chore: switch update-check and release URLs to self-hosted Forgejo

GitHub-репо заморожены; релизы теперь на git.engelgardt23.ru.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -14,25 +14,21 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install build dependencies
+        run: python -m pip install --upgrade pip pyinstaller rich
+
       - name: Resolve version from tag
         id: ver
         shell: bash
         run: echo "version=${GITHUB_REF_NAME#v}" >> "$GITHUB_OUTPUT"
 
-      - name: Install ps2exe
-        shell: pwsh
-        run: Install-Module -Name ps2exe -Scope CurrentUser -Force -AllowClobber
-
       - name: Build executable
-        shell: pwsh
+        run: python -m PyInstaller --onefile --uac-admin --console --name netswitch --icon assets/icon.ico --paths src netswitch-launcher.py
-        run: |
-          Import-Module ps2exe
-          $ver = '${{ steps.ver.outputs.version }}'
-          Invoke-ps2exe -inputFile src/netswitch.ps1 -outputFile netswitch.exe `
-              -title "netswitch" -description "NIC IP/DHCP toggle - made by engelgardt" `
-              -company "engelgardt" -version "$ver.0" `
-              -iconFile assets/icon.ico `
-              -requireAdmin
 
       - name: Package portable folder
         shell: pwsh
@@ -40,7 +36,7 @@ jobs:
           $ver = '${{ steps.ver.outputs.version }}'
           $folder = "netswitch-v$ver"
           New-Item -ItemType Directory -Path $folder | Out-Null
-          Copy-Item netswitch.exe $folder/
+          Copy-Item dist/netswitch.exe $folder/
           @"
           netswitch v$ver - portable edition
           made by engelgardt
@@ -49,6 +45,7 @@ jobs:
 
           USAGE
             Double-click netswitch.exe.
+            Pick the language on first run (1 - English, 2 - Russian).
             Accept the UAC prompt.
             Pick the NIC, then choose mode (Static / DHCP).
             Press Enter to exit.
@@ -56,7 +53,7 @@ jobs:
           NOTES
             - Nothing is installed. Delete the folder to remove.
             - Requires Windows 10/11.
-            - PowerShell is bundled into the exe via ps2exe; nothing extra needed.
+            - Language can be changed any time by editing 'language = en/ru' in config.ini.
           "@ | Out-File -FilePath "$folder/README.txt" -Encoding UTF8
           Compress-Archive -Path $folder -DestinationPath "netswitch-portable-v$ver.zip"
 

.gitignore

@@ -1,8 +1,22 @@
-# Build output / staging
+# PyInstaller build artifacts
-*.exe
+build/
+dist/
+*.spec
+
+# Python cache
+__pycache__/
+*.py[cod]
+
+# Local build cache (prod/test/old portable folders per version)
+builds/
+
+# Legacy staging folders (kept for compatibility with old checkouts)
 portable-v*/
 
-# Local backup of release archives
+# Stray standalone exe (we never commit binaries — they live in GitHub releases)
+*.exe
+
+# Local backup of release archives (kept locally for history, not in repo)
 releases/
 
 # Editor / OS junk

CHANGELOG.md

@@ -6,6 +6,23 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and
 
 ## [Unreleased]
 
+## [1.2.0] - 2026-05-18
+### Changed
+- **Rewrote netswitch in Python** (was PowerShell + ps2exe). The single-file `.ps1` script is gone, replaced by a small `netswitch/` package (`app.py`, `config.py`, `i18n.py`, `network.py`, `platform_win.py`, `update_check.py`) that mirrors the layout used by `dhcpsrv`. CI now builds via PyInstaller instead of ps2exe.
+- Output is now a Rich-styled console (coloured banner, current-config table) instead of plain `Write-Host`.
+- The `Update available (vX.Y.Z)` notice in the header is a clickable terminal hyperlink to the GitHub releases page (OSC 8). Modern terminals render it as a link; older consoles show plain text.
+### Removed
+- `src/netswitch.ps1` and the ps2exe build step. If you specifically need a tiny PowerShell version, check out tag `v1.1.0`.
+
+## [1.1.0] - 2026-05-18
+### Added
+- Russian UI translation. On first launch the application asks which language to use (`1) English`, `2) Русский`) and writes the answer to a fresh `config.ini` next to `netswitch.exe`. To change the language later, edit `language = en` / `language = ru` in that file — the comment at the top of the file explains how, in both languages.
+- Bilingual `README.ru.md` linked from the main `README.md`.
+
+## [1.0.3] - 2026-05-17
+### Changed
+- Update check no longer interrupts startup with an interactive prompt. If a newer release is available, a quiet right-aligned `update available (vX.Y.Z)` hint is printed in dim grey directly under the banner — no key press required.
+
 ## [1.0.2] - 2026-05-17
 ### Fixed
 - Suppress `netsh` output to avoid mojibake on non-UTF-8 consoles (Russian Windows printed `╤Г╨╢╨╡ ╨▓╨║╨╗╤О╤З╨╡╨╜╨╛...` because netsh emits in the OEM code page). Our own English status lines remain; the post-change `Get-NetIPAddress` block already prints Unicode.
@@ -27,5 +44,10 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and
 - Auto-update check on startup: polls GitHub `/releases/latest` with a 3-second timeout and offers to open the download page if a newer version exists. Silent on offline / API errors.
 - MIT licensed.
 
