### Example: Install and Launch Clack

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

Demonstrates installing the 'clack' library and launching its 'clackup' script using 'ros exec'.

```bash
$ ros install clack
found system clack.
Attempting install scripts...
/Users/nitro_idiot/.roswell/bin/clackup
$ ros exec clackup                                                ### launch the web server!
```

--------------------------------

### Installing Latest Dependencies with Roswell

Source: https://roswell.github.io/Travis-CI.html

Demonstrates how to install the latest versions of libraries directly from GitHub using `ros install` within the `install` section of .travis.yml. This is useful for libraries not yet available on Quicklisp.

```yaml
install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh
+  # Using the latest fast-http and quri
+  - ros install fukamachi/fast-http
+  - ros install fukamachi/quri
```

--------------------------------

### Launch Emacs with SLIME Setup

Source: https://roswell.github.io/Initial-Recommended-Setup.html

This command launches Emacs with SLIME already set up, providing a convenient way to start your Lisp development session.

```bash
ros emacs
```

--------------------------------

### Install Scripts from Quicklisp or GitHub

Source: https://roswell.github.io/Home.html

Install programs or scripts using 'ros install'. This can be from Quicklisp or directly from a GitHub repository.

```bash
$ ros install qlot            # will install a program from quicklisp
$ ros install fukamachi/qlot  # will install it from the GitHub


```

--------------------------------

### View Install Options for an Implementation

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Access detailed information and compile options for installing a specific Lisp implementation, such as SBCL, by using 'ros help install [impl]'.

```bash
$ ros help install sbcl
```

--------------------------------

### Python pip install and command execution

Source: https://roswell.github.io/How-to-distribute-your-software%2C-not-library%2C-on-Quicklisp-ala-python-pip.html

Demonstrates how Python's pip installs packages and how installed software can be executed directly from the command line.

```bash
$ pip3 install --user cfncluster
Requirement already satisfied:   ....
$ cfncluster 
usage: cfncluster [-h] [--config CONFIG_FILE] [--region REGION] [--nowait] 
                  {create,update,delete,start,stop,status,list,instances,configure,version}
                  ...
cfncluster: error: too few arguments
```

--------------------------------

### Manage Multiple Lisp Installations

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Install various Lisp implementations and list specific installed versions. Use 'ros install' for default or specific versions and 'ros list installed [impl]' to filter.

```bash
$ ros install sbcl-bin      # default sbcl
```

```bash
$ ros install sbcl          # The newest released version of sbcl
```

```bash
$ ros install ccl-bin       # default prebuilt binary of ccl
```

```bash
$ ros install sbcl/1.2.0    # A specific version of sbcl
```

```bash
$ ros list installed sbcl   # Listing the installed implementations
```

--------------------------------

### Install Roswell on FreeBSD (System-wide)

Source: https://roswell.github.io/Installation.html

Install Roswell system-wide on FreeBSD by navigating to the ports directory and running make install.

```bash
$ cd /usr/ports/devel/roswell 
$ sudo make install

```

--------------------------------

### Install and Execute Roswell Scripts

Source: https://roswell.github.io/How-to-distribute-your-software%2C-not-library%2C-on-Quicklisp-ala-python-pip.html

Demonstrates how to install a script from Quicklisp or GitHub and then execute it using Roswell commands.

```shell
# install from quicklisp
$ ros install prove

# or fetch from the latest github repository [accountname]/[repo]
$ ros install fukamachi/prove

# launch ~/.roswell/bin/run-prove
$ ros exec run-prove

# Alternatively:
$ PATH=~/.roswell/bin:$PATH
$ which run-prove
/home/guicho/.roswell/bin/run-prove
$ run-prove
```

--------------------------------

### Install Scripts with Roswell

Source: https://roswell.github.io/

Roswell can install scripts directly from Quicklisp or GitHub using the 'ros install' command. Ensure roswell scripts (files with .ros extensions) are placed in a 'roswell' subdirectory for system-wide installation.

```bash
$ ros install qlot            # will install a program from quicklisp
$ ros install fukamachi/qlot  # will install it from the GitHub
```

--------------------------------

### Install a Library via Roswell

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

Use this command to install a library from Quicklisp that provides Roswell scripts. The scripts will be copied to ~/.roswell/bin.

```bash
$ ros install <library name>
```

--------------------------------

### Install and Use Roswell Scripts for Testing

Source: https://roswell.github.io/Travis-CI.html

Install specific Roswell commands like `prove` using `ros install prove` and ensure `~/.roswell/bin` is in your PATH. Then, use commands like `run-prove` for testing.

```yaml
language: common-lisp
sudo: required

env:
  global:
    - PATH=~/.roswell/bin:$PATH       # !!! IMPORTANT !!!
  matrix:
    - LISP=sbcl-bin
    - LISP=ccl-bin
    - LISP=abcl
    - LISP=clisp
    - LISP=ecl

matrix:
  allow_failures:
    - env: LISP=clisp

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh
+  - ros install prove

script:
-  - ros -s prove -e '(or (prove:run :quri-test) (uiop:quit -1))'
+  - run-prove quri-test.asd
```

