I have a ruby script where my "config" is in an extra file. It's called ftp_config.rb. Then I have filetrack.rb that downloads files from a ftp server - what files/directories is specified in ftp_config.rb. And finally I got rufus_download.rb that is calling a function from filetrack.rb every day so I get all new files from the server.
Everything works fine just I want to know how to make it so when I edit ftp_config.rb the changes are picked up by the script without the need to restart rufus_download.rb.
currenly
rufus_download.rb contains require_relative 'filetrack'
filetrack.rb contains require_relative 'ftp_config'
Right now if I add new files to be downloaded to ftp_config.rb I need to restart rufus
require_relative returns false if the file you have requested is already loaded to your ruby script and returns true if you haven't
If you want changes to be loaded directly you need to load files
load 'path/to/ftp_config'
every time your script executes it will load / reload the script
EDIT:
you can load by expanding path of the current ruby script:
load ::File.expand_path('../ftp_config.rb', __FILE__)
Assuming that files are in the same folder
EDITEND
hope that helps
You need a gem that monitors filechanges like "sinatra/reloader" for Sinatra and eg filewatcher or listen for desktop apps. After detecting an update you load the script, not require, that only loads a script once.
Here an example of filewatcher.
STDOUT.sync = true
FileWatcher.new(['c:/test/scans']).watch() do |filename, event|
puts filename
if(event == :changed)
puts "File updated: " + filename
end
if(event == :delete)
puts "File deleted: " + filename
end
if(event == :new)
puts "Added file: " + filename
end
end
Related
My test suite has a cucumber front end with a ruby backend, running the latest version of watir-webdriver and its dependencies atop the latest version of OSX. My cucumber environment is setup to execute in Firefox.
The export feature of our app creates a zip file but to test the import feature, I need the contents of the zip file.
My actual test needs to unpack that zip file and select the individual files in it for use in testing the import feature of our web application.
Can anyone point me to a reference that can help me figure out how to write that?
Based off my experience, you download this file the same way that a normal user might. So first off, you just click the download button or whatever and then can access the file wherever it is and check out its contents.
Assuming the downloads just go to your Downloads folder by default, there is some simple code you can use to select the most recently downloaded item:
fn = Dir.glob("~/Downloads/*.zip").max { |a,b| File.ctime(a) <=> File.ctime(b)}
Then just use the unzip shell command to unzip the file. No reason to add another gem into the mix when you can just use generic shell commands.
`unzip #{fn}`
Then, you'd use Dir.glob again to get the filenames of everything inside the unzipped files folder. Assuming the file was named "thing.zip", you do this:
files = Dir.glob("~/Downloads/thing/*")
If you want to files to be downloaded directly to your project folder, you can try this. This also prevents the popup from asking you if you really want to save the file which is handy. I think this still works but haven't used it in some time. The above stuff works for sure though.
profile = Selenium::WebDriver::Firefox::Profile.new
download_dir = Dir.pwd + "/test_downloads"
profile['browser.download.dir'] = download_dir
profile['browser.helperApps.neverAsk.saveToDisk'] = "application/zip"
b = Watir::Browser.new. :firefox, :profile => profile
I ended up adding the rubyzip gem at https://github.com/rubyzip/rubyzip
the solution is on that link but i modified mine a little bit. I added the following to my common.rb file. see below:
require 'Zip'
def unpack_zip
test_home='/Users/yournamegoeshere/SRC/watir_testing/project files'
sleep(5) #<--manually making time to hit the save download dialog
zip_file_paths = []
Find.find(test_home) do |path|
zip_file_paths << path if path =~ /.*\.zip$/
end
file_name=zip_file_paths[0]
Zip::File.open(file_name) do |zip_file|
# Handle entries one by one
zip_file.each do |entry|
# Extract to file/directory/symlink
puts "Extracting #{entry.name}"
entry.extract(test_home + "/" + entry.name)
# Read into memory
content = entry.get_input_stream.read
end
# Find specific entry
entry = zip_file.glob('*.csv').first
puts entry.get_input_stream.read
end
end
This solution works great!
My program reads a configuration file every 3 sec. within a while loop. Once I change the configuration file with an external editor like notepad, my program creates a temporary file for some reason and keeps reading from there.
I want my program to read from the current configuration file in order to have the most recent changes in my program.
What can I do about it?
Simplified code:
while(true)
file = File.open(filename, "r")
data = JSON.parse(file.read) if file
file.close
sleep(3)
end
If you are on linux, you can try linux inotfy service, this is the gem. This is an example of how to use it.
First of all you have to run
gem install ruby-inotify
and then try this code
notifier = Inotify.new
notifier.add_watch(filename, Inotify::CREATE | Inotify::MODIFY)
notifier.each_event do |ev|
file = File.open(filename, "r")
data = JSON.parse(file.read)
file.close
end
If you are open to using a gem for this, use the following.
https://github.com/thomasfl/filewatcher
Usage
FileWatcher.new(["lib/", "Rakefile"]).watch do |filename|
puts "Changed " + filename
end
I'm trying to write a Sinatra app that reads in a list from a file, and then spits back a random item from that list.
I'm having trouble figuring out the path to the file to read it, though. Sinatra says 'no such file or directory' when I try to load an item in my browser:
Errno::ENOENT at /wod
No such file or directory - http://localhost:4567/listing.txt
Here is the code:
require 'sinatra'
#list
get /item
puts read_list[rand(#list.size)]
end
def read_list
File.open('listing.txt', 'r').readlines
end
I have the file in /public, which the Sinatra README says is the default location for hosting static files. Furthermore, if I put it in /public I can navigate to localhost:4567/listing.txt and read the file in the browser.
