hostcraft

A fast, cross-platform CLI for managing your system hosts file — add, remove, toggle, and list host entries directly from your terminal without ever manually editing the file.

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Ecosystem

Crate	Description	Status
hostcraft-core	Shared library	✅ Published
hostcraft-cli	Terminal interface (this crate)	✅ Active
hostcraft-gui	Desktop GUI (Tauri)	🚧 Planned

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Features

• List all host entries with colour-coded active/inactive status
• Add a new entry with an IP address and hostname
• Remove entries by full or partial name match
• Toggle entries on/off without deleting them
• Entries are never silently lost — disabled entries are preserved as commented-out lines
• Duplicate entry detection — adding the same IP + hostname twice is rejected
• IPv4 and IPv6 support
• Cross-platform — works on macOS, Linux, and Windows
• Coloured, aligned terminal output powered by anstyle
• Friendly error messages with platform-specific permission hints

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Installation

From crates.io (recommended)

cargo install hostcraft-cli

This compiles the binary and places it in ~/.cargo/bin/, which is on your PATH by default after a standard Rust install. Once done, hostcraft is available globally from any directory.

From source

git clone https://github.com/Zaberahmed/hostcraft.git
cd hostcraft
cargo install --path cli

Verify the install

hostcraft --version

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Quick Start

# See all current entries in your hosts file
hostcraft list

# Add a new entry
sudo hostcraft add myapp.local 127.0.0.1

# Disable it temporarily without removing it
sudo hostcraft toggle myapp.local

# Remove it entirely
sudo hostcraft remove myapp.local

Why sudo? Your system hosts file is a protected system file. Reading it works without elevated privileges, but any command that writes — add, remove, toggle — requires sudo on macOS/Linux or running as Administrator on Windows.

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Commands

list

Prints all entries in your hosts file with colour-coded status.

hostcraft list

Output:

  127.0.0.1            localhost                      ● Active
  255.255.255.255      broadcasthost                  ● Active
  ::1                  localhost                      ● Active
  127.0.0.1            myapp.local                    ○ Inactive

• ● green — entry is active and in effect
• ○ red/dimmed — entry is inactive (commented out in the hosts file)

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add <name> <ip>

Adds a new active entry. The entry is immediately written to the hosts file.

sudo hostcraft add myapp.local 127.0.0.1
sudo hostcraft add staging.myapp.com 192.168.1.50
sudo hostcraft add mysite.local ::1          # IPv6

Adding a duplicate (same IP and same hostname) is rejected with an error — the file is left unchanged.

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remove <name>

Removes all entries whose hostname contains the given string. Supports partial matches.

# Remove an exact hostname
sudo hostcraft remove myapp.local

# Remove all entries matching a substring
sudo hostcraft remove myapp      # removes myapp.local, myapp.dev, etc.

Returns an error if no matching entry is found.

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toggle <name>

Flips matching entries between active and inactive without removing them. Useful for temporarily disabling a host without losing it.

sudo hostcraft toggle myapp.local

# Before:   127.0.0.1 myapp.local
# After:  # 127.0.0.1 myapp.local

sudo hostcraft toggle myapp.local

# Before: # 127.0.0.1 myapp.local
# After:    127.0.0.1 myapp.local

Supports partial name matching — hostcraft toggle myapp toggles all entries whose hostname contains "myapp".

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Options

Flag	Default	Description
--file <path>	Platform default (see below)	Override the hosts file path
--help	—	Print help for the command or subcommand
--version	—	Print the installed version

Default hosts file path

Platform	Path
macOS / Linux	/etc/hosts
Windows	C:\Windows\System32\drivers\etc\hosts

Overriding the path

The --file flag is useful for testing against a copy without touching your real hosts file:

hostcraft --file ./hosts-copy list
hostcraft --file ./hosts-copy add myapp.local 127.0.0.1

Note: --file must come before the subcommand.

✅  hostcraft --file ./hosts-copy list
❌  hostcraft list --file ./hosts-copy

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Permissions

Writing to the system hosts file requires elevated privileges on all platforms.

macOS / Linux

Prefix write commands with sudo:

sudo hostcraft add myapp.local 127.0.0.1
sudo hostcraft remove myapp.local
sudo hostcraft toggle myapp.local

list does not require sudo:

hostcraft list

Windows

Run your terminal (Command Prompt or PowerShell) as Administrator, then use hostcraft normally without any prefix:

hostcraft add myapp.local 127.0.0.1
hostcraft remove myapp.local
hostcraft toggle myapp.local

If you forget, hostcraft will tell you:

✗ Error: Permission denied: run as Administrator to modify 'C:\Windows\System32\drivers\etc\hosts'

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Development

Prerequisites

• Rust (2024 edition or later)

Build from source

git clone https://github.com/Zaberahmed/hostcraft.git
cd hostcraft

# Build the entire workspace
cargo build

# Run directly without installing
cargo run --bin hostcraft -- list
cargo run --bin hostcraft -- add myapp.local 127.0.0.1
cargo run --bin hostcraft -- --file ./cli/hosts-copy list

Re-installing after changes

If you've installed via cargo install and made local changes, reinstall to pick them up:

cargo install --path cli --force

Project structure

hostcraft/
├── core/                  # hostcraft-core — shared library
│   └── src/
│       ├── host/          # HostEntry, HostStatus, HostError + operations
│       │   ├── mod.rs     # Public API: parse_contents, add_entry, remove_entry, toggle_entry
│       │   └── utils.rs   # Internal: parse_line, is_duplicate_entry
│       └── file/          # File I/O
│           ├── mod.rs     # Public API: read_file, write_file
│           └── utils.rs   # Internal: write_entries
│
└── cli/                   # hostcraft-cli — this crate
    └── src/
        ├── main.rs        # Entry point — parses args, delegates to run()
        ├── command.rs     # CLI definition (Cli, Command) + run() dispatch
        └── display.rs     # Coloured output — styles and print functions

Running tests

# Run all tests across the workspace
cargo test

# Run only core library tests
cargo test -p hostcraft-core

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License

MIT — see LICENSE for details.