-[Unreleased]: https://github.com/Engelgardt23/netswitch/compare/v1.0.0...HEAD
+[Unreleased]: https://github.com/Engelgardt23/netswitch/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/Engelgardt23/netswitch/compare/v1.1.0...v1.2.0
+[1.1.0]: https://github.com/Engelgardt23/netswitch/compare/v1.0.3...v1.1.0
+[1.0.3]: https://github.com/Engelgardt23/netswitch/compare/v1.0.2...v1.0.3
+[1.0.2]: https://github.com/Engelgardt23/netswitch/compare/v1.0.1...v1.0.2
+[1.0.1]: https://github.com/Engelgardt23/netswitch/compare/v1.0.0...v1.0.1
 [1.0.0]: https://github.com/Engelgardt23/netswitch/releases/tag/v1.0.0

README.md

@@ -3,6 +3,8 @@
 [![Latest release](https://img.shields.io/github/v/release/Engelgardt23/netswitch)](https://github.com/Engelgardt23/netswitch/releases/latest)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 
+🇺🇸 English | [🇷🇺 Русский](README.ru.md)
+
 A tiny portable tool to flip a Windows network adapter between a **static IP** and **DHCP** with a few keystrokes.
 
 Built for the recurring engineer chore of "give my laptop NIC 10.10.10.1 so I can talk to a server's BMC" and "now put it back on DHCP so I can have internet again."
@@ -36,11 +38,9 @@ On every launch the tool calls GitHub's `/releases/latest` (3-second timeout). I
 
 ## Build from source
 
-The script is a single `netswitch.ps1`. To rebuild the bundled `.exe`:
-
 ```
-Install-Module ps2exe -Scope CurrentUser
+python -m pip install rich pyinstaller
-Invoke-ps2exe -inputFile netswitch.ps1 -outputFile netswitch.exe -requireAdmin -title "netswitch" -version 1.0.0.0
+python -m PyInstaller --onefile --uac-admin --console --name netswitch --icon assets/icon.ico --paths src netswitch-launcher.py
 ```
 
 ## License

README.ru.md

@@ -0,0 +1,60 @@
+# netswitch
+
+[![Последний релиз](https://img.shields.io/github/v/release/Engelgardt23/netswitch)](https://github.com/Engelgardt23/netswitch/releases/latest)
+[![Лицензия: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+
+[🇺🇸 English](README.md) | 🇷🇺 Русский
+
+Маленький портативный инструмент, который за пару нажатий переключает сетевой адаптер Windows между **статическим IP** и **DHCP**.
+
+Решает регулярную задачу инженера: «дай моему ноуту 10.10.10.1, чтобы я мог достучаться до BMC сервера», а потом «верни обратно на DHCP, чтобы был интернет».
+
+> **Автор: engelgardt.**
+
+---
+
+## Скачать
+
+Последний релиз: [**страница релизов**](https://github.com/Engelgardt23/netswitch/releases/latest).
+Архив `netswitch-portable-vX.Y.Z.zip` (~30 КБ).
+
+## Запуск
+
+1. Распакуй куда угодно.
+2. Двойной клик по `netswitch.exe`.
+3. **При первом запуске** программа спросит язык интерфейса (1 — English, 2 — Русский). Ответ запишется в `config.ini` рядом с exe — потом можно поменять руками.
+4. Подтверди UAC (admin нужен для `netsh interface ipv4 set address`).
+5. Выбери сетевой адаптер из списка.
+6. Выбери режим:
+   - **Статический**: введи IP (по умолчанию `10.10.10.1`), маску (по умолчанию `255.255.255.0`), шлюз (опционально).
+   - **DHCP**: подтверди — адаптер вернётся в DHCP для IP и DNS.
+
+## Что фильтруется
+
+В выбор попадают только настоящие проводные физические адаптеры. Wi-Fi, VPN, виртуалки, Hyper-V, VMware, VirtualBox, TAP/TUN, WireGuard, OpenVPN, Tailscale, ZeroTier, Bluetooth, Loopback, WAN Miniport — всё пропускается.
+
+## Проверка обновлений
+
+При каждом запуске тулза стучится в GitHub `/releases/latest` (таймаут 3 секунды). Если есть свежая версия — справа в шапке появится тусклая надпись `доступно обновление (vX.Y.Z)`. Если интернета нет — молчит.
+
+## Конфиг
+
+При первом запуске рядом с `netswitch.exe` появится `config.ini`:
+
+```ini
+# Чтобы сменить язык интерфейса, измените 'language' ниже.
+# Допустимые значения: en, ru
+[General]
+language = ru
+```
+
+## Сборка из исходников
+
+```
+python -m pip install rich pyinstaller
+python -m PyInstaller --onefile --uac-admin --console --name netswitch --icon assets/icon.ico --paths src netswitch-launcher.py
+```
+
+## Лицензия
+
+MIT — см. [LICENSE](LICENSE).

