Bump opencode to v1.4.17, add file utility to base image

Reduces locale generation from 200+ to 16 targeted locales (major world
languages + Nordic + key European). Saves build time and image size.
Users can add more at runtime via locale-gen.

DOCKER_HUB.md

@@ -125,7 +125,9 @@ The container defaults to English (`en_US.UTF-8`) and neovim as the editor. Over
 | `LC_ALL` | Override all locale settings | `en_US.UTF-8` |
 | `EDITOR` | Default text editor | `nvim` |
 
-All common UTF-8 locales are pre-generated in the image. Example for Swedish:
+Pre-generated locales: `en_US`, `en_GB`, `sv_SE`, `da_DK`, `nb_NO`, `fi_FI`, `de_DE`, `fr_FR`, `es_ES`, `it_IT`, `pt_BR`, `nl_NL`, `pl_PL`, `ja_JP`, `ko_KR`, `zh_CN` (all UTF-8).
+
+Example for Swedish:
 
 ```bash
 LANG=sv_SE.UTF-8
@@ -133,6 +135,15 @@ LANGUAGE=sv_SE:sv
 LC_ALL=sv_SE.UTF-8
 ```
 
+To add a locale not in the list, run inside the container:
+
+```bash
+sudo sed -i '/xx_XX.UTF-8/s/^# //g' /etc/locale.gen
+sudo locale-gen
+```
+
+Replace `xx_XX` with the desired locale (e.g. `ru_RU`, `tr_TR`). This change does not persist across container restarts — for permanent additions, build from source and modify the Dockerfile.
+
 ## Initial Setup
 
 ### 1. Create host directories

Dockerfile

@@ -5,7 +5,7 @@ ARG DEBIAN_VERSION=trixie-slim
 FROM debian:${DEBIAN_VERSION} AS base
 
 ARG TARGETARCH
-ARG OPENCODE_VERSION=1.4.11
+ARG OPENCODE_VERSION=1.4.17
 
 LABEL maintainer="joakimp"
 LABEL description="Portable opencode developer container"
@@ -34,6 +34,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     diffutils \
     git-crypt \
     age \
+    file \
     sudo \
     locales \
     procps \
@@ -73,7 +74,7 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "arm64" ;
     nvim --version | head -1
 
 # bat — syntax-highlighted cat replacement
-ARG BAT_VERSION=0.25.0
+ARG BAT_VERSION=0.26.1
 RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
     curl -fsSL "https://github.com/sharkdp/bat/releases/download/v${BAT_VERSION}/bat-v${BAT_VERSION}-${ARCH}-unknown-linux-musl.tar.gz" | tar -xz -C /tmp && \
     install /tmp/bat-v${BAT_VERSION}-${ARCH}-unknown-linux-musl/bat /usr/local/bin/bat && \
@@ -93,7 +94,7 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64"
     zoxide --version
 
 # uv — fast Python package manager (replaces pip, venv, pyenv)
-ARG UV_VERSION=0.11.6
+ARG UV_VERSION=0.11.7
 RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
     curl -fsSL "https://github.com/astral-sh/uv/releases/download/${UV_VERSION}/uv-${ARCH}-unknown-linux-musl.tar.gz" | tar -xz -C /tmp && \
     install /tmp/uv-${ARCH}-unknown-linux-musl/uv /usr/local/bin/uv && \
@@ -110,7 +111,8 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64"
     chmod +x /usr/local/bin/rustup-init
 
 # Set locale — generate common UTF-8 locales (override via LANG/LC_ALL env vars)
-RUN sed -i '/\.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
+# To add more locales, run: sudo sed -i '/<locale>.UTF-8/s/^# //g' /etc/locale.gen && sudo locale-gen
+RUN sed -i -E '/(en_US|en_GB|sv_SE|da_DK|nb_NO|fi_FI|de_DE|fr_FR|es_ES|it_IT|pt_BR|nl_NL|pl_PL|ja_JP|ko_KR|zh_CN)\.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
 ENV LANG=en_US.UTF-8
 ENV LANGUAGE=en_US:en
 ENV LC_ALL=en_US.UTF-8
@@ -150,7 +152,7 @@ RUN if [ "${INSTALL_PYTHON}" = "true" ]; then \
 
