initial commit

.gitea/workflows/main.yaml

@@ -0,0 +1,36 @@
+on:
+  push:
+    branches:
+      - main
+
+env:
+  GIT__TOKEN: ${{ secrets.TOKEN }}
+
+jobs:
+  publish:
+    runs-on: linux
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/cache/restore@v4
+        with:
+          key: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+            ~/.konan/
+
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+
+      - run: ./gradlew publish
+
+      - uses: actions/cache/save@v4
+        with:
+          key: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+            ~/.konan/

.gitignore

@@ -0,0 +1,10 @@
+# IDE
+/.idea/
+
+# Gradle
+/.gradle/
+/gradle.properties
+
+# Kotlin
+/.kotlin/
+/build/

LICENSE

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

build.gradle.kts

@@ -0,0 +1,48 @@
+group = "com.infendro"
+version = "1.2.2"
+
+repositories {
+    mavenCentral()
+}
+
+plugins {
+    alias(libs.plugins.multiplatform)
+    id("maven-publish")
+}
+
+kotlin {
+    jvm()
+    js {
+        nodejs()
+    }
+    linuxX64()
+}
+
+publishing {
+    repositories {
+        maven {
+            url = uri("https://git.infendro.com/api/packages/Infendro/maven")
+            authentication.create("header", HttpHeaderAuthentication::class)
+            credentials(HttpHeaderCredentials::class) {
+                val token = secret("git.token") ?: throw GradleException()
+
+                name = "Authorization"
+                value = "token $token"
+            }
+        }
+    }
+}
+
+fun secret(
+    key: String,
+): String? {
+    val property = key
+    val environment = key
+        .uppercase()
+        .replace(".", "__")
+
+    val prop = properties[property] as String?
+    val env = System.getenv(environment)
+
+    return prop ?: env
+}

gradle/libs.versions.toml

@@ -0,0 +1,5 @@
+[versions]
+kotlin = "2.1.20"
+
+[plugins]
+multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1 @@
+rootProject.name = "cli"

src/commonMain/kotlin/com/infendro/cli/Command.kt

@@ -0,0 +1,162 @@
+package com.infendro.cli
+
+import com.infendro.cli.Regex.ARGUMENT
+import com.infendro.cli.Regex.ARGUMENT_NAME
+import com.infendro.cli.Regex.COMMAND_NAME
+import com.infendro.cli.argument.Argument
+import com.infendro.cli.exception.build.*
+import com.infendro.cli.exception.run.ArgumentCountException
+import com.infendro.cli.exception.run.InvalidArgumentException
+import com.infendro.cli.exception.run.UnknownArgumentException
+import com.infendro.cli.exception.run.UnknownCommandException
+
+class Command private constructor(
+    private val name: String,
+    private val commands: List<Command>,
+    private val arguments: List<Argument<*>>,
+    private val block: Execution.() -> Unit,
+) {
+    fun run(
+        args: Array<String>,
+    ) {
+        val index = args
+            .withIndex()
+            .find { (_, value) -> value.startsWith("--") }
+            ?.index ?: args.size
+
+        val c = args.slice(0..<index)
+        val a = args.slice(index..<args.size)
+
+        try {
+            run(c, a)
+        } catch (e: UnknownCommandException) {
+            println("""unknown command "${e.command}"""")
+        } catch (e: InvalidArgumentException) {
+            println("""invalid argument "${e.argument}"""")
+        } catch (e: UnknownArgumentException) {
+            println("""unknown argument "${e.argument}"""")
+        } catch (e: ArgumentCountException) {
+            when {
+                e.min == e.max -> println("""argument "${e.argument}" must appear ${e.min} times""")
+                e.max == Int.MAX_VALUE -> println("""argument "${e.argument}" must appear at least ${e.min} times""")
+                else -> println("""argument "${e.argument}" must appear between ${e.min} and ${e.max} times""")
+            }
+        }
+    }
+
+    private fun run(
+        cmd: List<String>, args: List<String>,
+    ) {
+        if (cmd.isEmpty()) {
+            val arguments = parseArguments(args)
+            execute(arguments)
+        } else {
+            val command = commands.find { it.name == cmd[0] }
+                ?: throw UnknownCommandException(cmd[0])
+            command.run(cmd.drop(1), args)
+        }
+    }
+
+    private fun execute(
+        arguments: List<Execution.Argument>,
+    ) {
+        val execution = Execution(arguments)
+        execution.block()
+    }
+
+    private fun parseArguments(
+        args: List<String>,
+    ): List<Execution.Argument> {
+        val result = mutableListOf<Execution.Argument>()
+
+        for (arg in args) {
+            val match = ARGUMENT.matchEntire(arg)
+                ?: throw InvalidArgumentException(arg)
+
+            val name = match.groups["name"]!!.value
+            val value = match.groups["value"]?.value
+
+            if (arguments.none { it.name == name })
+                throw UnknownArgumentException(name)
+
+            result += Execution.Argument(name, value)
+        }
+
+        arguments
+            .forEach { argument ->
+                val count = result.count { it.name == argument.name }
+                if (count !in argument.min..argument.max)
+                    throw ArgumentCountException(argument.name, argument.min, argument.max)
+            }
+
+        return result
+    }
+
+    class Builder(
+        private val name: String = "",
+    ) {
+        private val commands = mutableListOf<Command>()
+        private val arguments = mutableListOf<Argument<*>>()
+        private lateinit var block: Execution.() -> Unit
+
+        fun command(
+            name: String,
+            block: Builder.() -> Unit,
+        ) {
+            if (!COMMAND_NAME.matches(name))
+                throw IllegalCommandNameException(name)
+
+            if (commands.any { it.name == name })
+                throw DuplicateCommandException(name)
+
+            val builder = Builder(name)
+            builder.block()
+            val command = builder.build()
+            commands.add(command)
+        }
+
+        fun argument(
+            argument: Argument<*>,
+        ) {
+            if (!ARGUMENT_NAME.matches(argument.name))
+                throw IllegalArgumentNameException(argument.name)
+
+            if (arguments.any { it.name == argument.name })
+                throw DuplicateArgumentException(argument.name)
+
+            arguments.add(argument)
+        }
+
+        fun arguments(
+            vararg arguments: Argument<*>,
+        ) {
+            for (argument in arguments) {
+                argument(argument)
+            }
+        }
+
+        fun execute(
+            block: Execution.() -> Unit,
+        ) {
+            if (this::block.isInitialized)
+                throw DuplicateExecuteException()
+
+            this.block = block
+        }
+
+        fun build(): Command {
+            if (!this::block.isInitialized)
+                throw NoExecuteException()
+
+            return Command(name, commands, arguments, block)
+        }
+    }
+}
+
+fun cli(
+    block: Command.Builder.() -> Unit,
+): Command {
+    val builder = Command.Builder()
+    builder.block()
+    return builder.build()
+}