netswitch-launcher.py

@@ -0,0 +1,12 @@
+"""
+PyInstaller entry point — sits at the repo root and uses an *absolute* import
+so the bundled exe doesn't need relative-import resolution at runtime.
+
+For dev work without an install use `python -m netswitch` instead.
+"""
+
+from netswitch.app import main
+
+
+if __name__ == "__main__":
+    main()

pyproject.toml

@@ -0,0 +1,26 @@
+[build-system]
+requires      = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name            = "netswitch"
+description     = "Portable Windows NIC IP / DHCP toggle."
+readme          = "README.md"
+requires-python = ">=3.10"
+license         = { text = "MIT" }
+authors         = [{ name = "engelgardt" }]
+dependencies    = ["rich>=13"]
+dynamic         = ["version"]
+
+[project.urls]
+Homepage = "https://github.com/Engelgardt23/netswitch"
+Issues   = "https://github.com/Engelgardt23/netswitch/issues"
+
+[project.scripts]
+netswitch = "netswitch.app:main"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.dynamic]
+version = { attr = "netswitch.__version__" }

src/netswitch.ps1

@@ -1,142 +0,0 @@
-# netswitch v1.0.0 - quick NIC IP / DHCP toggle
-# made by engelgardt
-
-$NetswitchVersion = '1.0.2'
-$GithubRepo       = 'Engelgardt23/netswitch'
-
-$ErrorActionPreference = 'Stop'
-
-# --- Self-elevate if not admin (no-op when launched from the ps2exe build which already requests admin) ---
-$me = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
-if (-not $me.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
-    if ($PSCommandPath) {
-        Start-Process -FilePath 'powershell.exe' `
-            -ArgumentList @('-NoProfile','-ExecutionPolicy','Bypass','-File',"`"$PSCommandPath`"") `
-            -Verb RunAs
-    } else {
-        Start-Process -FilePath ([System.Diagnostics.Process]::GetCurrentProcess().MainModule.FileName) -Verb RunAs
-    }
-    exit
-}
-
-# --- Banner ---
-Write-Host ""
-Write-Host "==============================================" -ForegroundColor Cyan
-Write-Host "  netswitch v$NetswitchVersion - NIC IP/DHCP toggle" -ForegroundColor Cyan
-Write-Host "==============================================" -ForegroundColor Cyan
-Write-Host ""
-
-# --- Update check ---
-function Test-NetswitchUpdate {
-    try {
-        $url = "https://api.github.com/repos/$GithubRepo/releases/latest"
-        $r = Invoke-RestMethod -Uri $url -TimeoutSec 3 -Headers @{ 'User-Agent' = "netswitch/$NetswitchVersion" }
-        $latest = ($r.tag_name -as [string]) -replace '^v',''
-        if (-not $latest) { return }
-        $toTuple = { param($s)
-            $parts = ($s -split '\.') | ForEach-Object {
-                $n = 0; [void][int]::TryParse($_, [ref]$n); $n
-            }
-            while ($parts.Count -lt 3) { $parts += 0 }
-            ,$parts[0..2]
-        }
-        $L = & $toTuple $latest
-        $C = & $toTuple $NetswitchVersion
-        $isNewer = $false
-        for ($i = 0; $i -lt 3; $i++) {
-            if ($L[$i] -gt $C[$i]) { $isNewer = $true; break }
-            if ($L[$i] -lt $C[$i]) { break }
-        }
-        if ($isNewer) {
-            Write-Host "Update available: v$NetswitchVersion -> $($r.tag_name)" -ForegroundColor Yellow
-            $ans = Read-Host "Open the download page in your browser? [Y/n]"
-            if ($ans -notmatch '^(n|N|no|NO)$') {
-                Start-Process $r.html_url
-            }
-            Write-Host ""
-        }
-    } catch {
-        # silent on offline / API errors
-    }
-}
-Test-NetswitchUpdate
-
-# --- Pick adapter (physical wired only) ---
