core: refine cleanup_lxc to safely clear caches (#11197)

Updated the cleanup_lxc function to directly remove cache directories for Python, Node.js, Go, Rust, Ruby, and PHP, instead of relying on package manager commands. Improved error handling to prevent cleanup failures from affecting installs, and clarified documentation to reflect safer, more targeted cache removal.

misc/core.func

@@ -815,11 +815,9 @@ is_verbose_mode() {
 # ------------------------------------------------------------------------------
 # cleanup_lxc()
 #
-# - Comprehensive cleanup of package managers, caches, and logs
-# - Supports Alpine (apk), Debian/Ubuntu (apt), and language package managers
-# - Cleans: Python (pip/uv), Node.js (npm/yarn/pnpm), Go, Rust, Ruby, PHP
-# - Truncates log files and vacuums systemd journal
-# - Run at end of container creation to minimize disk usage
+# - Cleans package manager and language caches (safe for installs AND updates)
+# - Supports Alpine (apk), Debian/Ubuntu (apt), Python, Node.js, Go, Rust, Ruby, PHP
+# - Uses fallback error handling to prevent cleanup failures from breaking installs
 # ------------------------------------------------------------------------------
 cleanup_lxc() {
   msg_info "Cleaning up"
@@ -828,32 +826,52 @@ cleanup_lxc() {
     $STD apk cache clean || true
     rm -rf /var/cache/apk/*
   else
-    $STD apt -y autoremove || true
-    $STD apt -y autoclean || true
-    $STD apt -y clean || true
+    $STD apt -y autoremove 2>/dev/null || msg_warn "apt autoremove failed (non-critical)"
+    $STD apt -y autoclean 2>/dev/null || msg_warn "apt autoclean failed (non-critical)"
+    $STD apt -y clean 2>/dev/null || msg_warn "apt clean failed (non-critical)"
   fi
 
-  # Clear temp artifacts (keep sockets/FIFOs; ignore errors)
   find /tmp /var/tmp -type f -name 'tmp*' -delete 2>/dev/null || true
   find /tmp /var/tmp -type f -name 'tempfile*' -delete 2>/dev/null || true
 
-  # Node.js npm - directly remove cache directory
-  # npm cache clean/verify can fail with ENOTEMPTY errors, so we skip them
+  # Python
+  if command -v pip &>/dev/null; then
+    rm -rf /root/.cache/pip 2>/dev/null || true
+  fi
+  if command -v uv &>/dev/null; then
+    rm -rf /root/.cache/uv 2>/dev/null || true
+  fi
+
+  # Node.js
   if command -v npm &>/dev/null; then
     rm -rf /root/.npm/_cacache /root/.npm/_logs 2>/dev/null || true
   fi
-  # Node.js yarn
-  if command -v yarn &>/dev/null; then yarn cache clean &>/dev/null || true; fi
-  # Node.js pnpm
-  if command -v pnpm &>/dev/null; then pnpm store prune &>/dev/null || true; fi
-  # Go
-  if command -v go &>/dev/null; then $STD go clean -cache -modcache || true; fi
-  # Rust cargo
-  if command -v cargo &>/dev/null; then $STD cargo clean || true; fi
-  # Ruby gem
-  if command -v gem &>/dev/null; then $STD gem cleanup || true; fi
-  # Composer (PHP)
-  if command -v composer &>/dev/null; then COMPOSER_ALLOW_SUPERUSER=1 $STD composer clear-cache || true; fi
+  if command -v yarn &>/dev/null; then
+    rm -rf /root/.cache/yarn /root/.yarn/cache 2>/dev/null || true
+  fi
+  if command -v pnpm &>/dev/null; then
+    pnpm store prune &>/dev/null || true
+  fi
+
+  # Go (only build cache, not modules)
+  if command -v go &>/dev/null; then
+    $STD go clean -cache 2>/dev/null || true
+  fi
+
+  # Rust (only registry cache, not build artifacts)
+  if command -v cargo &>/dev/null; then
+    rm -rf /root/.cargo/registry/cache /root/.cargo/.package-cache 2>/dev/null || true
+  fi
+
+  # Ruby
+  if command -v gem &>/dev/null; then
+    rm -rf /root/.gem/cache 2>/dev/null || true
+  fi
+
+  # PHP
+  if command -v composer &>/dev/null; then
+    rm -rf /root/.composer/cache 2>/dev/null || true
+  fi
 
   msg_ok "Cleaned"
 }