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validate downloaded zshrc with zsh -n before replacing

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Adds syntax validation via zsh -n to both update_zshrc() and the
auto-update on shell start. Prevents error pages or corrupted content
from overwriting ~/.zshrc and breaking the shell.
This commit is contained in:
jeremy
2026-07-13 00:18:38 -04:00
parent 9d4c2d392c
commit e0598477da
2 changed files with 3 additions and 3 deletions
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zsh/README.md
+1 -1
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@@ -3,7 +3,7 @@
## Files ## Files
### `zshrc` ### `zshrc`
Main Zsh configuration file. Sets up Oh My Zsh, plugins (git, sudo, eza, fzf, starship, etc.), history options, aliases, and auto-updates itself from a remote source. Also bootstraps tmux config and runs a fastfetch system info display on interactive shells. Main Zsh configuration file. Sets up Oh My Zsh, plugins (git, sudo, eza, fzf, starship, etc.), history options, aliases, and auto-updates itself from a remote source. Before replacing `~/.zshrc`, the downloaded file is validated with `zsh -n` to ensure it's syntactically valid — this prevents error pages or corrupted content from breaking the shell. Also bootstraps tmux config and runs a fastfetch system info display on interactive shells.
### `zshrc-bootstrap.zsh` ### `zshrc-bootstrap.zsh`
One-shot setup script executed by `zshrc`. Installs missing dependencies (starship, lazydocker, fastfetch, eza, fzf, etc.) via the system package manager (brew, apt, dnf, pacman) or cargo, clones Oh My Zsh and custom plugins (zsh-autosuggestions, fast-syntax-highlighting, fzf-tab). Runs only when the bootstrap version changes. One-shot setup script executed by `zshrc`. Installs missing dependencies (starship, lazydocker, fastfetch, eza, fzf, etc.) via the system package manager (brew, apt, dnf, pacman) or cargo, clones Oh My Zsh and custom plugins (zsh-autosuggestions, fast-syntax-highlighting, fzf-tab). Runs only when the bootstrap version changes.
zsh/zshrc
+2 -2
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@@ -17,7 +17,7 @@ export ZSHRC_BOOTSTRAP="$ZSH_CONFIG/.bootstrapped"
update_zshrc(){ update_zshrc(){
local tmp=/tmp/.zshrc.$$ local tmp=/tmp/.zshrc.$$
curl -sSL --connect-timeout 5 "$ZSHRC_URL" -o "$tmp" 2>/dev/null || return curl -sSL --connect-timeout 5 "$ZSHRC_URL" -o "$tmp" 2>/dev/null || return
if ! cmp -s "$tmp" "$HOME/.zshrc" 2>/dev/null; then if zsh -n "$tmp" 2>/dev/null && ! cmp -s "$tmp" "$HOME/.zshrc" 2>/dev/null; then
echo "Updating zshrc..." echo "Updating zshrc..."
mv "$tmp" "$HOME/.zshrc" && echo "Updated. Reloading..." && exec zsh mv "$tmp" "$HOME/.zshrc" && echo "Updated. Reloading..." && exec zsh
fi fi
@@ -127,7 +127,7 @@ alias yeet='yay -Rcs'
if [[ -o interactive ]]; then if [[ -o interactive ]]; then
tmp=/tmp/.zshrc.$$ tmp=/tmp/.zshrc.$$
curl -sSL --connect-timeout 3 "$ZSHRC_URL" -o "$tmp" 2>/dev/null curl -sSL --connect-timeout 3 "$ZSHRC_URL" -o "$tmp" 2>/dev/null
if [[ -f "$tmp" ]] && ! cmp -s "$tmp" "$HOME/.zshrc" 2>/dev/null; then if [[ -f "$tmp" ]] && zsh -n "$tmp" 2>/dev/null && ! cmp -s "$tmp" "$HOME/.zshrc" 2>/dev/null; then
echo "Updating zshrc..." echo "Updating zshrc..."
mv "$tmp" "$HOME/.zshrc" && exec zsh mv "$tmp" "$HOME/.zshrc" && exec zsh
fi fi