fix(shell): bind arrows directly for bash history search

The macro form `"\e[A": "\C-x\C-p\C-e"` ran history-search-backward then
end-of-line to mimic zsh's cursor-at-end. But history-search-* takes its
prefix from start-of-line to point, and `\C-e` moves point to the end, so
the next Up searched for the whole recalled line, found nothing, and left
Up/Down dead after one press. Bind arrows straight to the search functions;
pure readline has no history-search-end widget, so cursor lands at the
prefix boundary.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -0,0 +1,23 @@
+# dotfiles
+
+Designed around [GNU stow][gnu stow manual].
+For `zsh` or `bash` (or both). Include `shell/` always.
+
+## Install
+
+```sh
+git clone <repo> ~/.dotfiles
+cd ~/.dotfiles
+stow shell zsh # or: stow shell bash
+```
+
+## Update
+
+```sh
+cd ~/.dotfiles
+git pull
+stow -R shell zsh # restow this host's packages
+```
+
+[gnu stow manual]: https://www.gnu.org/software/stow/manual/stow.html
+

bash/.bash_profile

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+# Bash login shell. Everything a non-login shell gets lives in ~/.bashrc, so
+# source it, then add login-only bits.
+[ -r ~/.bashrc ] && . ~/.bashrc
+
+# pyenv shims dir (login only); PYENV_ROOT comes from ~/.config/shell/exports.
+command -v pyenv >/dev/null 2>&1 && eval "$(pyenv init --path)"

bash/.bashrc

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+# Loaded by every interactive bash, and by login bash via ~/.bash_profile.
+# Source env first (idempotent — covers non-login interactive shells that bash
+# would otherwise start without it), then the real interactive config.
+[ -r ~/.profile ] && . ~/.profile
+[ -r ~/.config/bash/rc ] && . ~/.config/bash/rc

bash/.config/bash/prompt

@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+
+# Source: https://github.com/mathiasbynens/dotfiles/
+
+# Shell prompt based on the Solarized Dark theme.
+# Screenshot: http://i.imgur.com/EkEtphC.png
+# Heavily inspired by @necolas’s prompt: https://github.com/necolas/dotfiles
+# iTerm → Profiles → Text → use 13pt Monaco with 1.1 vertical spacing.
+
+# If not running interactively, don't do anything
+[[ $- != *i* ]] && return
+
+if [[ $COLORTERM = gnome-* && $TERM = xterm ]] && infocmp gnome-256color >/dev/null 2>&1; then
+	export TERM='gnome-256color';
+elif infocmp xterm-256color >/dev/null 2>&1; then
+	export TERM='xterm-256color';
+fi;
+
+prompt_git() {
+	local s='';
+	local branchName='';
+
+	# Check if the current directory is in a Git repository.
+	git rev-parse --is-inside-work-tree &>/dev/null || return;
+
+	# Check for what branch we’re on.
+	# Get the short symbolic ref. If HEAD isn’t a symbolic ref, get a
+	# tracking remote branch or tag. Otherwise, get the
+	# short SHA for the latest commit, or give up.
+	branchName="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \
+		git describe --all --exact-match HEAD 2> /dev/null || \
+		git rev-parse --short HEAD 2> /dev/null || \
+		echo '(unknown)')";
+
+	# Early exit for Chromium & Blink repo, as the dirty check takes too long.
+	# Thanks, @paulirish!
+	# https://github.com/paulirish/dotfiles/blob/dd33151f/.bash_prompt#L110-L123
+	repoUrl="$(git config --get remote.origin.url)";
+	if grep -q 'chromium/src.git' <<< "${repoUrl}"; then
+		s+='*';
+	else
+		# Check for uncommitted changes in the index.
+		if ! $(git diff --quiet --ignore-submodules --cached); then
+			s+='+';
+		fi;
+		# Check for unstaged changes.
+		if ! $(git diff-files --quiet --ignore-submodules --); then
+			s+='!';
+		fi;
+		# Check for untracked files.
+		if [ -n "$(git ls-files --others --exclude-standard)" ]; then
+			s+='?';
+		fi;
+		# Check for stashed files.
+		if $(git rev-parse --verify refs/stash &>/dev/null); then
+			s+='$';
+		fi;
+	fi;
+
+	[ -n "${s}" ] && s=" [${s}]";
+
+	echo -e "${1}${branchName}${2}${s}";
+}
+
+if tput setaf 1 &> /dev/null; then
+	tput sgr0; # reset colors
+	bold=$(tput bold);
+	reset=$(tput sgr0);
+	# Solarized colors, taken from http://git.io/solarized-colors.
+	black=$(tput setaf 0);
+	blue=$(tput setaf 33);
+	cyan=$(tput setaf 37);
+	green=$(tput setaf 64);
+	orange=$(tput setaf 166);
+	purple=$(tput setaf 125);
+	red=$(tput setaf 124);
+	violet=$(tput setaf 61);
+	white=$(tput setaf 15);
+	yellow=$(tput setaf 136);
+else
+	bold='';
+	reset="\e[0m";
+	black="\e[1;30m";
+	blue="\e[1;34m";
+	cyan="\e[1;36m";
+	green="\e[1;32m";
+	orange="\e[1;33m";
+	purple="\e[1;35m";
+	red="\e[1;31m";
+	violet="\e[1;35m";
+	white="\e[1;37m";
+	yellow="\e[1;33m";
+fi;
+
+# Highlight the user name when logged in as root.
+if [[ "${USER}" == "root" ]]; then
+	userStyle="${red}";
+else
+	userStyle="${orange}";
+fi;
+
+# Highlight the hostname when connected via SSH.
+if [[ "${SSH_TTY}" ]]; then
+	hostStyle="${bold}${red}";
+else
+	hostStyle="${yellow}";
+fi;
+
+# Set the terminal title and prompt.
+PS1="\[\033]0;\W\007\]"; # working directory base name
+PS1+="\[${bold}\]\n"; # newline
+PS1+="\[${userStyle}\]\u"; # username
+PS1+="\[${white}\] at ";
+PS1+="\[${hostStyle}\]\h"; # host
+PS1+="\[${white}\] in ";
+PS1+="\[${green}\]\w"; # working directory full path
+PS1+="\$(prompt_git \"\[${white}\] on \[${violet}\]\" \"\[${blue}\]\")"; # Git repository details
+PS1+="\n";
+PS1+="\[${white}\]\$ \[${reset}\]"; # `$` (and reset color)
+export PS1;
+
+PS2="\[${yellow}\]→ \[${reset}\]";
+export PS2;

