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run

run(command)

Run a command object, constructed with backticks. Throws an error if anything goes wrong, including the process exiting with a non-zero status.

Examples

julia> run(`echo hello`)
hello

julia> run(`echo "hello"`)
hello

julia> run(`echo (hello)`)
(hello)

julia> run(`ls`)
file1.txt
file2.txt
file3.txt

Here are some common examples of its use:

1. Run a command and display output:

   julia> run(`echo "Hello, Julia!"`)
   Hello, Julia!

   This example runs the echo command with the argument "Hello, Julia!" and displays the output.

2. Execute a system command:

   julia> run(`git status`)
   On branch master
   Your branch is up to date with 'origin/master'.
   
   nothing to commit, working tree clean

   In this example, the git status command is executed, and the output is displayed.

3. Throw an error if command fails:

   julia> run(`false`)
   ERROR: failed process: Process(`false`, ProcessExited(1)) [1]

   When a command fails, such as running the false command, an error is thrown.

Common mistake example:

julia> run("echo 'Hello, Julia!'")
ERROR: MethodError: no method matching run(::String)

In this example, the run function is incorrectly used with a string argument instead of a command object constructed with backticks. It's important to construct the command with backticks (`) to create a command object before passing it torun`.

See Also

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