Vadik Sirekanyan 4 months ago
commit
0c52a07033

+ 32 - 0
.github/workflows/build.yml

@@ -0,0 +1,32 @@
+on:
+  workflow_dispatch:
+  push:
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - shell: bash
+        run: ./gradlew linuxX64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew linuxArm64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew linuxX64DistTar linuxArm64DistTar
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - shell: bash
+        run: ./gradlew macosX64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew macosArm64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew macosX64DistZip macosArm64DistZip

+ 44 - 0
.github/workflows/release.yml

@@ -0,0 +1,44 @@
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - v*
+jobs:
+  release-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - shell: bash
+        run: ./gradlew linuxX64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew linuxArm64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew linuxX64DistTar linuxArm64DistTar
+      - if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            build/distributions/*
+  release-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - shell: bash
+        run: ./gradlew macosX64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew macosArm64Binaries -Prelease
+      - shell: bash
+        run: ./gradlew macosX64DistZip macosArm64DistZip
+      - if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            build/distributions/*

+ 2 - 0
.gitignore

@@ -0,0 +1,2 @@
+/.gradle
+/build

+ 21 - 0
LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Vadik Sirekanyan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

+ 8 - 0
README.md

@@ -0,0 +1,8 @@
+```bash
+Usage: todo [<options>] [<entry>]...
+
+Options:
+  -d, --delete=<N>  Delete N-th entry
+  -h, --history     Show deleted entries
+  --help            Show this message and exit
+```

+ 65 - 0
build.gradle.kts

@@ -0,0 +1,65 @@
+import org.gradle.internal.os.OperatingSystem
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+
+plugins {
+    val kotlinVersion = "2.2.0"
+    kotlin("multiplatform") version kotlinVersion
+    kotlin("plugin.serialization") version kotlinVersion
+    id("org.sirekanyan.version-checker") version "1.0.14"
+    distribution
+}
+
+group = "org.sirekanyan"
+version = "1.0.0"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    commonMainImplementation("com.github.ajalt.clikt:clikt-core:5.0.3")
+    commonMainImplementation("org.jetbrains.kotlinx:kotlinx-datetime:0.7.1")
+    commonMainImplementation("org.jetbrains.kotlinx:kotlinx-io-core:0.8.0")
+}
+
+kotlin {
+    val os = OperatingSystem.current()
+    buildList {
+        add(linuxX64())
+        add(linuxArm64())
+        if (os.isMacOsX) {
+            add(macosX64())
+            add(macosArm64())
+        }
+    }.forEach {
+        it.binaries {
+            executable(listOf(if (hasProperty("release")) RELEASE else DEBUG))
+        }
+    }
+}
+
+private val kotlinTargetNames: List<String> =
+    kotlin.targets.filterIsInstance<KotlinNativeTarget>().map { it.name }
+
+distributions {
+    kotlinTargetNames.forEach { targetName ->
+        create(targetName) {
+            distributionBaseName = "todo-${targetName.replace("X64", "-amd64").replace("Arm64", "-arm64")}"
+            contents {
+                from("build/bin/${targetName}/releaseExecutable/todo.kexe") {
+                    rename { it.removeSuffix(".kexe") }
+                }
+            }
+        }
+    }
+}
+
+kotlinTargetNames.forEach { targetName ->
+    tasks {
+        getByName<Tar>("${targetName}DistTar") {
+            filePermissions { unix("755") }
+            compression = Compression.GZIP
+            archiveExtension = "tar.gz"
+        }
+    }
+}

+ 3 - 0
gradle.properties

@@ -0,0 +1,3 @@
+kotlin.code.style=official
+kotlin.mpp.applyDefaultHierarchyTemplate=false
+org.gradle.configuration-cache=true

BIN
gradle/wrapper/gradle-wrapper.jar


+ 8 - 0
gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,8 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionSha256Sum=8fad3d78296ca518113f3d29016617c7f9367dc005f932bd9d93bf45ba46072b
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

+ 251 - 0
gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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/platforms/jvm/plugins-application/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 -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || 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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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, 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" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# 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 "$JAVACMD" "$@"

+ 94 - 0
gradlew.bat

@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+: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

