noconnorandClaude Sonnet 5
d4e3121d68
Cross-distro (RHEL/Debian) VM setup: zsh + oh-my-zsh with a self-healing bash fallback for environments that reset the root filesystem or hardcode bash for new terminals (e.g. Kasm Workspaces), plus git identity and HTTPS credential-store configuration. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
88 lines
3.5 KiB
Bash
Executable File
88 lines
3.5 KiB
Bash
Executable File
#!/usr/bin/env sh
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# zsh/install.sh — install zsh + oh-my-zsh and make zsh the login shell.
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# Works on RHEL-family (dnf/yum) and Debian-family (apt) hosts. Idempotent:
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# safe to re-run on a box that already has some/all of this in place.
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set -eu
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SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
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REPO_ROOT="$(dirname -- "$SCRIPT_DIR")"
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# shellcheck source=../lib/os-detect.sh
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. "$REPO_ROOT/lib/os-detect.sh"
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say() { printf '%s\n' "$*" >&2; }
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# --- 1. install zsh ---------------------------------------------------------
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if command -v zsh >/dev/null 2>&1; then
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say "zsh already installed ($(command -v zsh))."
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else
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say "Installing zsh..."
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pkg_install zsh
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fi
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ZSH_BIN="$(command -v zsh)"
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# --- 2. install oh-my-zsh (unattended) --------------------------------------
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if [ -d "$HOME/.oh-my-zsh" ]; then
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say "oh-my-zsh already installed."
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else
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say "Installing oh-my-zsh..."
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command -v curl >/dev/null 2>&1 || pkg_install curl
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RUNZSH=no CHSH=no KEEP_ZSHRC=yes \
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sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
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fi
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# --- 3. install our .zshrc ---------------------------------------------------
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DEST="$HOME/.zshrc"
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SRC="$SCRIPT_DIR/zshrc"
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if [ -f "$DEST" ] && ! cmp -s "$SRC" "$DEST"; then
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BACKUP="$DEST.bak.$(date +%Y%m%d%H%M%S 2>/dev/null || printf 'pre-dotfiles')"
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say "Backing up existing $DEST -> $BACKUP"
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cp "$DEST" "$BACKUP"
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fi
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cp "$SRC" "$DEST"
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say "Installed $DEST"
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# --- 4. make zsh the login shell --------------------------------------------
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if ! grep -qxF "$ZSH_BIN" /etc/shells 2>/dev/null; then
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say "Adding $ZSH_BIN to /etc/shells"
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echo "$ZSH_BIN" | sudo tee -a /etc/shells >/dev/null
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fi
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CURRENT_SHELL="$(getent passwd "$(id -un)" 2>/dev/null | cut -d: -f7)"
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if [ "$CURRENT_SHELL" = "$ZSH_BIN" ]; then
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say "zsh is already the login shell."
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else
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say "Changing login shell to $ZSH_BIN"
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# Use usermod (root, via sudo) instead of chsh: chsh runs its own PAM
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# authentication for the invoking user's password, which fails with a PAM
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# error in minimal containers (e.g. Kasm images) even when sudo itself is
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# passwordless. usermod edits /etc/passwd directly as root, no PAM prompt.
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sudo usermod -s "$ZSH_BIN" "$(id -un)"
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fi
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# --- 5. bash fallback: auto-exec into zsh -----------------------------------
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# Some environments (e.g. Kasm Workspaces) hardcode/inherit bash for new
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# terminals regardless of the /etc/passwd shell, and reset the root
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# filesystem (including installed packages and /etc/passwd) on rebuild while
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# keeping $HOME. Sourcing this from ~/.bashrc — which lives in $HOME — makes
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# every fresh bash self-heal into zsh, reinstalling it first if needed.
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BASHRC="$HOME/.bashrc"
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HOOK_MARKER="# >>> dotfiles zsh auto-exec >>>"
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if [ -f "$BASHRC" ] && grep -qF "$HOOK_MARKER" "$BASHRC" 2>/dev/null; then
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say "bash auto-exec hook already present in $BASHRC."
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else
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say "Adding zsh auto-exec hook to $BASHRC (covers terminals that always spawn bash)."
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{
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printf '\n%s\n' "$HOOK_MARKER"
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printf '%s\n' "# Re-exec into zsh for interactive shells, self-healing (reinstalling"
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printf '%s\n' "# zsh) if this container's root filesystem was reset since last run."
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printf '%s\n' 'if [ -n "$PS1" ] && [ -z "${ZSH_VERSION:-}" ]; then'
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printf ' %s\n' "command -v zsh >/dev/null 2>&1 || \"$SCRIPT_DIR/install.sh\" >/dev/null 2>&1 || true"
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printf ' %s\n' 'command -v zsh >/dev/null 2>&1 && exec zsh -l'
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printf '%s\n' 'fi'
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printf '%s\n' "# <<< dotfiles zsh auto-exec <<<"
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} >> "$BASHRC"
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fi
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say "Done. Open a new terminal to use zsh."
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