new.strftime("%Y%m%d%H%M%S")}"
unless File.directory?(screenshotfolder)
FileUtils.mkdir_p(screenshotfolder)
end
Before do
#screenshotfolder = screenshotfolder
...
end
And in our hooks.rb
screenshotName = "#{#screenshotfolder}/failed-#{scenario_object.title.gsub(/\s+/,"_")}-#{Time.new.strftime("%Y%m%d%H%M%S")}_screenshot.png";
#browser.take_screenshot(screenshotName) if scenario.failed?
embed(screenshotName, "image/png", "SCREENSHOT") if scenario.failed?
The top answer's "core library" only solution was incomplete. If you want to only use core libraries, use the following:
target_dir = ""
Dir.glob("/#{File.join("**", "path/to/parent_of_some_dir")}") do |folder|
target_dir = "#{File.expand_path(folder)}/somedir/some_subdir/"
end
# Splits name into pieces
tokens = target_dir.split(/\//)
# Start at '/'
new_dir = '/'
# Iterate over array of directory names
1.upto(tokens.size - 1) do |n|
# Builds directory path one folder at a time from top to bottom
unless n == (tokens.size - 1)
new_dir << "#{tokens[n].to_s}/" # All folders except innermost folder
else
new_dir << "#{tokens[n].to_s}" # Innermost folder
end
# Creates directory as long as it doesn't already exist
Dir.mkdir(new_dir) unless Dir.exist?(new_dir)
end
I needed this solution because FileUtils' dependency gem rmagick prevented my Rails app from deploying on Amazon Web Services since rmagick depends on the package libmagickwand-dev (Ubuntu) / imagemagick (OSX) to work properly.
To determine the file type of an attached file, I used the OS "file" utility:
class AttachedFileTypeValidator < ActiveModel::Validator
def validate(record)
file = record.resource.uploaded_file
attached_file = Rails.root + file.path
file_type = `file #{attached_file}`
Rails.logger.info "Attached file type determined to be: #{file_type}"
unless file_type.split(',').first =~ /ASCII|UTF/
record.errors[:resource_content_type] << "Attachment does not appear to be a text CSV file, please ensure it was saved correctly."
end
end
end
Unfortunately brakeman suggests its a command line injection opportunity. I'm assuming this means someone figures out a clever name for a file like:
; rm -rf /;
And away we go. Whats a good way to sanitize filenames?
Use IO#popen to call the external command:
file_type = IO.popen(['file', attached_file]).read
This will handle proper escaping of funny characters in the filename for you.
Hey I'm trying to move multiple files from one folder to another. In the FileUtils line I am trying to search through all of the 4 character folders in the destination folder and then paste the file in the folder with the same base name as the file.
#!/usr/bin/env ruby
require 'fileutils'
my_dir = Dir["C:/Documents and Settings/user/Desktop/originalfiles/*.doc"]
my_dir.each do |filename|
FileUtils.cp(filename, "C:/Documents and Settings/user/Desktop/destinationfolder/****/" + File.basename(filename, ".doc"))
end
Something like this should work.
my_dir = Dir["C:/Documents and Settings/user/Desktop/originalfiles/*.doc"]
my_dir.each do |filename|
name = File.basename('filename', '.doc')[0,4]
dest_folder = "C:/Documents and Settings/user/Desktop/destinationfolder/#{name}/"
FileUtils.cp(filename, dest_folder)
end
You have to actually specify the destination folder, I don't think you can use wildcards.
I had to copy 1 in every 3 files from multiple directories to another. For those who wonder, this is how I did it:
require 'fileutils'
# Print origin folder question
puts 'Please select origin folder'
# Select origin folder
origin_folder = gets.chomp
# Select every file inside origin folder with .png extension
origin_folder = Dir["#{origin_folder}/*png"]
# Print destination folder question
puts 'Please select destination folder'
# Select destination folder
destination_folder = gets.chomp
# Select 1 in every 3 files in origin folder
(0..origin_folder.length).step(3).each do |index|
# Copy files
FileUtils.cp(origin_folder[index], destination_folder)
end
* is a wildcard meaning "any number of characters", so "****" means "any number of any number of any number of any number of characters", which is probably not what you mean.
? is the proper symbol for "any character in this position", so "????" means "a string of four characters only".