is.sh
A human-readable alternative to the test command for writing clear conditions in bash scripts.
What is is.sh?
is.sh is a bash scripting tool that provides a human-readable alternative to the traditional test command. It allows developers to write conditional expressions using plain English phrases, making scripts more intuitive and easier to understand. The tool solves the problem of cryptic and error-prone syntax in bash conditionals by offering a clear, natural language interface.
Bash script developers, system administrators, and DevOps engineers who write or maintain shell scripts and want to improve code readability and reduce syntax errors.
Developers choose is.sh because it dramatically improves the clarity of bash scripts, making conditions self-documenting and easier to debug. Its simple, natural language approach reduces the learning curve and minimizes mistakes compared to traditional test command syntax.
Overview
Human readable conditions for bash 👌
Use Cases
Best For
- Writing clear and maintainable bash scripts
- Improving readability of complex conditional logic
- Reducing syntax errors in shell script conditions
- Teaching bash scripting with intuitive examples
- Automating system tasks with self-documenting code
- Replacing cryptic test command flags in existing scripts
Not Ideal For
- Scripts requiring strict POSIX compliance or portability across different shells
- Environments with minimal dependencies where installing external tools is prohibited
- High-frequency loops where performance overhead from external calls is unacceptable
Pros & Cons
Pros
Uses plain English phrases like `is equal` and `is file`, making conditions self-documenting and reducing syntax errors, as shown in the example code where `if is equal $var 123.0` replaces cryptic test flags.
Supports negation with `not` and optional articles (`a`, `an`, `the`), allowing for readable and fluent script conditions, as demonstrated in usage examples like `is not a substring`.
Includes various file system conditions such as `is file`, `is dir`, `is readable`, and `is newer`, covering common tasks listed in the usage section for robust script automation.
Offers multiple installation methods, including direct download via wget, npm, and local sourcing, as per the installation guide, making it accessible for different workflows.
Cons
Only provides basic conditional checks and lacks support for complex arithmetic, array operations, or advanced string manipulations that native bash expressions can handle, as evident from the simple condition list.
Requires installation or sourcing, adding an extra step and potential point of failure in scripts meant to be portable or run in isolated environments, unlike built-in bash commands.
Each condition call invokes an external script or function, which can be slower than using native bash test operators like `[ ]` or `[[ ]]`, especially in loops or performance-critical scripts.
Frequently Asked Questions
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