--------------------------------

### Install Roswell from Debian Package

Source: https://roswell.github.io/Installation.html

Install Roswell on Ubuntu/Debian systems by downloading and installing a .deb package.

```bash
$ curl -L https://github.com/roswell/roswell/releases/download/v19.08.10.101/roswell_19.08.10.101-1_amd64.deb --output roswell.deb
$ sudo dpkg -i roswell.deb

```

--------------------------------

### Install Common Lisp Implementations

Source: https://roswell.github.io/

Use the 'ros install' command to manage Common Lisp implementations. You can install default versions, the latest released versions, specific versions, or prebuilt binaries. Use 'ros list installed [implementation]' to check installed versions and 'ros use [implementation]' to set the default.

```bash
$ ros install               # displays a list of all installable implementations

$ ros install sbcl-bin      # default sbcl
$ ros install sbcl          # The newest released version of sbcl
$ ros install ccl-bin       # default prebuilt binary of ccl
$ ros install sbcl/1.2.0    # A specific version of sbcl

$ ros list installed sbcl   # Listing the installed implementations
$ ros run -- --version      # check which implementation is used
SBCL 1.2.15
$ ros use sbcl/1.2.3        # change the default implementation
```

--------------------------------

### Install SBCL from Source

Source: https://roswell.github.io/Initial-Recommended-Setup.html

Run this command to install SBCL by compiling it from source code, which may be necessary for certain features like jumping to implementation source code.

```bash
ros install sbcl
```

--------------------------------

### Advanced .travis.yml for Multiple Lisp Implementations

Source: https://roswell.github.io/Travis-CI.html

An advanced .travis.yml setup for comprehensive testing. It configures Roswell to use multiple Lisp implementations, installs project dependencies, and allows specific implementations to fail.

```yaml
language: common-lisp
sudo: false

addons:
  apt:
    packages:
      - libc6-i386

env:
  global:
    - PATH=~/.roswell/bin:$PATH
    - ROSWELL_INSTALL_DIR=$HOME/.roswell
  matrix:
    - LISP=sbcl-bin
    - LISP=ccl-bin
    - LISP=abcl
    - LISP=clisp
    - LISP=ecl
    - LISP=cmucl
    - LISP=alisp

matrix:
  allow_failures:
    - env: LISP=clisp
    - env: LISP=abcl
    - env: LISP=ecl
    - env: LISP=cmucl
    - env: LISP=alisp

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh
  - ros install prove
  - ros install fukamachi/fast-http
  - ros install fukamachi/quri

cache:
  directories:
    - $HOME/.roswell
    - $HOME/.config/common-lisp

script:
  - run-prove quri-test.asd
```

--------------------------------

### Local Roswell Installation

Source: https://roswell.github.io/Local-installation.html

Clone the Roswell repository, bootstrap, configure with a local prefix, and install without sudo. Execute the installed binary from the specified local bin directory.

```bash
git clone -b release https://github.com/roswell/roswell.git
cd roswell
sh bootstrap
./configure --prefix=$HOME/.local/
make && make install              ### in this case, no sudo is required!
~/.local/bin/ros

```

--------------------------------

### Launch Roswell Shell

Source: https://roswell.github.io/How-to-setup-a-lisp-dev-environment-on-windows-with-Roswell.html

Execute this command in your command prompt to start the Roswell shell. Roswell will then prompt to install MSYS2 and launch its bash environment.

```shell
ros shell
```

--------------------------------

### Install Roswell with xbps (Void Linux)

Source: https://roswell.github.io/Installation.html

Install Roswell on Void Linux using the xbps package manager.

```bash
$ sudo xbps-install -S roswell

```

--------------------------------

### Install Roswell on FreeBSD (User-local)

Source: https://roswell.github.io/Installation.html

Install Roswell locally for a specific user on FreeBSD by defining a PREFIX variable.

```bash
$ cd /usr/ports/devel/roswell
$ sudo make PREFIX=/usr/home/<username>/.local install 

```

--------------------------------

### Installation on FreeBSD

Source: https://roswell.github.io/Installation.html

Installs Roswell on FreeBSD, including setting library and include search paths for the configure script.

```bash
sudo pkg install git automake curl
LDFLAGS="-L/usr/local/lib/" CFLAGS="-I/usr/local/include/" ./configure

```

--------------------------------

### Install Roswell with Scoop (Windows)

Source: https://roswell.github.io/Installation.html

Install Roswell on Windows using the Scoop package manager.

```bash
$ scoop install roswell

```

--------------------------------

### Project Structure Example

Source: https://roswell.github.io/FAQ.html

Illustrates the directory structure for placing private subprojects relative to the main project.

```text
+ projects/
  + main.ros
  + src/
  + t/
  + subproj1/
  + subproj2/   ;; or
  + local-projects/
    + subproj1/
    + subproj2/
```

--------------------------------

### System-wide Installation on Debian/Ubuntu

Source: https://roswell.github.io/Installation.html

Installs Roswell system-wide on Debian-based systems. Ensure build tools and dependencies are installed before cloning and building.

```bash
sudo apt-get -y install git build-essential automake libcurl4-openssl-dev
git clone -b release https://github.com/roswell/roswell.git
cd roswell
sh bootstrap
./configure
make
sudo make install
ros setup

```

--------------------------------

### Set ROSWELL_HOME Environment Variable

Source: https://roswell.github.io/Initial-Recommended-Setup.html

To use a different directory for Roswell's configuration and installations instead of ~/.roswell, set the ROSWELL_HOME environment variable before running `ros setup`.

```bash
export ROSWELL_HOME=/tmp
```

```bash
ros setup # will create /tmp/.roswell and install files there instead of ~/.roswell
```

--------------------------------

### Install Common Lisp Implementations

Source: https://roswell.github.io/Home.html

Use 'ros install' to manage Common Lisp implementations. You can install default versions, the latest releases, specific versions, or prebuilt binaries.

```bash
$ ros install               # displays a list of all installable implementations

$ ros install sbcl-bin      # default sbcl
$ ros install sbcl          # The newest released version of sbcl
$ ros install ccl-bin       # default prebuilt binary of ccl
$ ros install sbcl/1.2.0    # A specific version of sbcl

$ ros list installed sbcl   # Listing the installed implementations
$ ros run -- --version      # check which implementation is used
SBCL 1.2.15
$ ros use sbcl/1.2.3        # change the default implementation


```

--------------------------------

### Install Roswell with Homebrew

Source: https://roswell.github.io/Installation.html

Use Homebrew to install Roswell on macOS and Linux systems.

```bash
$ brew install roswell

```

--------------------------------

### Install Common Lisp Implementations with Roswell

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Use the 'ros install' command to install specific versions or the latest releases of Common Lisp implementations like SBCL and CCL.

```bash
# Installing SBCL 1.2.14
$ ros install sbcl/1.2.14
```

```bash
# Installing the latest SBCL
$ ros install sbcl
```

```bash
# Installing Clozure CL
$ ros install ccl-bin
```

--------------------------------

### Install Emacs using pacman

Source: https://roswell.github.io/How-to-setup-a-lisp-dev-environment-on-windows-with-Roswell.html

Use the pacman package manager within the MSYS2 bash environment to install Emacs. This is a prerequisite for setting up SLIME.

```shell
pacman -S emacs
```

--------------------------------

### Install Roswell from AUR (Arch Linux)

Source: https://roswell.github.io/Installation.html

Install Roswell on Arch Linux using the AUR helper 'yay'.

```bash
$ yay -S roswell

```

--------------------------------

### Installation on Red Hat-based Linux (dnf)

Source: https://roswell.github.io/Installation.html

Installs necessary development packages for Roswell on Red Hat-based systems using dnf.

```bash
sudo dnf install automake libcurl-devel
```

--------------------------------

### Install Roswell with Portage (Gentoo)

Source: https://roswell.github.io/Installation.html

Install Roswell on Gentoo Linux using the Portage package manager. Note potential binary file collisions with 'dev-libs/librouteros'.

```bash
$ emerge --ask dev-lisp/roswell

```

--------------------------------

### List Installed Common Lisp Implementations

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Check which Common Lisp implementations are currently installed on your system using the 'ros list installed' command.

```bash
$ ros list installed
```

--------------------------------

### Installation on Red Hat-based Linux (yum)

Source: https://roswell.github.io/Installation.html

Installs necessary development packages for Roswell on Red Hat-based systems using yum.

```bash
sudo yum install automake libcurl-devel
```

--------------------------------

### Install SBCL Source Code for SLIME

Source: https://roswell.github.io/FAQ.html

If using sbcl-bin with Roswell, install the source code separately to enable SLIME's jump-to-source functionality. This command downloads the source for sbcl-bin.

```bash
ros install sbcl[/version] --without-install
```

--------------------------------

### Install SLIME with Roswell

Source: https://roswell.github.io/Initial-Recommended-Setup.html

Use this command to install the SLIME package via Roswell. This is a prerequisite for Emacs integration.

```bash
ros install slime
```

--------------------------------

### Local Installation on Debian/Ubuntu

Source: https://roswell.github.io/Installation.html

Installs Roswell locally to avoid system-wide changes. Updates the user's profile to include the local bin directory in the PATH.

```bash
git clone -b release https://github.com/roswell/roswell.git
cd roswell
sh bootstrap
./configure --prefix=$HOME/.local
make
make install
echo 'PATH=$HOME/.local/bin:$PATH' >> ~/.profile
PATH=$HOME/.local/bin:$PATH ros setup

```

--------------------------------

### Show Available Lisp Implementations

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

View a list of all Lisp implementations that Roswell can install using the 'ros list versions' command.

```bash
$ ros list versions
candidates for ros list versions [impl] are:

abcl-bin
allegro
ccl-bin
clasp
clisp
cmu-bin
ecl
quicklisp
sbcl-bin
sbcl
slime


```

--------------------------------

### Upgrade Roswell from Source

Source: https://roswell.github.io/Upgrading-Roswell.html

Follow these steps to uninstall the old version, upgrade the source code, and then rebuild and install Roswell.

```bash
sudo make uninstall   # uninstall it before upgrading the source code, then run
```

```bash
git pull              # or whatever needed to upgrade the source code of roswell
```

```bash
make                  # compile C-based part of roswell (`ros` binary)
```

```bash
sudo make install     # install C-based binary and lisp source code to /usr/.../roswell
```

```bash
ros setup             # build (compile&load&dump) the lisp-based part of roswell, using `ros` binary. Results are the dumped lisp image and are saved in ~/.roswell
```

--------------------------------

### Install Additional Packages for Specific Lisp Implementations

Source: https://roswell.github.io/Travis-CI.html

For `clisp`, `abcl`, `alisp`, or `cmucl`, you may need to install additional APT packages like `openjdk-7-jre` or `libc6-i386`.

```yaml
addons:
  apt:
    packages:
      - libc6-i386
      - openjdk-7-jre
```

--------------------------------

### Factorial Roswell Script Example

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

This example demonstrates a Roswell script that calculates the factorial of a given number. It includes the standard Roswell script header and defines both a recursive factorial function and a `main` function to handle input and output.

```lisp
#!/bin/sh
#|-*- mode:lisp -*|
#|
exec ros -Q -- $0 "$@"
|#

(_defun_ fact (n)
  (_if_ (zerop n)
      1
      (* n (fact (1- n)))))

(_defun_ main (n &rest argv)
  (declare (ignore argv))
  (format t "~&Factorial ~D = ~D~%" n (fact (parse-integer n))))
```

--------------------------------

### Configure Vim for SLIMV

Source: https://roswell.github.io/Initial-Recommended-Setup.html

Add these commands to your .vimrc file to integrate SLIMV with Roswell. This sets the command to start Swank, the Lisp implementation, and the default Lisp.

```vimscript
let g:slimv_swank_cmd = "!ros -e '(ql:quickload :swank) (swank:create-server)' wait &"
```

```vimscript
let g:slimv_lisp = 'ros run'
```

```vimscript
let g:slimv_impl = 'sbcl'
```

--------------------------------

### CircleCI Configuration for Roswell Projects

Source: https://roswell.github.io/Circle-CI.html

This YAML configuration sets up the CircleCI environment for a Roswell project. It defines PATH and LLVM_CONFIG, installs system dependencies, builds and installs pocl, installs Roswell and Common Lisp implementations, and finally runs tests.

```yaml
machine:
  environment:
    PATH: ~/.roswell/bin:$PATH
    LLVM_CONFIG: /usr/lib/llvm-3.6/bin/llvm-config

dependencies:
  pre:
    - sudo bash -c 'echo "deb http://mirrors.kernel.org/ubuntu vivid main universe" >> /etc/apt/sources.list'
    - sudo apt-get update
    - apt-cache search pocl 
    - apt-cache search icd
    - apt-cache search opencl
    - sudo apt-get install -y libltdl3-dev libhwloc-dev ocl-icd-opencl-dev g++-4.8 clang-3.6 libclang-3.6-dev llvm-3.6-dev libedit-dev
    - ./build-pocl.sh
    - sudo make -C pocl install
    - curl -L https://raw.githubusercontent.com/roswell/roswell/master/scripts/install-for-ci.sh | sh
    - ros install ccl-bin
    - git clone https://github.com/cffi/cffi.git ~/lisp/cffi
  post:
    - ros install cffi
    - ros install cffi-grovel
    - ros install eazy-opencl
  cache_directories:
    - ~/.roswell/
    - pocl

test:
  override:
    - ros -L sbcl-bin testscr.ros
    - ros -L ccl-bin testscr.ros

```

--------------------------------

### CI Workflow for Roswell Projects

Source: https://roswell.github.io/GitHub-Actions.html

This YAML configuration sets up a GitHub Actions workflow to test a Roswell project across different Lisp implementations and operating systems. It includes steps for checking out code, installing Roswell, installing dependencies with rove, and running tests.

```yaml
name: CI

on: [push]

jobs:
  test:
    name: ${{ matrix.lisp }} on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        lisp: [sbcl-bin]
        os: [ubuntu-latest, macOS-latest]

    steps:
      - uses: actions/checkout@v1
      - name: Install Roswell
        env:
          LISP: ${{ matrix.lisp }}
        run: |
          curl -L https://raw.githubusercontent.com/roswell/roswell/master/scripts/install-for-ci.sh | sh
      - name: Install Rove
        run: ros install rove
      - name: Run tests
        run: |
          PATH="~/.roswell/bin:$PATH"
          rove qlot.asd
```

--------------------------------

### Launch Emacs with Roswell

Source: https://roswell.github.io/How-to-setup-a-lisp-dev-environment-on-windows-with-Roswell.html