src/commonMain/kotlin/com/infendro/cli/Execution.kt

@@ -0,0 +1,52 @@
+package com.infendro.cli
+
+import com.infendro.cli.argument.Argument.*
+import kotlin.reflect.KProperty
+
+class Execution(
+    val arguments: List<Argument>,
+) {
+    class Argument(
+        val name: String,
+        val value: String?,
+    )
+
+    operator fun <T> Single<T>.getValue(
+        thisRef: Any?,
+        property: KProperty<*>,
+    ): T {
+        return parser.parse(
+            arguments
+                .find { it.name == name }!!
+                .value
+        )
+    }
+
+    operator fun <T> SingleOrElse<T>.getValue(
+        thisRef: Any?,
+        property: KProperty<*>,
+    ): T {
+        return arguments
+            .find { it.name == name }
+            ?.let { parser.parse(it.value) }
+            ?: other
+    }
+
+    operator fun <T> SingleOrNull<T>.getValue(
+        thisRef: Any?,
+        property: KProperty<*>,
+    ): T? {
+        return arguments
+            .find { it.name == name }
+            ?.let { parser.parse(it.value) }
+    }
+
+    operator fun <T> Multiple<T>.getValue(
+        thisRef: Any?,
+        property: KProperty<*>,
+    ): List<T> {
+        return arguments
+            .filter { it.name == name }
+            .map { parser.parse(it.value) }
+    }
+}

src/commonMain/kotlin/com/infendro/cli/Main.kt

@@ -0,0 +1,45 @@
+package com.infendro.cli
+
+import com.infendro.cli.ARG.NAME
+import com.infendro.cli.ARG.B
+import com.infendro.cli.ARG.C
+import com.infendro.cli.ARG.D
+import com.infendro.cli.ARG.E
+import com.infendro.cli.ARG.F
+import com.infendro.cli.argument.*
+
+object ARG {
+    val NAME = stringOrNull("a")
+    val B = stringOrElse("b", "x")
+    val C = ints("c", min = 2, max = 3)
+    val D = strings("d")
+    val E = booleanOrElse("e", true)
+    val F = booleanOrNull("f")
+}
+
+fun main(args: Array<String>) {
+    cli {
+        val G = boolean("g")
+        arguments(NAME, B, C, D, E, F)
+
+        execute {
+            val name by NAME
+            val b by B
+            val c by C
+            val d by D
+            val e by E
+            val f by F
+            val g by G
+
+            println(g)
+        }
+    }.run(
+        arrayOf(
+            "--a=woah",
+            "--c=0",
+            "--c=0",
+//        "--f=false",
+            "--g",
+        )
+    )
+}

