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https://github.com/mslinn/insert_after
Inserts a line into a file after a line matching a regular expression.
https://github.com/mslinn/insert_after
bash ruby
Last synced: about 2 months ago
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Inserts a line into a file after a line matching a regular expression.
- Host: GitHub
- URL: https://github.com/mslinn/insert_after
- Owner: mslinn
- License: mit
- Created: 2023-11-10T15:32:22.000Z (about 1 year ago)
- Default Branch: master
- Last Pushed: 2023-11-10T23:32:08.000Z (about 1 year ago)
- Last Synced: 2024-10-12T09:45:23.531Z (3 months ago)
- Topics: bash, ruby
- Language: Ruby
- Homepage: https://rubygems.org/gems/insert_after
- Size: 19.5 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
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README
# `Insert_after` [](https://badge.fury.io/rb/insert_after)
Inserts a line into a file after a line matching a regular expression.
String comparisons are case-insensitive.
Works on very large files because it reads the file line by line instead of reading the entire file into memory.
Can be used on the command line or in a Ruby program.
## Command-line Installation
```ruby
$ gem install insert_after
```
## Installation For Use In a Ruby Program
Either add this line to your application’s `Gemfile`:
```ruby
gem 'insert_after'
```
... or add the following to your application’s `.gemspec`:
```ruby
spec.add_dependency 'insert_after'
```
And then execute:
```shell
$ bundle
```
## Command-line Usage
```shell
# Inserts 'Inserted 1' after the first line containing 'line' into demo/my_file.txt:
$ insert_after line 'Inserted 1' demo/my_file.txt
# Inserts 'Inserted 1' after every line containing 'line' into demo/my_file.txt:
$ insert_after -a line 'Inserted 1' demo/my_file.txt
# Inserts an empty line after the first line containing 'line 1' into demo/my_file.txt:
$ insert_after 'line 1' '' demo/my_file.txt
# Inserts an empty line after every line containing 'line 1' into demo/my_file.txt:
$ insert_after -a 'line 1' '' demo/my_file.txt
# Inserts 'Inserted 2' after the first line starting with 'line 2' into demo/my_file.txt:
$ insert_after '^line 2' 'Inserted 2' demo/my_file.txt
# Inserts 'Inserted 2' after every line starting with 'line 2' into demo/my_file.txt:
$ insert_after -a '^line 2' 'Inserted 2' demo/my_file.txt
# Inserts 'Inserted 3' after the first line containing an 'e' followed by a '2' into demo/my_file.txt:
$ insert_after 'e.*2' 'Inserted 3' demo/my_file.txt
# Inserts 'Inserted 3' after every line containing an 'e' followed by a '2' into demo/my_file.txt:
$ insert_after -a 'e.*2' 'Inserted 3' demo/my_file.txt
```
## Ruby Program Usage
The `demo/demo.rb` program is an example of how to use `insert_after` in a Ruby program:
```ruby
require 'insert_after'
InsertAfer.insert_after 'line 2', 'New line', 'my_file.txt'
InsertAfter.insert_after 'line', 'Another line from Ruby', 'my_file.txt', all: true
```
## Development
After checking out this git repository, install dependencies by typing:
```shell
$ bin/setup
```
You should do the above before running Visual Studio Code.
### Run the Tests
```shell
$ bundle exec rspec
```
### Interactive Session
The following will allow you to experiment:
```shell
$ bin/console
```
### Local Installation
To install this gem onto your local machine, type:
```shell
$ bundle exec rake install
```
### To Release A New Version
To create a git tag for the new version, push git commits and tags,
and push the new version of the gem to https://rubygems.org, type:
```shell
$ bundle exec rake release
```
## Contributing
Bug reports and pull requests are welcome at https://github.com/mslinn/insert_after.
## License
The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).