Start Emacs using Roswell. The '&' symbol runs the process in the background, allowing you to continue using the terminal.

```shell
ros emacs &
```

--------------------------------

### Travis CI Configuration for Coveralls

Source: https://roswell.github.io/Coveralls.html

This configuration enables Coveralls reporting when the COVERALLS environment variable is set to true. It installs Roswell and runs tests using cl-coveralls.

```yaml
language: common-lisp
sudo: required

env:
  global:
    - PATH=~/.roswell/bin:$PATH
  matrix:
+    - LISP=sbcl-bin COVERALLS=true
    - LISP=ccl-bin
    - LISP=abcl
    - LISP=clisp
    - LISP=ecl

matrix:
  allow_failures:
    - env: LISP=clisp

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh

script:
+  - ros -s prove -s cl-coveralls
+        -e '(or (coveralls:with-coveralls (:exclude (list "t"))
                  (prove:run :quri-test))
                (uiop:quit -1))'
```

--------------------------------

### Add Roswell Bin to PATH

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

Configure your shell to directly execute scripts installed by Roswell without needing 'ros exec'. This involves adding ~/.roswell/bin to your PATH environment variable.

```bash
$ echo 'export PATH="$HOME/.roswell/bin:$PATH"' >> ~/.zshrc
$ clackup                                                         ### launch the web server!
```

--------------------------------

### Roswell Script with Auto-Compilation

Source: https://roswell.github.io/How-to-distribute-your-software%2C-not-library%2C-on-Quicklisp-ala-python-pip.html

A sample Roswell script that includes directives for automatic compilation using SBCL. The `-m <name>` option in the fourth line enables this feature when the script is installed in `.roswell/bin`.

```shell
#!/bin/sh
#|-*- mode:lisp -*-|
#| A utility library for Common Lisp dependant on SBCL
exec ros -Q -L sbcl-bin -m speed -- $0 "$@"
|#
```

```lisp
(defpackage #:ros.script.speed
  (:use #:cl))

(in-package :ros.script.speed)

(defun main (&rest argv)
  (declare (ignore argv))
  (print "Hello world"))

(main)

;;; vim: set ft=lisp lisp:
```

--------------------------------

### Measure Startup Time After Skipping Quicklisp

Source: https://roswell.github.io/Reducing-Startup-Time.html

After modifying the script to use `+Q`, use the `time` command again to observe the performance improvement in startup time.

```shell
$ time fact.ros 10
Factorial 10 = 3628800
-fact.ros 10  0.74s user 0.21s system 95% cpu 0.994 total
+fact.ros 10  0.57s user 0.19s system 97% cpu 0.780 total
```

--------------------------------

### Initialize and Run a Roswell Project

Source: https://roswell.github.io/Home.html

Use 'ros init' to create a new project from a template. Edit the generated file and then execute it directly.

```shell
$ ros init
Usage: ros init [template] name [options...]
```

```shell
$ ros init fact
Successfully generated: fact.ros
```

```shell
$ emacs fact.ros
## editing the fact.ros ...
```

```lisp
#!/bin/sh
#|-*- mode:lisp -*|
#|
exec ros -Q -- $0 "$@"
|#

(defun fact (n)
  (if (zerop n)
      1
      (* n (fact (1- n)))))

(defun main (n &rest argv)
  (declare (ignore argv))
  (format t "~&Factorial ~D = ~D~%" n (fact (parse-integer n))))
```

```shell
$ ./fact.ros 10
Factorial 10 = 3628800
```

--------------------------------

### Prepare for Release

Source: https://roswell.github.io/Release-Roswell.html

Execute this command to prepare for a new release. It will prompt for the new version number. Pressing Enter uses the default.

```shell
make release-prepare
```

--------------------------------

### Measure Executable Startup Time

Source: https://roswell.github.io/Reducing-Startup-Time.html

Measure the execution time of the generated executable using the `time` command. This demonstrates the substantial startup time reduction achieved by creating an executable.

```shell
$ time fact 10
Factorial 10 = 3628800
-fact.ros 10  0.57s user 0.19s system 97% cpu 0.780 total
+fact 10  0.00s user 0.02s system 96% cpu 0.024 total
```

--------------------------------

### Build Binary with Private Subprojects (Command Line)

Source: https://roswell.github.io/FAQ.html

Use this command to build an executable, specifying local project directories for private subprojects. Ensure you use PWD for direct execution or CURDIR if using make.

```bash
ros -e "(setf ql:*local-project-directories* '(#p"$(PWD)/\\"))" dump executable main.ros
```

--------------------------------

### Implement MKCL run command

Source: https://roswell.github.io/Support-New-implementation.html

Create `src/cmd-run-mkcl.c` by copying `src/cmd-run-sbcl.c` and modifying the function name from `cmd_run_sbcl` to `cmd_run_mkcl`. This provides the specific implementation details for running MKCL.

```diff
--- cmd-run-sbcl.c  2018-01-22 00:37:32.961614871 +0900
+++ cmd-run-mkcl.c  2018-02-27 18:29:13.276712741 +0900
@@ -1,7 +1,7 @@
 /* -*- tab-width : 2 -*- */
 #include "cmd-run.h"
 
-char** cmd_run_sbcl(int argc,char** argv,struct sub_command* cmd) {
+char** cmd_run_mkcl(int argc,char** argv,struct sub_command* cmd) {
   char* home=configdir();
   char* arch=uname_m();
   char* os=uname();
```

