From dab1d11fb2bca3b7ef96fa6d4ad0eefa8e0b782b Mon Sep 17 00:00:00 2001
From: Typas Liao <r14944052@csie.ntu.edu.tw>
Date: Thu, 2 Jul 2026 16:59:22 +0800
Subject: [PATCH] fix(init): default to no system upgrade to protect shared
 servers

Bootstrap ran a full system upgrade every time (dnf update, apt-get
upgrade, zypper dup, pacman -Syu), disrupting other users on shared
servers. Flip the justfile `update` default to "false" so `just init`
skips upgrade blocks, and reduce init.sh to a package-index refresh
instead of a full upgrade. Full upgrade stays opt-in via
`just update=true init`.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 init.sh  | 89 +++++++++++++++++++++++++++++---------------------------
 justfile |  2 +-
 2 files changed, 47 insertions(+), 44 deletions(-)

diff --git a/init.sh b/init.sh
index 7947733..7a98c56 100644
--- a/init.sh
+++ b/init.sh
@@ -8,56 +8,59 @@ OS="unknown"
 # detect OS
 KERNEL=$(uname -s)
 case $KERNEL in
-    Darwin)
-        OS=mac ;;
-    Linux)
-        OS="$(grep "^ID=" /etc/os-release | sed 's/ID=//;s/^"//;s/"$//')" ;;
-    *)
-        echo "unsupported system ($KERNEL)"
-        exit 1
+Darwin)
+  OS=mac
+  ;;
+Linux)
+  OS="$(grep "^ID=" /etc/os-release | sed 's/ID=//;s/^"//;s/"$//')"
+  ;;
+*)
+  echo "unsupported system ($KERNEL)"
+  exit 1
+  ;;
 esac
 
-# update package manager and install just
+# refresh package index and install just
 case "$OS" in
-    mac)
-        if ! command -v nix &>/dev/null; then
-            sh <(curl -L https://nixos.org/nix/install) --daemon
-            if [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
-                . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
-            fi
-        fi
-        mkdir -p "$HOME/.config/nix"
-        if ! grep -q "experimental-features" "$HOME/.config/nix/nix.conf" 2>/dev/null; then
-            echo "experimental-features = nix-command flakes" >> "$HOME/.config/nix/nix.conf"
-        fi
-        ;;
-    fedora)
-        sudo dnf update -y
-        ;;
-    opensuse-tumbleweed)
-        sudo zypper dup -y
-        ;;
-    cachyos)
-        sudo pacman -Syu --noconfirm
-        ;;
-    ubuntu|debian)
-        sudo apt-get update
-        sudo apt-get upgrade -y
-        ;;
-    *)
-        echo "unsupported system ($OS)"
-        exit 1
+mac)
+  if ! command -v nix &>/dev/null; then
+    sh <(curl -L https://nixos.org/nix/install) --daemon
+    if [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
+      . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+    fi
+  fi
+  mkdir -p "$HOME/.config/nix"
+  if ! grep -q "experimental-features" "$HOME/.config/nix/nix.conf" 2>/dev/null; then
+    echo "experimental-features = nix-command flakes" >>"$HOME/.config/nix/nix.conf"
+  fi
+  ;;
+fedora)
+  sudo dnf makecache
+  ;;
+opensuse-tumbleweed)
+  sudo zypper refresh
+  ;;
+cachyos)
+  sudo pacman -Sy --noconfirm
+  ;;
+ubuntu | debian)
+  sudo apt-get update
+  ;;
+*)
+  echo "unsupported system ($OS)"
+  exit 1
+  ;;
 esac
 
 # install just if not present
 if ! command -v just &>/dev/null; then
-    case "$OS" in
-        mac)       nix profile add nixpkgs#just ;;
-        fedora)    sudo dnf install -y just ;;
-        opensuse-tumbleweed) sudo zypper in -y just ;;
-        cachyos)   sudo pacman -S --noconfirm just ;;
-        ubuntu|debian) sudo apt-get install -y just ;;
-    esac
+  case "$OS" in
+  mac) nix profile add nixpkgs#just ;;
+  fedora) sudo dnf install -y just ;;
+  opensuse-tumbleweed) sudo zypper in -y just ;;
+  cachyos) sudo pacman -S --noconfirm just ;;
+  ubuntu | debian) sudo apt-get install -y just ;;
+  esac
 fi
 
 # hand off to justfile
diff --git a/justfile b/justfile
index 8c5bd9c..ca43a5d 100644
--- a/justfile
+++ b/justfile
@@ -3,7 +3,7 @@
 root := justfile_directory()
 
 os := if os() == "macos" { "mac" } else { `grep "^ID=" /etc/os-release | sed 's/ID=//;s/^"//;s/"$//'` }
-update := "true"
+update := "false"
 
 # Show available recipes
 help: