For this assignment a simple and naive version of sed will be created.
This requirements will be:
- Only the substitution command is required.
- Create a command line utility that accepts options and arguments.
- The first argument will be the command and the second one will be the file.
- Check if the file specified exists.
- Check if the substitution command is valid.
- Implement the -n option, which prevents a line from being printed unless specified by ‘p’.
- Implement the -i [extension] which tells sed to edit the file instead of printing to the standard output.
- A copy of the original should be saved in [file_name].[extension]
- Multiple substitution commands should be accepted with the -e option, with one command per -e appearance.
- When the -n option appears, the line should not be printed to the standard output unless specified.
- The -f [script-file] option should expect a file which consists of several lines containing one command each.
- Implement the p flag which tells that the line should be printed.
- Implement the g flag which tells that all occurrences of the search should be replaced on the line. By default only the first occurrence of each line is replaced.
Operating system: Ubuntu 20.04.2 LTS Node: v14.17.4 npm: 6.14.14
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Download the repository and within it run
npm install -
Or install the package from npm with
npm install sedclone -g
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If you downloaded the repository then you can use it with
node index.js --help -
If you installed globally from npm then you can use
sedclone --help