--------------------------------

### Measure Script Startup Time

Source: https://roswell.github.io/Reducing-Startup-Time.html

Use the `time` command to measure the execution time of a script. This helps in identifying performance bottlenecks.

```shell
$ time fact.ros 10
Factorial 10 = 3628800
fact.ros 10  0.74s user 0.21s system 95% cpu 0.994 total
```

--------------------------------

### Basic .travis.yml for Common Lisp with Roswell

Source: https://roswell.github.io/Travis-CI.html

A minimal .travis.yml configuration to set up Roswell and run tests using the prove test runner. Ensures the latest SBCL is used.

```yaml
language: common-lisp
sudo: required

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh

script:
  - ros -s prove -e '(or (prove:run :quri-test) (uiop:quit -1))'
```

--------------------------------

### Display Roswell Commands

Source: https://roswell.github.io/

Run 'ros' without any arguments to see a list of available commands and their usage. Use 'ros help [command]' for detailed information on specific commands.

```bash
$ ros
Common Lisp environment setup Utility.

Usage:

   ros [options] Command [arguments...]
or
   ros [options] [[--] script-path arguments...]

commands:
   run       Run repl
   install   Install a given implementation or a system for roswell environment
   update    Update installed systems.
   build     Make executable from script.
   use       Change default implementation.
   init      Creates a new ros script, optionally based on a template.
   list      List Information
   delete    Delete installed implementations
   config    Get and set options
   version   Show the roswell version information

Use "ros help [command]" for more information about a command.

Additional help topics:

   options

Use "ros help [topic]" for more information about the topic.
```

--------------------------------

### Skip Quicklisp Loading with Roswell

Source: https://roswell.github.io/Reducing-Startup-Time.html

Replace the `-Q` flag with `+Q` in the `ros` command to prevent Quicklisp from loading, which can reduce startup time. This is useful for scripts that do not require Quicklisp.

```shell
#!/bin/sh
#|-*- mode:lisp -*-|#
#|
-exec ros -Q -- $0 "$@"
+exec ros +Q -- $0 "$@"
|#
```

--------------------------------

### Troubleshooting Roswell Upgrade

Source: https://roswell.github.io/Upgrading-Roswell.html

If you encounter issues after upgrading, try removing old configuration files and reinstalling.

```bash
sudo rm -r /usr/local/etc/roswell/
```

```bash
rm -r ~/.roswell/
```

--------------------------------

### Basic Roswell Script Structure

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

A basic Roswell script starts with a shell shebang and a comment block that tells Roswell to execute the script. The actual Lisp code follows, typically defining a `main` function.

```lisp
#!/bin/sh
#|-*- mode:lisp -*|
#|
exec ros -Q -- $0 "$@"
|#
(_defun_ main (&rest argv)
  (declare (ignorable argv)))
```

--------------------------------

### Download Latest Debian Package

Source: https://roswell.github.io/Installation.html

Fetch the latest Roswell .deb package URL using curl and jq, then download it.

```bash
curl -sOL `curl -s https://api.github.com/repos/roswell/roswell/releases/latest | jq -r '.assets | .[] | select(.name|test("\\.deb$")) | .browser_download_url'`

```

--------------------------------

### Create Executable with `ros build`

Source: https://roswell.github.io/Reducing-Startup-Time.html

Use the `ros build` command to convert a Roswell script into a standalone executable. This significantly reduces startup time compared to running the script directly.

```shell
$ ros build fact.ros
[undoing binding stack and other enclosing state... done]
[saving current Lisp image into fact:
writing 4976 bytes from the read-only space at 0x20000000
writing 3168 bytes from the static space at 0x20100000
writing 52330496 bytes from the dynamic space at 0x1000000000
done]
```

--------------------------------

### Configuring Multiple Lisp Implementations in .travis.yml

Source: https://roswell.github.io/Travis-CI.html

This snippet shows how to use `env.matrix` in .travis.yml to specify multiple Common Lisp implementations for testing. Travis CI will create a separate build for each listed implementation.

```yaml
+env:
+  matrix:
+    - LISP=sbcl-bin
+    - LISP=ccl-bin
+    - LISP=abcl
+    - LISP=clisp
+    - LISP=ecl

...
```

--------------------------------

### Initialize a Roswell Script

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

Use `ros init` to create a new Roswell script. The generated script includes a shell header that executes Roswell.

```shell
$ ros init
Usage: ros init [template] name [options...]

$ ros init fact
Successfully generated: fact.ros
```