-$skipDescriptionPattern = 'VPN|Virtual|AnyConnect|TAP-|TUN-|Bluetooth|Loopback|WAN Miniport|Hyper-V|VMware|VirtualBox|WireGuard|OpenVPN|Tailscale|ZeroTier'
-$skipMediaTypes         = @('Native 802.11', 'Wireless WAN')
-
-$adapters = @(Get-NetAdapter | Where-Object {
-    $_.Status               -notin @('Disabled','Not Present') -and
-    -not $_.Virtual                                            -and
-    $_.MediaType            -notin $skipMediaTypes             -and
-    $_.InterfaceDescription -notmatch $skipDescriptionPattern  -and
-    $_.Name                 -notmatch $skipDescriptionPattern
-} | Sort-Object ifIndex)
-
-if ($adapters.Count -eq 0) {
-    Write-Host "No physical wired adapters found." -ForegroundColor Red
-    Read-Host "Press Enter to exit"; exit 1
-}
-
-Write-Host "Available adapters:"
-for ($i = 0; $i -lt $adapters.Count; $i++) {
-    $a = $adapters[$i]
-    $ips = (Get-NetIPAddress -InterfaceIndex $a.ifIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue |
-            Where-Object { $_.PrefixOrigin -ne 'WellKnown' }).IPAddress -join ', '
-    Write-Host ("  {0}) [{1,-12}] {2}  ({3})  {4}" -f ($i + 1), $a.Status, $a.Name, $a.InterfaceDescription, $ips)
-}
-
-do {
-    $sel = (Read-Host "Select adapter number").Trim()
-    $valid = ($sel -match '^\d+$') -and ([int]$sel -ge 1) -and ([int]$sel -le $adapters.Count)
-    if (-not $valid) { Write-Host "Invalid selection." -ForegroundColor Red }
-} while (-not $valid)
-$nic = $adapters[[int]$sel - 1]
-Write-Host ""
-Write-Host "Selected: $($nic.Name)" -ForegroundColor Green
-
-# --- Mode ---
-Write-Host ""
-Write-Host "Mode:"
-Write-Host "  1) Static IP"
-Write-Host "  2) DHCP"
-$modeChoice = Read-Host "Choice [1]"
-if ([string]::IsNullOrWhiteSpace($modeChoice)) { $modeChoice = '1' }
-
-if ($modeChoice.Trim() -eq '2') {
-    # --- DHCP ---
-    Write-Host ""
-    Write-Host "Setting $($nic.Name) to DHCP..." -ForegroundColor Yellow
-    $null = & netsh interface ipv4 set address name="$($nic.Name)" source=dhcp 2>&1
-    $null = & netsh interface ipv4 set dnsservers name="$($nic.Name)" source=dhcp 2>&1
-    Write-Host "Done." -ForegroundColor Green
-}
-else {
-    # --- Static ---
-    $ip = Read-Host "IP address [10.10.10.1]"
-    if ([string]::IsNullOrWhiteSpace($ip)) { $ip = '10.10.10.1' }
-
-    $mask = Read-Host "Subnet mask [255.255.255.0]"
-    if ([string]::IsNullOrWhiteSpace($mask)) { $mask = '255.255.255.0' }
-
-    $gw = Read-Host "Gateway (Enter to skip)"
-
-    Write-Host ""
-    Write-Host "Setting $($nic.Name) -> $ip / $mask$( if ($gw) { " via $gw" })" -ForegroundColor Yellow
-
-    if ([string]::IsNullOrWhiteSpace($gw)) {
-        $null = & netsh interface ipv4 set address name="$($nic.Name)" static $ip $mask 2>&1
-    } else {
-        $null = & netsh interface ipv4 set address name="$($nic.Name)" static $ip $mask $gw 2>&1
-    }
-    Write-Host "Done." -ForegroundColor Green
-}
-
-# --- Show current state ---
-Write-Host ""
-Write-Host "Current IPv4 config:" -ForegroundColor Cyan
-Get-NetIPAddress -InterfaceIndex $nic.ifIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue |
-    Where-Object { $_.PrefixOrigin -ne 'WellKnown' } |
-    Format-Table IPAddress, PrefixLength, PrefixOrigin -AutoSize
-
-Read-Host "Press Enter to exit"

src/netswitch/__init__.py

@@ -0,0 +1,10 @@
+"""
+netswitch - portable Windows NIC IP / DHCP toggle.
+made by engelgardt
+
+The single source of truth for the project version. Bump this before tagging
+a release; CI reads the tag, the code reads this constant.
+"""
+
+__version__ = "1.2.1"
+GITHUB_REPO = "engel/netswitch"  # на Forgejo (git.engelgardt23.ru)