+ 24 - 0
install.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+case "$1" in
+debug) MODE="debugExecutable" ;;
+release) MODE="releaseExecutable" ;;
+*) echo "Specify build type: debug or release" && exit 1 ;;
+esac
+
+case "$OSTYPE" in
+linux*) OS="linux" ;;
+darwin*) OS="macos" ;;
+*) echo "Unsupported operating system: $OSTYPE" && exit 1 ;;
+esac
+
+case "$(arch)" in
+x86_64) ARCH="X64" ;;
+arm64) ARCH="Arm64" ;;
+*) echo "Unsupported architecture: $(arch)" && exit 1 ;;
+esac
+
+sudo ln -sf "$PWD/build/bin/$OS$ARCH/$MODE/todo.kexe" "/usr/local/bin/todo"

+ 1 - 0
settings.gradle.kts

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

+ 17 - 0
snapcraft.yaml

@@ -0,0 +1,17 @@
+name: todo-cli
+base: core24
+version: 1.0.0
+summary: todo command-line app
+description: If you want to get it done, first write it down.
+
+grade: stable
+confinement: strict
+
+parts:
+  todo-cli:
+    plugin: dump
+    source: https://github.com/sirekanian/todo/releases/download/v$SNAPCRAFT_PROJECT_VERSION/todo-linux-$CRAFT_ARCH_BUILD_FOR-$SNAPCRAFT_PROJECT_VERSION.tar.gz
+
+apps:
+  todo-cli:
+    command: todo

+ 54 - 0
src/commonMain/kotlin/Main.kt

@@ -0,0 +1,54 @@
+import com.github.ajalt.clikt.core.CoreCliktCommand
+import com.github.ajalt.clikt.core.main
+import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.arguments.multiple
+import com.github.ajalt.clikt.parameters.options.flag
+import com.github.ajalt.clikt.parameters.options.help
+import com.github.ajalt.clikt.parameters.options.option
+import com.github.ajalt.clikt.parameters.types.int
+import org.sirekanyan.todo.files.HistoryFile
+import org.sirekanyan.todo.files.TodoFile
+import org.sirekanyan.todo.ext.print
+import org.sirekanyan.todo.ext.printNumbered
+import org.sirekanyan.todo.repository.HistoryRepository
+import org.sirekanyan.todo.repository.HistoryRepositoryImpl
+import org.sirekanyan.todo.repository.TodoRepository
+import org.sirekanyan.todo.repository.TodoRepositoryImpl
+
+private val todoRepository: TodoRepository by lazy { TodoRepositoryImpl(TodoFile, historyRepository) }
+private val historyRepository: HistoryRepository by lazy { HistoryRepositoryImpl(HistoryFile) }
+
+fun main(args: Array<String>) {
+    MainCommand().main(args)
+}
+
+private class MainCommand : CoreCliktCommand("todo") {
+
+    private val entry by argument().multiple()
+    private val delete: Int? by option("-d", "--delete", metavar = "ℕ").int().help("Delete ℕ-th entry")
+    private val history: Boolean by option("-h", "--history").flag().help("Show deleted entries")
+
+    override fun run() {
+        val entry = entry.ifEmpty { null }?.joinToString(" ")
+        val delete = delete
+        when {
+            entry == null && delete == null && !history -> {
+                todoRepository.readEntries().printNumbered()
+            }
+            entry != null && delete == null && !history -> {
+                todoRepository.writeEntry(entry)
+                todoRepository.readEntries().printNumbered()
+            }
+            entry == null && delete != null && !history -> {
+                todoRepository.removeEntry(delete - 1)
+                todoRepository.readEntries().printNumbered()
+            }
+            entry == null && delete == null && history -> {
+                historyRepository.readEntries().print()
+            }
+            else -> {
+                echoFormattedHelp()
+            }
+        }
+    }
+}

+ 12 - 0
src/commonMain/kotlin/org/sirekanyan/todo/ext/List.kt

@@ -0,0 +1,12 @@
+package org.sirekanyan.todo.ext
+
+fun <T> List<T>.print() {
+    forEach(::println)
+}
+
+fun <T> List<T>.printNumbered(start: Int = 1) {
+    val padding = (lastIndex + start).toString().length
+    forEachIndexed { index, entry ->
+        println((index + start).toString().padStart(padding) + ' ' + entry)
+    }
+}

