RuntimeError when running script?

Question

So I have found this RUBY script, which looks for all PNG images in sub folders and folders and converts PNG images using TinyPNG API but for some reason I get runtime error

C:/Users/Vygantas/Desktop/tinypng.rb:14:in `': Usage: ./tinypng.rb C:/Users/Vygantas/Desktop/product C:/Users/Vygantas/Desktop/product(RuntimeError)

#!/usr/bin/ruby -w

#
# tinypng.rb — Placed into the public domain by Daniel Reese.
#

require 'rubygems'
require 'json'

# Set API key.
apikey = "xxxxxxxxxxxxxxxx"

# Verify arguments.
ARGV.length == 2 or fail("Usage: ./tinypng.rb C:\Users\Vygantas\Desktop\product C:\Users\Vygantas\Desktop\product*emphasized text*")
src = ARGV[0]
dst = ARGV[1]
File.exist?(src) or fail("Input folder does not exist: " + src)
File.exist?(dst) or fail("Output folder does not exist: " + dst)

# Optimize each image in the source folder.
Dir.chdir(src)
Dir.glob('*.png') do |png_file|
    puts "\nOptimizing #{png_file}"

    # Optimize and deflate both images.
    cmd = "curl -u api:#{apikey} --data-binary @#{png_file} 'https://api.tinypng.com/shrink'"
    puts cmd
    r = JSON.parse `#{cmd}`
    if r['error']
        puts "TinyPNG Error: #{r['message']} (#{r['error']})"
        exit(1)
    end
    url = r['output']['url']
    cmd = "curl '#{url}' -o #{dst}/#{png_file}"
    puts cmd
    `#{cmd}`
end
Dir.chdir("..")

puts 'Done'

I need whole error message and backtrace to debug this error. — Marek Lipka
– Marek Lipka, Commented May 14, 2015 at 7:48
@MarekLipka Of course you don’t need it. Take a precise look: it’s a script who prints it because an expectation on amount of arguments was not met :) — Aleksei Matiushkin
– Aleksei Matiushkin, Commented May 14, 2015 at 7:49

Aleksei Matiushkin · Accepted Answer · 2015-05-14 08:02:06Z

1

As you might see in the code, line 14 (as printed on script execution):

ARGV.length == 2 or fail("Usage: ./tinypng.rb 
    C:\...\product C:\...\product*emphasized text*")

That said, a script requires two parameters to run. Let me guess: you did not pass two parameters. Those are btw source and destination folders.

answered May 14, 2015 at 8:02

Aleksei Matiushkin

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6 Comments

Vygantas Over a year ago

If I change to ARGV.length == 2 or fail("Usage: "./tinypng.rb", "/product", "/product"") I get: C:/Users/x/Desktop/tinypng.rb:14: syntax error, unexpected tSTRING_BEG, e xpecting keyword_do or '{' or '(' ...age: "./tinypng.rb", "/product", "/product"")

Aleksei Matiushkin Over a year ago

You have to specify arguments to a script, you are not supposed to modify the script itself. Like this (in console): ./tinypng.rb C:/Users/Vygantas/Desktop/product C:/Users/Vygantas/Desktop/productModified. NB Source and destination folder should likely differ.

Vygantas Over a year ago

I am an idiot! Still, looks like it is broken :/ Optimizing textpicture.png curl -u api:cfgibsPM-f_7ETa9jgv_WkONlpEGsU920 --data-binary @textpicture.png 'api.tinypng. om/shrink' C:/Users/Vygantas/Desktop/tinypng.rb:28:in ``': No such file or directory - cur -u api:cfgibsPM-f_7ETa9jgv_WkONlpEGsU920 --data-binary @textpicture.png 'api.tinypng.com hrink' (Errno::ENOENT) from C:/Users/Vygantas/Desktop/tinypng.rb:28:in block in <main>' from C:/Users/Vygantas/Desktop/tinypng.rb:22:in glob' from C:/Users/Vygantas/Desktop/tinypng.rb:22:in `<main>'

Aleksei Matiushkin Over a year ago

Install curl on the target machine? Whether it’s Ubuntu, run sudo aptitude install curl.

Vygantas Over a year ago

Now just says done and no files are outputed, anyway, thanks for help

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