src/netswitch/__main__.py

@@ -0,0 +1,11 @@
+"""Entry point for `python -m netswitch` from a checked-out / installed package.
+
+The PyInstaller-bundled exe uses `netswitch-launcher.py` at the repo root instead,
+because PyInstaller runs the bundled script as a standalone module — relative
+imports fail there."""
+
+from .app import main
+
+
+if __name__ == "__main__":
+    main()

src/netswitch/app.py

@@ -0,0 +1,123 @@
+"""
+netswitch entry: language prompt + admin elevation + banner + adapter picker +
+mode (static/DHCP) + apply via netsh + show resulting config.
+"""
+
+from __future__ import annotations
+import sys
+
+from rich.console import Console
+from rich.prompt  import Prompt
+from rich.table   import Table
+
+from .              import __version__, GITHUB_REPO
+from .platform_win  import enable_vt, require_admin
+from .config        import load_config
+from .i18n          import set_language, t
+from .update_check  import check_for_update
+from .network       import list_adapters, set_static_ip, revert_to_dhcp, get_current_ipv4
+
+
+def _pick_adapter(console: Console) -> dict | None:
+    adapters = list_adapters()
+    if not adapters:
+        console.print(f"[red]{t('no_adapters')}[/]")
+        return None
+
+    console.print(t("available_adapters"))
+    for i, a in enumerate(adapters, 1):
+        ip = a.get("IPv4") or "—"
+        console.print(f"  {i}) [{a['Status']:<12}] {a['Name']}  ({a['Description']})  {ip}")
+
+    while True:
+        s = Prompt.ask(t("select_adapter")).strip()
+        if s.isdigit() and 1 <= int(s) <= len(adapters):
+            return adapters[int(s) - 1]
+        console.print(f"[red]{t('invalid_selection')}[/]")
+
+
+def _show_current(console: Console, nic: dict) -> None:
+    console.print()
+    console.print(f"[cyan]{t('current_config')}[/]")
+    rows = get_current_ipv4(int(nic["ifIndex"]))
+    if not rows:
+        console.print(f"[dim]{t('no_ip')}[/]")
+        return
+    tbl = Table(show_edge=False, pad_edge=False)
+    tbl.add_column(t("col_ip"))
+    tbl.add_column(t("col_prefix"), justify="right")
+    tbl.add_column(t("col_origin"))
+    for r in rows:
+        tbl.add_row(str(r.get("ip") or "—"),
+                    str(r.get("prefix_len") or "—"),
+                    str(r.get("prefix_origin") or "—"))
+    console.print(tbl)
+
+
+def main() -> None:
+    enable_vt()
+
+    # Language prompt before admin elevation so the user doesn't have to answer
+    # it twice across the UAC bounce.
+    cfg_data = load_config()
+    set_language(cfg_data["language"])
+
+    require_admin()
+
+    console = Console(log_path=False)
+
+    title  = f"[bold cyan]netswitch v{__version__}[/] {t('tagline')}"
+    latest = check_for_update()
+    if latest:
+        release_url = f"https://git.engelgardt23.ru/{GITHUB_REPO}/releases/latest"
+        notice      = t("update_available", tag=latest)
+        header = Table.grid(expand=True)
+        header.add_column(justify="left",  ratio=1)
+        header.add_column(justify="right")
+        header.add_row(title, f"[dim][link={release_url}]{notice}[/link][/]")
+        console.print(header)
+    else:
+        console.print(title)
+    console.print()
+
+    nic = _pick_adapter(console)
+    if not nic:
+        input(t("press_enter")); return
+
+    console.print()
+    console.print(f"[green]{t('selected', name=nic['Name'])}[/]")
+    console.print()
+
+    console.print(t("mode_header"))
+    console.print(t("mode_static"))
+    console.print(t("mode_dhcp"))
+
+    try:
+        choice = Prompt.ask(t("mode_choice"), default="1").strip() or "1"
+    except (EOFError, KeyboardInterrupt):
+        return
+
+    if choice == "2":
+        console.print()
+        console.print(f"[yellow]{t('setting_dhcp', name=nic['Name'])}[/]")
+        revert_to_dhcp(nic["Name"])
+        console.print(f"[green]{t('done')}[/]")
+    else:
+        ip   = (Prompt.ask(t("ip_prompt"),   default="10.10.10.1").strip()   or "10.10.10.1")
+        mask = (Prompt.ask(t("mask_prompt"), default="255.255.255.0").strip() or "255.255.255.0")
+        gw   = Prompt.ask(t("gw_prompt"),    default="").strip()
+
+        gw_tail = t("via_gw", gw=gw) if gw else ""
+        console.print()
+        console.print(f"[yellow]{t('setting_static', name=nic['Name'], ip=ip, mask=mask, gw_tail=gw_tail)}[/]")
+        set_static_ip(nic["Name"], ip, mask, gw)
+        console.print(f"[green]{t('done')}[/]")
+
+    _show_current(console, nic)
+
+    console.print()
+    input(t("press_enter"))
+
+
+if __name__ == "__main__":
+    main()