 # ── Optional: Go ─────────────────────────────────────────────────────
 ARG INSTALL_GO=false
-ARG GO_VERSION=1.23.4
+ARG GO_VERSION=1.26.2
 RUN if [ "${INSTALL_GO}" = "true" ]; then \
       GOARCH=$(case "${TARGETARCH}" in amd64) echo "amd64" ;; arm64) echo "arm64" ;; *) echo "amd64" ;; esac) && \
       curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-${GOARCH}.tar.gz" | tar -C /usr/local -xz && \

check-versions.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# check-versions.sh — Compare pinned versions in Dockerfile against latest releases
+# Run before tagging a release to see what can be bumped.
+set -euo pipefail
+
+BOLD="\033[1m"; DIM="\033[2m"; GREEN="\033[32m"; YELLOW="\033[33m"; RESET="\033[0m"
+
+DOCKERFILE="${1:-Dockerfile}"
+
+if [[ ! -f "$DOCKERFILE" ]]; then
+  echo "Usage: $0 [Dockerfile]"
+  exit 1
+fi
+
+get_pinned() {
+  grep "^ARG $1=" "$DOCKERFILE" | head -1 | cut -d= -f2
+}
+
+get_latest_github() {
+  local repo="$1"
+  local tag
+  tag=$(curl -s "https://api.github.com/repos/${repo}/releases/latest" | jq -r '.tag_name // empty')
+  # Strip leading 'v' if present
+  echo "${tag#v}"
+}
+
+get_latest_go() {
+  curl -s "https://go.dev/dl/?mode=json" | jq -r '.[0].version' | sed 's/^go//'
+}
+
+get_latest_npm() {
+  npm view "$1" version 2>/dev/null
+}
+
+check() {
+  local name="$1" current="$2" latest="$3"
+  if [[ -z "$latest" ]]; then
+    printf "  ${DIM}%-20s %-12s  (could not check)${RESET}\n" "$name" "$current"
+  elif [[ "$current" == "$latest" ]]; then
+    printf "  ${GREEN}%-20s %-12s  ✓ up to date${RESET}\n" "$name" "$current"
+  else
+    printf "  ${YELLOW}${BOLD}%-20s %-12s  → %s available${RESET}\n" "$name" "$current" "$latest"
+  fi
+}
+
+echo ""
+echo -e "${BOLD}Version check for $DOCKERFILE${RESET}"
+echo ""
+
+# GitHub-sourced binaries
+check "opencode"  "$(get_pinned OPENCODE_VERSION)" "$(get_latest_npm opencode-ai)"
+check "gosu"      "$(get_pinned GOSU_VERSION)"      "$(get_latest_github tianon/gosu)"
+check "fzf"       "$(get_pinned FZF_VERSION)"        "$(get_latest_github junegunn/fzf)"
+check "git-lfs"   "$(get_pinned GIT_LFS_VERSION)"    "$(get_latest_github git-lfs/git-lfs)"
+check "neovim"    "$(get_pinned NVIM_VERSION)"        "$(get_latest_github neovim/neovim)"
+check "bat"       "$(get_pinned BAT_VERSION)"         "$(get_latest_github sharkdp/bat)"
+check "eza"       "$(get_pinned EZA_VERSION)"         "$(get_latest_github eza-community/eza)"
+check "zoxide"    "$(get_pinned ZOXIDE_VERSION)"      "$(get_latest_github ajeetdsouza/zoxide)"
+check "uv"        "$(get_pinned UV_VERSION)"          "$(get_latest_github astral-sh/uv)"
+check "Go (opt)"  "$(get_pinned GO_VERSION)"          "$(get_latest_go)"
+
+echo ""
+echo -e "${DIM}Node.js uses major version ($(get_pinned NODE_VERSION)) — auto-updates via nodesource.${RESET}"
+echo -e "${DIM}rustup-init uses latest from static.rust-lang.org — no pinned version.${RESET}"
+echo -e "${DIM}Debian apt packages update on each build via apt-get update.${RESET}"
+echo ""