+ 21 - 0
src/commonMain/kotlin/org/sirekanyan/todo/files/FileSystem.kt

@@ -0,0 +1,21 @@
+package org.sirekanyan.todo.files
+
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.toKString
+import kotlinx.io.files.Path
+import kotlinx.io.files.SystemFileSystem
+import platform.posix.getenv
+
+val CurrentFileSystem = SystemFileSystem
+
+private val HomeDirectory: Path =
+    @OptIn(ExperimentalForeignApi::class)
+    checkNotNull(getenv("HOME")?.toKString()?.let(::Path)) {
+        "The HOME environment variable is not specified"
+    }
+
+val TodoFile: Path =
+    Path(HomeDirectory, "todo.txt")
+
+val HistoryFile: Path =
+    Path(HomeDirectory, ".todo_history")

+ 20 - 0
src/commonMain/kotlin/org/sirekanyan/todo/files/Path.kt

@@ -0,0 +1,20 @@
+package org.sirekanyan.todo.files
+
+import kotlinx.io.Source
+import kotlinx.io.buffered
+import kotlinx.io.files.Path
+import kotlinx.io.readString
+import kotlinx.io.writeString
+
+private const val LineSeparator = "\n"
+
+fun Path.readEntries(): List<String> {
+    if (!CurrentFileSystem.exists(this)) return listOf()
+    val content = CurrentFileSystem.source(this).buffered().use(Source::readString)
+    return content.split(LineSeparator).filter(String::isNotBlank)
+}
+
+fun Path.writeEntries(entries: List<String>) {
+    val content = entries.filter(String::isNotBlank).joinToString(LineSeparator, postfix = LineSeparator)
+    CurrentFileSystem.sink(this).buffered().use { sink -> sink.writeString(content) }
+}

+ 27 - 0
src/commonMain/kotlin/org/sirekanyan/todo/repository/HistoryRepository.kt

@@ -0,0 +1,27 @@
+package org.sirekanyan.todo.repository
+
+import kotlinx.io.files.Path
+import org.sirekanyan.todo.files.readEntries
+import org.sirekanyan.todo.files.writeEntries
+import org.sirekanyan.todo.time.Today
+
+interface HistoryRepository {
+
+    fun readEntries(): List<String>
+
+    fun writeEntry(entry: String)
+}
+
+class HistoryRepositoryImpl(
+    private val file: Path,
+) : HistoryRepository {
+
+    override fun readEntries(): List<String> {
+        return file.readEntries()
+    }
+
+    override fun writeEntry(entry: String) {
+        val entries = file.readEntries()
+        file.writeEntries(entries.plus("$Today $entry"))
+    }
+}

+ 38 - 0
src/commonMain/kotlin/org/sirekanyan/todo/repository/TodoRepository.kt

@@ -0,0 +1,38 @@
+package org.sirekanyan.todo.repository
+
+import kotlinx.io.files.Path
+import org.sirekanyan.todo.files.readEntries
+import org.sirekanyan.todo.files.writeEntries
+
+interface TodoRepository {
+
+    fun readEntries(): List<String>
+
+    fun writeEntry(entry: String)
+
+    fun removeEntry(index: Int)
+}
+
+class TodoRepositoryImpl(
+    private val file: Path,
+    private val historyRepository: HistoryRepository,
+) : TodoRepository {
+
+    override fun readEntries(): List<String> {
+        return file.readEntries()
+    }
+
+    override fun writeEntry(entry: String) {
+        val entries = file.readEntries()
+        file.writeEntries(entries.plus(entry))
+    }
+
+    override fun removeEntry(index: Int) {
+        val entries = file.readEntries().toMutableList()
+        if (index in entries.indices) {
+            val deletedEntry = entries.removeAt(index)
+            historyRepository.writeEntry(deletedEntry)
+            file.writeEntries(entries)
+        }
+    }
+}

+ 14 - 0
src/commonMain/kotlin/org/sirekanyan/todo/time/Clock.kt

@@ -0,0 +1,14 @@
+package org.sirekanyan.todo.time
+
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.format
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
+import kotlin.time.ExperimentalTime
+
+val Today: String by lazy {
+    @OptIn(ExperimentalTime::class)
+    val now = Clock.System.now().toLocalDateTime(TimeZone.currentSystemDefault())
+    now.date.format(LocalDate.Formats.ISO)
+}