src/netswitch/config.py

@@ -0,0 +1,88 @@
+"""
+config.ini handling next to the executable.
+
+On first run the file does not exist — we ask the user which language to use
+and write the answer alongside the exe. On every subsequent run we just read
+it.
+"""
+
+from __future__ import annotations
+import configparser
+import sys
+from pathlib import Path
+
+
+SUPPORTED_LANGS = ("en", "ru")
+DEFAULT_LANG    = "en"
+
+CONFIG_HEADER = """\
+# ---------------------------------------------------------------------------
+# netswitch configuration
+#
+# To change the interface language, edit the 'language' value below.
+# Valid values: en, ru
+#
+# Чтобы сменить язык интерфейса, измените значение 'language' ниже.
+# Допустимые значения: en, ru
+# ---------------------------------------------------------------------------
+
+"""
+
+
+def app_dir() -> Path:
+    """Directory holding the running executable (or source folder when run via python)."""
+    if getattr(sys, "frozen", False):
+        return Path(sys.executable).resolve().parent
+    return Path(__file__).resolve().parent
+
+
+def config_path() -> Path:
+    return app_dir() / "config.ini"
+
+
+def _ask_language() -> str:
+    print()
+    print("Select language / Выберите язык:")
+    print("  1) English")
+    print("  2) Русский")
+    while True:
+        try:
+            choice = input("> ").strip()
+        except (EOFError, KeyboardInterrupt):
+            return DEFAULT_LANG
+        if choice == "1":
+            return "en"
+        if choice == "2":
+            return "ru"
+        print("Please enter 1 or 2 / Введите 1 или 2")
+
+
+def _write_config(lang: str) -> None:
+    path = config_path()
+    cp = configparser.ConfigParser()
+    cp["General"] = {"language": lang}
+    with path.open("w", encoding="utf-8") as f:
+        f.write(CONFIG_HEADER)
+        cp.write(f)
+
+
+def load_config() -> dict:
+    path = config_path()
+    if not path.exists():
+        lang = _ask_language()
+        try:
+            _write_config(lang)
+        except OSError:
+            pass
+        return {"language": lang}
+
+    cp = configparser.ConfigParser()
+    try:
+        cp.read(path, encoding="utf-8")
+    except (configparser.Error, OSError):
+        return {"language": DEFAULT_LANG}
+
+    lang = (cp.get("General", "language", fallback=DEFAULT_LANG) or DEFAULT_LANG).strip().lower()
+    if lang not in SUPPORTED_LANGS:
+        lang = DEFAULT_LANG
+    return {"language": lang}

src/netswitch/i18n.py

@@ -0,0 +1,83 @@
+"""
+Tiny in-memory translation table.
+"""
+
+from __future__ import annotations
+
+
+_lang = "en"
+
+STRINGS: dict[str, dict[str, str]] = {
+    "en": {
+        "tagline":            "- NIC IP/DHCP toggle",
+        "update_available":   "Update available ({tag})",
+        "no_adapters":        "No physical wired adapters found.",
+        "press_enter":        "Press Enter to exit",
+        "available_adapters": "Available adapters:",
+        "select_adapter":     "Select adapter number",
+        "invalid_selection":  "Invalid selection.",
+        "selected":           "Selected: {name}",
+        "mode_header":        "Mode:",
+        "mode_static":        "  1) Static IP",
+        "mode_dhcp":          "  2) DHCP",
+        "mode_choice":        "Choice [1]",
+        "setting_dhcp":       "Setting {name} to DHCP...",
+        "done":               "Done.",
+        "ip_prompt":          "IP address [10.10.10.1]",
+        "mask_prompt":        "Subnet mask [255.255.255.0]",
+        "gw_prompt":          "Gateway (Enter to skip)",
+        "setting_static":     "Setting {name} -> {ip} / {mask}{gw_tail}",
+        "via_gw":             " via {gw}",
+        "current_config":     "Current IPv4 config:",
+        "col_ip":             "IP",
+        "col_prefix":         "Prefix",
+        "col_origin":         "Origin",
+        "no_ip":              "(no IPv4 addresses)",
+    },
+    "ru": {
+        "tagline":            "— переключатель NIC IP/DHCP",
+        "update_available":   "Доступно обновление ({tag})",
+        "no_adapters":        "Подходящие проводные адаптеры не найдены.",
+        "press_enter":        "Нажмите Enter для выхода",
+        "available_adapters": "Доступные адаптеры:",
+        "select_adapter":     "Введите номер адаптера",
+        "invalid_selection":  "Неверный выбор.",
+        "selected":           "Выбрано: {name}",
+        "mode_header":        "Режим:",
+        "mode_static":        "  1) Статический IP",
+        "mode_dhcp":          "  2) DHCP",
+        "mode_choice":        "Выбор [1]",
+        "setting_dhcp":       "Перевожу {name} в режим DHCP...",
+        "done":               "Готово.",
+        "ip_prompt":          "IP-адрес [10.10.10.1]",
+        "mask_prompt":        "Маска подсети [255.255.255.0]",
+        "gw_prompt":          "Шлюз (Enter — пропустить)",
+        "setting_static":     "Назначаю {name} -> {ip} / {mask}{gw_tail}",
+        "via_gw":             " через {gw}",
+        "current_config":     "Текущая конфигурация IPv4:",
+        "col_ip":             "IP",
+        "col_prefix":         "Префикс",
+        "col_origin":         "Источник",
+        "no_ip":              "(нет IPv4-адресов)",
+    },
+}
+
+
+def set_language(lang: str) -> None:
+    global _lang
+    if lang in STRINGS:
+        _lang = lang
+
+
+def language() -> str:
+    return _lang
+
+
+def t(key: str, **params) -> str:
+    s = STRINGS.get(_lang, {}).get(key) or STRINGS["en"].get(key, key)
+    if params:
+        try:
+            return s.format(**params)
+        except (KeyError, IndexError):
+            return s
+    return s