A couple things I noticed:
get /item
isn't correct, it should be:
get '/item' do
If you start your code inside the same directory the Ruby code is in, the current working-directory will be ".", which is where Ruby will look when trying to:
File.open('listing.txt', 'r').readlines
Ruby will actually use './listing.txt' as the path. That's OK if you manually launch the code from the root directory of the application, but that doesn't work well if you try to launch it from anywhere else.
It's better to be explicit about the location of the file when you're actually trying to load something for use with a web server. Instead of relying on chance, there are a couple things you can do to help make it more bullet-proof. Consider this:
def read_list
running_dir = File.dirname(__FILE__)
running_dir = Dir.pwd if (running_dir == '.')
File.open(running_dir + '/public/listing.txt', 'r').readlines
end
File.dirname gets the path information from __FILE__, which is the absolute path and name of the current file running. If the application was started from the same directory as the file, that will be ., which isn't what we want. In that case, we want the absolute path of the current working-directory, which Dir.pwd returns. Then we can append that to the path of the file you want, from the root of the application.
You'll need to do File.read('public/listing.txt', 'r') to get what you want here.
File.open isn't part of Sinatra and doesn't know to look in a specific place for static files, so it just looks in the current working directory.
I'm trying to create an application that will primarily consist of ruby scripts that will be run from the command-line (cron, specifically). I want to have a libs folder, so I can put encapsulated, reusable classes/modules in there, and be able to access them from any script.
I want to be able to put my scripts into a "bin" folder.
What is the best way to give them access to the libs folder? I know I can add to the load path via command-line argument, or at the top of each command-line script. In PHP, it sometimes made more sense to create a custom .ini file and point the cli to the ini file, so you got them all in one pop.
Anything similar for ruby? Based on your experience, what's the best way to go here?
At the top of each bin/executable, you can put this at the top
#!/usr/bin/env ruby
$:.unshift(File.join(File.dirname(__FILE__), '..', 'lib')
require 'libfile'
[etc.]
Were you looking for something different?
If you turn your application into a Ruby gem and install the gem on your system, you don't even need to put this stuff at the top. The require statement would suffice in that case.
Sean,
There is no way to not have to require a library, that I know of. I guess if you want to personalize your Ruby so much you could "roll your own" using eval.
The script below basically works as the interpreter. You can add your own functions and include libraries. Give the file executable permissions and put it in /usr/bin if you really want. Then just use
$ myruby <source>
Here's the code for a very minimal one. As an example I've included the md5 digest library and created a custom function called md5()
#!/usr/bin/ruby -w
require 'digest/md5';
def executeCode(file)
handle = File.open(file,'r');
for line in handle.readlines()
line = line.strip();
begin
eval(line);
rescue Exception => e
print "Problem with script '" + file + "'\n";
print e + "\n";
end
end
end
def checkFile(file)
if !File.exists?(file)
print "No such source file '" + file + "'\n";
exit(1);
elsif !File.readable?(file)
print "Cannot read from source file '" + file + "'\n";
exit(1);
else
executeCode(file);
end
end
# My custom function for our "interpreter"
def md5(key=nil)
if key.nil?
raise "md5 requires 1 parameter, 0 given!\n";
else
return Digest::MD5.hexdigest(key)
end
end
if ARGV[0].nil?
print "No input file specified!\n"
exit(1);
else
checkFile(ARGV[0]);
end
Save that as myruby or myruby.rb and give it executable permissions (755). Now you're ready to create a normal ruby source file
puts "I will now generate a md5 digest for mypass using the md5() function"
puts md5('mypass')
Save that and run it as you would a normal ruby script but with our new interpreter. You'll notice I didn't need to include any libraries or write the function in the source code because it's all defined in our interpreter.
It's probably not the most ideal method, but it's the only one I can come up with.
Cheers
There is a RUBYLIB environment variable that can be set to any folder on the system
If you want to use your classes/modules globally, why not just move them to your main Ruby lib directory? eg: /usr/lib/ruby/1.8/ ?
Eg:
$ cat > /usr/lib/ruby/1.8/mymodule.rb
module HelloWorld
def hello
puts("Hello, World!");
end
end
We have our module in the main lib directory - should be able to
require it from anywhere in the system now.
$ irb
irb(main):001:0> require 'mymodule'
=> true
irb(main):002:0> include HelloWorld
=> Object
irb(main):003:0> hello
Hello, World!
=> nil
I'm working on script right now which has to run each ruby script in a directory and its subfolders.
e.g.
run-all.rb
- scripts
- folder1
- script1.rb
- script2.rb
- folder2
- script3.rb
- script4.rb
As the server is a Windows server I would normally use a batch file but the head dev insists everything must be done in ruby as some members have Macs and may not understand Windows Batch Files.
As the question may have given away, my knowledge of Ruby is very basic.
Depends what you mean by "run". To just execute the code that is in each script within the same ruby process, this will do the trick:
Dir["scripts/**/*.rb"].each{|s| load s }
But it you want to run each script in it's own ruby process, then try this:
Dir["scripts/**/*.rb"].each{|s| puts `ruby #{s}` }
Just put the either of these in the contents of run-all.rb and the run ruby run-all.rb form the command line.
Something like this should probably work:
def process_directory(basedir)
puts basedir
Find.find(basedir.chomp) do |path|
if FileTest.directory?(path)
if File.basename(path)[0] == ?.
Find.prune # Don't look any further into this directory.
else
next
end
else
puts path
end
end