src/commonMain/kotlin/com/infendro/cli/Regex.kt

@@ -0,0 +1,7 @@
+package com.infendro.cli
+
+internal object Regex {
+    val COMMAND_NAME = """[a-z]+(?:-[a-z]+)*""".toRegex()
+    val ARGUMENT_NAME = """[a-z]+(?:[\-.][a-z]+)*""".toRegex()
+    val ARGUMENT = """--(?<name>[a-z]+(?:[\-.][a-z]+)*)(?:=(?<value>.*))?""".toRegex()
+}

src/commonMain/kotlin/com/infendro/cli/argument/Argument.kt

@@ -0,0 +1,45 @@
+package com.infendro.cli.argument
+
+sealed class Argument<T> {
+    abstract val name: String
+    abstract val min: Int
+    abstract val max: Int
+
+    abstract class Single<T> : Argument<T>() {
+        final override val min: Int
+            get() = 1
+        final override val max: Int
+            get() = 1
+
+        abstract val parser: Parser<T>
+    }
+
+    abstract class SingleOrElse<T> : Argument<T>() {
+        abstract val other: T
+
+        final override val min: Int
+            get() = 0
+        final override val max: Int
+            get() = 1
+
+        abstract val parser: Parser<T>
+    }
+
+    abstract class SingleOrNull<T> : Argument<T>() {
+        final override val min: Int
+            get() = 0
+        final override val max: Int
+            get() = 1
+
+        abstract val parser: Parser<T>
+    }
+
+    abstract class Multiple<T> : Argument<List<T>>() {
+        override val min: Int
+            get() = 0
+        override val max: Int
+            get() = Int.MAX_VALUE
+
+        abstract val parser: Parser<T>
+    }
+}

src/commonMain/kotlin/com/infendro/cli/argument/Boolean.kt

@@ -0,0 +1,84 @@
+package com.infendro.cli.argument
+
+import com.infendro.cli.Command
+
+private object BooleanParser : Parser<Boolean> {
+    override fun parse(
+        text: String?,
+    ): Boolean {
+        return text == null || text.toBooleanStrict()
+    }
+}
+
+class BooleanArgument(
+    override val name: String,
+) : Argument.Single<Boolean>() {
+    override val parser: Parser<Boolean>
+        get() = BooleanParser
+}
+
+fun boolean(
+    name: String,
+) = BooleanArgument(name)
+
+fun Command.Builder.boolean(
+    name: String,
+) = BooleanArgument(name)
+    .also { argument(it) }
+
+class BooleanOrElseArgument(
+    override val name: String,
+    override val other: Boolean,
+) : Argument.SingleOrElse<Boolean>() {
+    override val parser: Parser<Boolean>
+        get() = BooleanParser
+}
+
+fun booleanOrElse(
+    name: String,
+    other: Boolean,
+) = BooleanOrElseArgument(name, other)
+
+fun Command.Builder.booleanOrElse(
+    name: String,
+    other: Boolean,
+) = BooleanOrElseArgument(name, other)
+    .also { argument(it) }
+
+class BooleanOrNullArgument(
+    override val name: String,
+) : Argument.SingleOrNull<Boolean>() {
+    override val parser: Parser<Boolean>
+        get() = BooleanParser
+}
+
+fun booleanOrNull(
+    name: String,
+) = BooleanOrNullArgument(name)
+
+fun Command.Builder.booleanOrNull(
+    name: String,
+) = BooleanOrNullArgument(name)
+    .also { argument(it) }
+
+class BooleansArgument(
+    override val name: String,
+    override val min: Int = 0,
+    override val max: Int = Int.MAX_VALUE,
+) : Argument.Multiple<Boolean>() {
+    override val parser: Parser<Boolean>
+        get() = BooleanParser
+}
+
+fun booleans(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = BooleansArgument(name, min, max)
+
+fun Command.Builder.booleans(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = BooleansArgument(name, min, max)
+    .also { argument(it) }