src/netswitch/network.py

@@ -0,0 +1,107 @@
+"""
+Network plumbing: enumerate physical NICs, set / revert IP via netsh, dump
+current IPv4 config for the chosen NIC.
+"""
+
+from __future__ import annotations
+import json
+import os
+import subprocess
+from typing import Any
+
+CREATE_NO_WINDOW = 0x08000000 if os.name == "nt" else 0
+
+# Adapters we never show in the picker — same blacklist as dhcpsrv.
+SKIP_DESCRIPTION = (
+    "VPN", "Virtual", "AnyConnect", "TAP-", "TUN-", "Bluetooth", "Loopback",
+    "WAN Miniport", "Hyper-V", "VMware", "VirtualBox", "WireGuard", "OpenVPN",
+    "Tailscale", "ZeroTier",
+)
+SKIP_MEDIA = ("Native 802.11", "Wireless WAN")
+
+
+def _run_ps(cmd: str, timeout: int = 15) -> subprocess.CompletedProcess:
+    return subprocess.run(
+        ["powershell.exe", "-NoProfile", "-NonInteractive", "-Command", cmd],
+        capture_output=True, text=True, timeout=timeout,
+        creationflags=CREATE_NO_WINDOW,
+    )
+
+
+def _run_netsh(args: list[str], timeout: int = 15) -> subprocess.CompletedProcess:
+    return subprocess.run(
+        ["netsh", *args],
+        capture_output=True, text=True, timeout=timeout,
+        creationflags=CREATE_NO_WINDOW,
+    )
+
+
+def list_adapters() -> list[dict[str, Any]]:
+    """Return physical wired adapters only — skip wireless / VPN / virtual."""
+    cmd = (
+        r"Get-NetAdapter | ForEach-Object {"
+        r"  $ip = (Get-NetIPAddress -InterfaceIndex $_.ifIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue | "
+        r"        Where-Object PrefixOrigin -ne 'WellKnown' | Select-Object -ExpandProperty IPAddress) -join ','; "
+        r"  [pscustomobject]@{"
+        r"    Name=$_.Name; Description=$_.InterfaceDescription; Status=$_.Status; "
+        r"    Virtual=[bool]$_.Virtual; MediaType=$_.MediaType; ifIndex=$_.ifIndex; IPv4=$ip"
+        r"  }} | ConvertTo-Json -Depth 3 -Compress"
+    )
+    r = _run_ps(cmd, timeout=20)
+    if r.returncode != 0 or not r.stdout.strip():
+        return []
+    data = json.loads(r.stdout)
+    if isinstance(data, dict):
+        data = [data]
+
+    out: list[dict[str, Any]] = []
+    for a in data:
+        if a.get("Status") in ("Disabled", "Not Present"):
+            continue
+        if a.get("Virtual"):
+            continue
+        if a.get("MediaType") in SKIP_MEDIA:
+            continue
+        haystack = ((a.get("Description") or "") + " " + (a.get("Name") or "")).lower()
+        if any(k.lower() in haystack for k in SKIP_DESCRIPTION):
+            continue
+        out.append(a)
+    out.sort(key=lambda x: x["ifIndex"])
+    return out
+
+
+def set_static_ip(nic_name: str, ip: str, mask: str, gw: str = "") -> None:
+    args = ["interface", "ipv4", "set", "address", f"name={nic_name}", "static", ip, mask]
+    if gw:
+        args.append(gw)
+    _run_netsh(args)
+
+
+def revert_to_dhcp(nic_name: str) -> None:
+    _run_netsh(["interface", "ipv4", "set", "address",    f"name={nic_name}", "source=dhcp"])
+    _run_netsh(["interface", "ipv4", "set", "dnsservers", f"name={nic_name}", "source=dhcp"])
+
+
+def get_current_ipv4(if_index: int) -> list[dict[str, Any]]:
+    """Return non-link-local IPv4 addresses for the interface as
+    [{ip, prefix_len, prefix_origin}, ...]."""
+    cmd = (
+        f"Get-NetIPAddress -InterfaceIndex {if_index} -AddressFamily IPv4 -ErrorAction SilentlyContinue | "
+        r"Where-Object PrefixOrigin -ne 'WellKnown' | "
+        r"ForEach-Object { [pscustomobject]@{ "
+        r"  IP=$_.IPAddress; PrefixLength=$_.PrefixLength; PrefixOrigin=[string]$_.PrefixOrigin "
+        r"}} | ConvertTo-Json -Depth 3 -Compress"
+    )
+    r = _run_ps(cmd)
+    if r.returncode != 0 or not r.stdout.strip():
+        return []
+    try:
+        data = json.loads(r.stdout)
+    except json.JSONDecodeError:
+        return []
+    if isinstance(data, dict):
+        data = [data]
+    return [
+        {"ip": x.get("IP"), "prefix_len": x.get("PrefixLength"), "prefix_origin": x.get("PrefixOrigin")}
+        for x in data
+    ]

src/netswitch/platform_win.py

@@ -0,0 +1,43 @@
+"""
+Windows-specific bits: VT (ANSI) processing in the console, UAC self-elevation.
+"""
+
+from __future__ import annotations
+import ctypes
+import os
+import sys
+
+
+def enable_vt() -> None:
+    """Enable virtual-terminal processing on the Windows console so that ESC
+    escape sequences (colours, OSC 8 hyperlinks) are interpreted rather than
+    printed as literal characters."""
+    if os.name != "nt":
+        return
+    try:
+        k = ctypes.windll.kernel32
+        STD_OUT, STD_ERR = -11, -12
+        ENABLE_VT = 0x0004
+        for std in (STD_OUT, STD_ERR):
+            h = k.GetStdHandle(std)
+            mode = ctypes.c_ulong()
+            if k.GetConsoleMode(h, ctypes.byref(mode)):
+                k.SetConsoleMode(h, mode.value | ENABLE_VT)
+    except Exception:
+        pass
+
+
+def is_admin() -> bool:
+    try:
+        return ctypes.windll.shell32.IsUserAnAdmin() != 0
+    except Exception:
+        return False
+
+
+def require_admin() -> None:
+    """If we're not running elevated, relaunch ourselves through UAC and exit."""
+    if is_admin():
+        return
+    args = " ".join(f'"{a}"' for a in sys.argv)
+    ctypes.windll.shell32.ShellExecuteW(None, "runas", sys.executable, args, None, 1)
+    sys.exit(0)

src/netswitch/update_check.py

@@ -0,0 +1,35 @@
+"""Auto-update check. Returns the latest release tag if it is newer than the
+currently running version; otherwise None. Silent on any error."""
+
+from __future__ import annotations
+import json
+import urllib.request
+
+from . import __version__, GITHUB_REPO
+
+
+def _parse_version(s: str) -> tuple[int, int, int]:
+    try:
+        s = (s or "").strip().lstrip("v")
+        parts = [int(x) for x in s.split(".")[:3]]
+        while len(parts) < 3:
+            parts.append(0)
+        return tuple(parts)  # type: ignore[return-value]
+    except Exception:
+        return (0, 0, 0)
+
+
+def check_for_update() -> str | None:
+    try:
+        url = f"https://git.engelgardt23.ru/api/v1/repos/{GITHUB_REPO}/releases/latest"
+        req = urllib.request.Request(url, headers={
+            "User-Agent": f"netswitch/{__version__}",
+        })
+        with urllib.request.urlopen(req, timeout=3) as r:
+            data = json.loads(r.read().decode("utf-8", errors="replace"))
+        latest = (data.get("tag_name") or "").strip()
+        if latest and _parse_version(latest) > _parse_version(__version__):
+            return latest
+    except Exception:
+        pass
+    return None