Fancy alternative for old good test command.

var=123

if is equal $var 123.0; then
    echo "it just works"
fi

if is not a substring $var "foobar"; then
    echo "and it's easy to read"
fi

In order to use is.sh you can install it with one of following 1-liners:

# Unix-like
$ sudo sh -c 'cd /usr/local/bin && wget raw.githubusercontent.com/qzb/is.sh/latest/is.sh -O is && chmod +x is'

# NPM
$ npm install -g is.sh

If you don't want to install is.sh system-wide you can just download it and source it from your script:

$ wget raw.githubusercontent.com/qzb/is.sh/latest/is.sh
$ source ./is.sh

• is equal $valueA $valueB - checks if values are the same or if they are equal numbers
• is matching $regexp $value - checks if whole value matches to regular expression
• is substring $valueA $valueB - checks if first value is a part of second one
• is empty $value - checks if value is empty
• is number $value - checks if value is a number
• is gt $numberA $numberB - true if first number is greater than second one
• is lt $numberA $numberB - true if first number is less than second one
• is ge $numberA $numberB - true if first number is greater than or equal to second one
• is le $numberA $numberB - true if first number is less than or equal to second one
• is file $path - checks if it is a file
• is dir $path - checks if it is a directory
• is link $path - checks if it is a symbolic link
• is existent $path - checks if there is a file or directory or anything else with this path
• is readable $path - checks if file is readable
• is writeable $path - checks if file is writeable
• is executable $path - checks if file is executable
• is available $command - checks if given command is available
• is older $pathA $pathB - checks if first file is older than second one
• is newer $pathA $pathB - checks if first file is newer than second one
• is true $value - true if value is equal "true" or "0"
• is false $value - opposite of is true $value

You can negate any condition by putting not in front of it.

$ is number "abc" && echo "number"
$ is not number "abc" && echo "not a number"
not a number

You can add a, an, and the articles before condition name.

$ is a number 5
$ is not a substring abc defghi

MIT