How to run a command on windows using Ruby

Question

I used some code from a github based which is used to handle testing and compiling of code. In it there is an extension to the command available to Ceedling (The test harness that I will be using) which uses Ruby in a file called "rakefile.rb".

I am trying to run the following command:

desc "Convert the output binary to a hex file"
task :convert => :release do
  cmd = "\"C:/Program Files (x86)/Microchip/xc16/v1.23/bin\"\\\\xc16-bin2hex ./build/release/Output.elf -a -omf=elf"
  puts "Generating Output.hex..."
  puts cmd
  sh cmd
end

If I put the code, below, in to my "Start Command Prompt With Ruby" program, then the output is correct and the action is taken:

"C:/Program Files (x86)/Microchip/xc16/v1.23/bin"\\xc16-bin2hex ./build/release/Output.elf -a -omf=elf

If I don't include the \" and the \'s then the program will not work.

At present I get the output:

Generating Output.hex...
"C:/Program Files (x86)/Microchip/xc16/v1.23/bin"\\xc16-bin2hex ./build/release/Output.elf -a -omf=elf
rake aborted!
Command failed with status (127): ["C:/Program Files (x86)/Microchip/xc16/v1....]
rakefile.rb:16:in `block in <top (required)>'
C:/Ruby24-x64/bin/ceedling:23:in `load'
C:/Ruby24-x64/bin/ceedling:23:in `<main>'
Tasks: TOP => convert
(See full trace by running task with --trace)

What am I doing wrong and where can I read more about the basics of Ruby?

first step would be to run it with the --trace flag as the error message suggests. If I had to guess I'd say it's an issue with the file path and escape characters i.e. forward slashes vs back slashes — ConorSheehan1
– ConorSheehan1, Commented Jun 7, 2018 at 14:30
Shouldn't the file path use backslashes for windows? i.e C:\Program Files (x86)\Microchip\xc16\v1.23\bin Or are you using cygwin or some other unix like terminal? — ConorSheehan1
– ConorSheehan1, Commented Jun 7, 2018 at 14:33
How do i use the trace facility? I have tried Ceedling convert --trace and all the combinations of that but it's not recognized Also using the backslashes makes no difference to the output. I am using Command Prompt with Ruby — GMoney
– GMoney, Commented Jun 7, 2018 at 14:35
I'm not sure what Ceedling is, but this looks like a rake task, so I'd use bundle exec rake $your_task_name --trace or drop the bundle exec portion if you aren't using bundler — ConorSheehan1
– ConorSheehan1, Commented Jun 7, 2018 at 14:38
Ceedling does use rake. I get 'exec is not recognized as an internal or external command, operable program or batch file' It can't locate a bundle — GMoney
– GMoney, Commented Jun 7, 2018 at 14:40

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

From the error you posted in the chat it looks like the root issue is the rake task not finding sh,
which is an executable that runs a linux shell scripting language.

I'd say the easiest option is to either

install sh on windows via cygwin, mingw or gitbash (see this answer)

or
Run linux on a vm or container

edited Jun 20, 2020 at 9:12

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answered Jun 7, 2018 at 15:51

ConorSheehan1

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