src/commonMain/kotlin/com/infendro/cli/argument/Int.kt

@@ -0,0 +1,84 @@
+package com.infendro.cli.argument
+
+import com.infendro.cli.Command
+
+private object IntParser : Parser<Int> {
+    override fun parse(
+        text: String?,
+    ): Int {
+        return text!!.toInt()
+    }
+}
+
+class IntArgument(
+    override val name: String,
+) : Argument.Single<Int>() {
+    override val parser: Parser<Int>
+        get() = IntParser
+}
+
+fun int(
+    name: String,
+) = IntArgument(name)
+
+fun Command.Builder.int(
+    name: String,
+) = IntArgument(name)
+    .also { argument(it) }
+
+class IntOrElseArgument(
+    override val name: String,
+    override val other: Int,
+) : Argument.SingleOrElse<Int>() {
+    override val parser: Parser<Int>
+        get() = IntParser
+}
+
+fun intOrElse(
+    name: String,
+    other: Int,
+) = IntOrElseArgument(name, other)
+
+fun Command.Builder.intOrElse(
+    name: String,
+    other: Int,
+) = IntOrElseArgument(name, other)
+    .also { argument(it) }
+
+class IntOrNullArgument(
+    override val name: String,
+) : Argument.SingleOrNull<Int>() {
+    override val parser: Parser<Int>
+        get() = IntParser
+}
+
+fun intOrNull(
+    name: String,
+) = IntOrNullArgument(name)
+
+fun Command.Builder.intOrNull(
+    name: String,
+) = IntOrNullArgument(name)
+    .also { argument(it) }
+
+class IntsArgument(
+    override val name: String,
+    override val min: Int = 0,
+    override val max: Int = Int.MAX_VALUE,
+) : Argument.Multiple<Int>() {
+    override val parser: Parser<Int>
+        get() = IntParser
+}
+
+fun ints(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = IntsArgument(name, min, max)
+
+fun Command.Builder.ints(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = IntsArgument(name, min, max)
+    .also { argument(it) }

src/commonMain/kotlin/com/infendro/cli/argument/Parser.kt

@@ -0,0 +1,7 @@
+package com.infendro.cli.argument
+
+interface Parser<T> {
+    fun parse(
+        text: String?,
+    ): T
+}

src/commonMain/kotlin/com/infendro/cli/argument/String.kt

@@ -0,0 +1,84 @@
+package com.infendro.cli.argument
+
+import com.infendro.cli.Command
+
+private object StringParser : Parser<String> {
+    override fun parse(
+        text: String?,
+    ): String {
+        return text!!
+    }
+}
+
+class StringArgument(
+    override val name: String,
+) : Argument.Single<String>() {
+    override val parser: Parser<String>
+        get() = StringParser
+}
+
+fun string(
+    name: String,
+) = StringArgument(name)
+
+fun Command.Builder.string(
+    name: String,
+) = StringArgument(name)
+    .also { argument(it) }
+
+class StringOrElseArgument(
+    override val name: String,
+    override val other: String,
+) : Argument.SingleOrElse<String>() {
+    override val parser: Parser<String>
+        get() = StringParser
+}
+
+fun stringOrElse(
+    name: String,
+    other: String,
+) = StringOrElseArgument(name, other)
+
+fun Command.Builder.stringOrElse(
+    name: String,
+    other: String,
+) = StringOrElseArgument(name, other)
+    .also { argument(it) }
+
+class StringOrNullArgument(
+    override val name: String,
+) : Argument.SingleOrNull<String>() {
+    override val parser: Parser<String>
+        get() = StringParser
+}
+
+fun stringOrNull(
+    name: String,
+) = StringOrNullArgument(name)
+
+fun Command.Builder.stringOrNull(
+    name: String,
+) = StringOrNullArgument(name)
+    .also { argument(it) }
+
+class StringsArgument(
+    override val name: String,
+    override val min: Int = 0,
+    override val max: Int = Int.MAX_VALUE,
+) : Argument.Multiple<String>() {
+    override val parser: Parser<String>
+        get() = StringParser
+}
+
+fun strings(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = StringsArgument(name, min, max)
+
+fun Command.Builder.strings(
+    name: String,
+    min: Int = 0,
+    max: Int = Int.MAX_VALUE,
+) = StringsArgument(name, min, max)
+    .also { argument(it) }

src/commonMain/kotlin/com/infendro/cli/exception/build/DuplicateArgumentException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.build
+
+class DuplicateArgumentException(
+    val argument: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/build/DuplicateCommandException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.build
+
+class DuplicateCommandException(
+    val command: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/build/DuplicateExecuteException.kt

@@ -0,0 +1,3 @@
+package com.infendro.cli.exception.build
+
+class DuplicateExecuteException : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/build/IllegalArgumentNameException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.build
+
+class IllegalArgumentNameException(
+    val name: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/build/IllegalCommandNameException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.build
+
+class IllegalCommandNameException(
+    val name: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/build/NoExecuteException.kt

@@ -0,0 +1,3 @@
+package com.infendro.cli.exception.build
+
+class NoExecuteException : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/run/ArgumentCountException.kt

@@ -0,0 +1,7 @@
+package com.infendro.cli.exception.run
+
+class ArgumentCountException(
+    val argument: String,
+    val min: Int,
+    val max: Int,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/run/InvalidArgumentException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.run
+
+class InvalidArgumentException(
+    val argument: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/run/UnknownArgumentException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.run
+
+class UnknownArgumentException(
+    val argument: String,
+) : Exception()

src/commonMain/kotlin/com/infendro/cli/exception/run/UnknownCommandException.kt

@@ -0,0 +1,5 @@
+package com.infendro.cli.exception.run
+
+class UnknownCommandException(
+    val command: String,
+) : Exception()