I am using Julia to combine information from a combination of sources and generate a (rather lengthy) string that is a call to an external program. I can generate a String containing the text that I would type into the shell but I can’t work out how to turn that into a Cmd to call with run. I curre…

If you need to run it in the shell then run(`sh -c $cmd`) is best (where cmd is a String variable) If you just need to pass multiple arguments, then call just run(cmd), where cmd is built up from interpolating other Cmd objects and arrays of Strings.

Unfortunately the first version doesn’t work because the contents of $cmd are enclosed in double quotes. To the shell, it looks like one long file name. I want to run myprog --a=optiona --b=="option b" file1 file2 not "myprog --a=optiona --b==\"option b\" file1 file2" It seems that I will need…

[image] Douglas Bates: myprog --a=optiona --b=="option b" file1 file2 The right way to do this is to avoid the shell completely. e.g. suppose you have an array filenames of filenames strings and an array options with the option strings. You would construct the command to run by, for example…

Thank you, @stevengj . I’ll let that be a lesson to myself to always give an example of what I am trying to accomplish. It is all working well now.

Also note that writing a command literal (inside backticks) will also work. Here cmd1 and cmd2 are equivalent: cmd1 = `myprog --a=optiona --b="option b" file1 file2` options = ["--a=optiona", "--b=option b"] filenames = ["file1", "file2"] cmd2 = `myprog $options $filenames`

Simply create an array with the command and its arguments, then pass this array to the command object and run the command using run() function. x = ["ls", "-la"] cmd = `$x` run(cmd) if you want to run a string as a command, then first split the string and collect it and assign the ‘x’ (above) to t…

Is there a simple way to run a command from a string and get the output as a string ? Something like cmd = "ls *" out = readstring(`$cmd`) but that works. I managed to get something working by copying and modifying Base.repl_cmd but it’s quite ugly and complicated. And I don’t want to do any inter…

[image] GitHub - innerlee/Shell.jl: Run shell commands becomes easy in Julia! Run shell commands becomes easy in Julia! Contribute to innerlee/Shell.jl development by creating an account on GitHub. It need some upgrade work, though.

To read the output of an an external program as a string, simply do e.g.: read(`ls`, String) If by “command” you mean “shell command”, e.g. "ls *" is a shell command if you want * to be interpreted as a glob metacharacter, then you need to run it with a shell, e.g.: shellcmd = "ls *" read(`sh -c …

Create a Cmd from a String

General Usage

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Create a Cmd from a String

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