--------------------------------

### Add MKCL to Makefile.am

Source: https://roswell.github.io/Support-New-implementation.html

Update the `Makefile.am` in the `src` directory to include `cmd-run-mkcl.c` in the list of source files. This ensures the new implementation's source file is compiled.

```diff
diff --git a/src/Makefile.am b/src/Makefile.am
index 534e4a2..fbae016 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -14,7 +14,7 @@ ros_SOURCES = ros.c opt.c download.c download_windows.c archive.c archive_window register-commands.c html.c html-sbcl-bin.c \
 $(ros_utils) \
 cmd-internal.c cmd-script.c \
- cmd-run.c cmd-run-sbcl.c cmd-run-ccl.c cmd-run-clasp.c cmd-run-clisp.c cmd-run-ecl.c cmd-run-abcl.c cmd-run-cmu.c cmd-run-acl.c \
+ cmd-run.c cmd-run-sbcl.c cmd-run-ccl.c cmd-run-clasp.c cmd-run-clisp.c cmd-run-ecl.c cmd-run-abcl.c cmd-run-cmu.c cmd-run-acl.c cmd-run-mkcl.c \
 cmd-install.c install-sbcl-bin.c install-sbcl-bin_windows.c
if WITH_WIN_ICON
```

--------------------------------

### Configure Emacs for SBCL with .sbclrc

Source: https://roswell.github.io/Initial-Recommended-Setup.html

This configuration allows launching SBCL with a specific .sbclrc file using Roswell.

```emacs-lisp
(setq inferior-lisp-program "ros -L sbcl -Q -l ~/.sbclrc run")
```

--------------------------------

### Display Roswell Commands

Source: https://roswell.github.io/Home.html

Run 'ros' without arguments to see a list of available commands and their usage.

```bash
$ ros
Common Lisp environment setup Utility.

Usage:

   ros [options] Command [arguments...]
or
   ros [options] [[--] script-path arguments...]

commands:
   run       Run repl
   install   Install a given implementation or a system for roswell environment
   update    Update installed systems.
   build     Make executable from script.
   use       Change default implementation.
   init      Creates a new ros script, optionally based on a template.
   list      List Information
   delete    Delete installed implementations
   config    Get and set options
   version   Show the roswell version information

Use "ros help [command]" for more information about a command.

Additional help topics:

   options

Use "ros help [topic]" for more information about the topic.

```

--------------------------------

### Configure ASDF for Windows Users

Source: https://roswell.github.io/Initial-Recommended-Setup.html

On Windows, you may need to create this ASDF config file to help Atom find Lisp software. Adjust the path to match your system.

```lisp
(:source-registry
  (:tree "/Users/your-name/.roswell/lisp/quicklisp/dists/quicklisp/software/")
  :INHERIT-CONFIGURATION)
```

--------------------------------

### Upgrade Roswell using Makepkg (Archlinux AUR)

Source: https://roswell.github.io/Upgrading-Roswell.html

Update Roswell on Archlinux by downloading the new PKGBUILD file and running makepkg.

```bash
makepkg -i
```

--------------------------------

### Check and Set Default Lisp Implementation

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Verify the currently active Lisp implementation with 'ros run -- --version' and change the default using 'ros use [impl/version]'.

```bash
$ ros run -- --version      # check which implementation is used
```

```bash
$ ros use sbcl/1.2.3        # change the default implementation
```

--------------------------------

### Build a self-contained executable from a script

Source: https://roswell.github.io/Building-images-and-executables.html

Create a self-contained executable binary from a Roswell script using `ros build` (an alias for `ros dump executable`). The executable implies `--restart main`. Specify the output file with `-o OUTPUT`.

```shell
ros build my-script.ros -o my-executable
```

```shell
ros build my-script.ros
```

--------------------------------

### Configure Emacs for SLIME

Source: https://roswell.github.io/Initial-Recommended-Setup.html

Add these lines to your init.el file to load Roswell's Emacs helper and set the inferior Lisp program. This configures Emacs to use Roswell for running Lisp.

```emacs-lisp
(load (expand-file-name "~/.roswell/helper.el"))
```

```emacs-lisp
(_setq_ inferior-lisp-program "ros -Q run")
```

--------------------------------

### Push Release to Repository

Source: https://roswell.github.io/Release-Roswell.html

After committing, use this command to push the release to the remote repository. Follow the on-screen instructions for the exact push commands.

```shell
make release-push
```

--------------------------------

### Upgrade Roswell using Yaourt (Archlinux AUR)

Source: https://roswell.github.io/Upgrading-Roswell.html

Use the yaourt package manager to update Roswell on Archlinux.

```bash
yaourt -Sua roswell
```

--------------------------------

### Compilation with Nix

Source: https://roswell.github.io/Installation.html

Compiles Roswell using Nix, ensuring necessary build tools like autoconf, automake, and curl are available.

```bash
sh nix-shell -p autoconf automake curl --command 'sh -c "./bootstrap && ./configure && make"'
```

--------------------------------

### Activate Container-Based Infrastructure in Travis CI

Source: https://roswell.github.io/Travis-CI.html

Set `sudo: false` to use Travis CI's faster container-based infrastructure. This configuration is compatible with `sbcl` and `ccl`.

```yaml
language: common-lisp
-sudo: required
+sudo: false

env:
  global:
    - PATH=~/.roswell/bin:$PATH
+    - ROSWELL_INSTALL_DIR=$HOME/.roswell
  matrix:
    - LISP=sbcl-bin
    - LISP=ccl-bin

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh

script:
  - ros -s prove -e '(or (prove:run :quri-test) (uiop:quit -1))'
```

--------------------------------

### Travis CI Configuration with run-prove for Coveralls

Source: https://roswell.github.io/Coveralls.html

This configuration uses the `run-prove` command for testing and integrates with Coveralls. It sets a COVERAGE_EXCLUDE environment variable to exclude specific directories from coverage.

```yaml
language: common-lisp
sudo: required

env:
  global:
    - PATH=~/.roswell/bin:$PATH
+    - COVERAGE_EXCLUDE=t/
  matrix:
    - LISP=sbcl-bin COVERALLS=true
    - LISP=ccl-bin
    - LISP=abcl
    - LISP=clisp
    - LISP=ecl

matrix:
  allow_failures:
    - env: LISP=clisp

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh

script:
+  - run-prove quri-test.asd
```

--------------------------------

### Enable Directory Caching in Travis CI

Source: https://roswell.github.io/Travis-CI.html

Cache the `$HOME/.roswell` and `$HOME/.config/common-lisp` directories to significantly speed up build times by preserving dependencies and configurations between runs.

```yaml
language: common-lisp
sudo: false

env:
  global:
    - PATH=~/.roswell/bin:$PATH
    - ROSWELL_INSTALL_DIR=$HOME/.roswell
  matrix:
    - LISP=sbcl-bin
    - LISP=ccl-bin

install:
  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh

+cache:
+  directories:
+    - $HOME/.roswell
+    - $HOME/.config/common-lisp

script:
  - ros -s prove -e '(or (prove:run :quri-test) (uiop:quit -1))'
```

--------------------------------

### Disable Core Compression during Build

Source: https://roswell.github.io/Reducing-Startup-Time.html

To further reduce startup time, disable core compression when building an executable using `ros build --disable-compression <app.ros>`. This avoids the overhead associated with decompression.

```shell
ros build --disable-compression <app.ros>
```

--------------------------------

### Generate Release Changelog

Source: https://roswell.github.io/Release-Roswell.html

Use this command to automatically generate the changelog based on commit history. Ensure your commit messages are descriptive.

```shell
make release-changelog
```

--------------------------------

### Set Dynamic Space Size for SBCL

Source: https://roswell.github.io/Roswell-as-an-implementation-manager.html

Configure the dynamic space size for SBCL when running a command by setting the 'dynamic-space-size' variable before the 'run' command.

```bash
$ ros dynamic-space-size=400 run
```

--------------------------------

### Add MKCL to Roswell run command

Source: https://roswell.github.io/Support-New-implementation.html

Modify `src/cmd-run.c` to include the new implementation name and its corresponding command function. This allows Roswell to recognize and execute the new implementation.

```diff
diff --git a/src/cmd-run.c b/src/cmd-run.c
index ab5f8ee..f23bffa 100644
--- a/src/cmd-run.c
+++ b/src/cmd-run.c
@@ -20,6 +20,7 @@ struct run_impl_t impls_to_run[]={
   {"acl",&cmd_run_acl},
   {"alisp",&cmd_run_acl},
   {"allegro",&cmd_run_acl},
+  {"mkcl",&cmd_run_mkcl},
 };
 
 struct proc_opt run;
```

--------------------------------

### Running a Roswell Script

Source: https://roswell.github.io/Roswell-as-a-Scripting-Environment.html

Execute a Roswell script from the command line. The script takes arguments, which are passed to the `main` function within the Lisp code.

```shell
$ fact.ros 3
Factorial 3 = 6

$ fact.ros 10
Factorial 10 = 3628800
```

--------------------------------

### Declare MKCL run command function

Source: https://roswell.github.io/Support-New-implementation.html

Add the declaration for the `cmd_run_mkcl` function in `src/cmd-run.h`. This makes the function visible for use in other parts of the project.

```diff
diff --git a/src/cmd-run.h b/src/cmd-run.h
index 9808b58..6ffeef7 100644
--- a/src/cmd-run.h
+++ b/src/cmd-run.h
@@ -22,6 +22,7 @@ extern char** cmd_run_ecl(int argc,char** argv,struct sub_command* cmd);
 extern char** cmd_run_abcl(int argc,char** argv,struct sub_command* cmd);
 extern char** cmd_run_cmu(int argc,char** argv,struct sub_command* cmd);
 extern char** cmd_run_acl(int argc,char** argv,struct sub_command* cmd);
+extern char** cmd_run_mkcl(int argc,char** argv,struct sub_command* cmd);
 extern LVal register_runtime_options();
 int setup(char* target,char* env);
 #define SETUP_SYSTEM(sys,msg) {

```