bash/.config/bash/rc

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+# Mostly copied from: https://github.com/mathiasbynens/dotfiles/
+
+# Shared interactive config (aliases, functions, pyenv shims):
+[ -r ~/.config/shell/interactive ] && source ~/.config/shell/interactive
+
+# Bash-specific:
+[ -f ~/.config/bash/prompt ] && source ~/.config/bash/prompt
+
+# Case-insensitive globbing (used in pathname expansion)
+shopt -s nocaseglob;
+
+# Append to the Bash history file, rather than overwriting it.
+# (HISTFILE/HISTSIZE/HISTFILESIZE/HISTCONTROL come from ~/.config/shell/exports.)
+shopt -s histappend;
+
+# Autocorrect typos in path names when using `cd`
+shopt -s cdspell;
+
+# Enable some Bash 4 features when possible:
+# * `autocd`, e.g. `**/qux` will enter `./foo/bar/baz/qux`
+# * Recursive globbing, e.g. `echo **/*.txt`
+for option in autocd globstar; do
+	shopt -s "$option" 2> /dev/null;
+done;
+
+# Add tab completion for many Bash commands
+if which brew &> /dev/null && [ -r "$(brew --prefix)/etc/profile.d/bash_completion.sh" ]; then
+	# Ensure existing Homebrew v1 completions continue to work
+	export BASH_COMPLETION_COMPAT_DIR="$(brew --prefix)/etc/bash_completion.d";
+	source "$(brew --prefix)/etc/profile.d/bash_completion.sh";
+elif [ -f /etc/bash_completion ]; then
+	source /etc/bash_completion;
+fi;
+
+# Enable tab completion for `g` by marking it as an alias for `git`
+if type _git &> /dev/null; then
+	complete -o default -o nospace -F _git g;
+fi;
+
+# Add tab completion for SSH hostnames based on ~/.ssh/config, ignoring wildcards
+[ -e "$HOME/.ssh/config" ] && complete -o "default" -o "nospace" -W "$(grep "^Host" ~/.ssh/config | grep -v "[?*]" | cut -d " " -f2- | tr ' ' '\n')" scp sftp ssh;
+
+# Add tab completion for `defaults read|write NSGlobalDomain`
+# You could just use `-g` instead, but I like being explicit
+complete -W "NSGlobalDomain" defaults;

shell/.config/readline/inputrc

@@ -0,0 +1,20 @@
+# Readline config (bash line editing + any readline program: python, psql...).
+# Set via $INPUTRC; see shell/exports. zsh ignores this (uses ZLE); its
+# equivalent prefix-search bindings live in zsh/.zshrc.
+#
+# Pull in distro defaults; a custom INPUTRC otherwise replaces them entirely.
+$include /etc/inputrc
+
+# zsh-style prefix history search: type a prefix, Up/Down walk matching
+# history entries. Empty prefix = previous/next.
+#
+# Bind arrows straight to the search functions. Do NOT wrap in a macro that
+# appends end-of-line (\C-e) to mimic zsh's cursor-at-end: \C-e moves point to
+# the line end, and history-search-* takes its prefix from start-of-line to
+# point -- so the next press searches for the whole recalled line, finds
+# nothing, and Up/Down go dead. Pure readline has no history-search-end widget;
+# cursor lands at the prefix boundary, which is readline's intended behavior.
+"\e[A": history-search-backward
+"\e[B": history-search-forward
+"\eOA": history-search-backward
+"\eOB": history-search-forward

shell/.config/shell/exports

@@ -7,8 +7,14 @@ export XDG_CACHE_HOME="$HOME/.cache"
 # Default editor
 export EDITOR='vim'
 
-# Shell history file
+# Shell history (env vars both shells read; each ignores the other's by name —
+# zsh uses SAVEHIST, bash uses HISTFILESIZE/HISTCONTROL. zsh dedup is a setopt,
+# not an env var, so it stays in .zshrc).
 export HISTFILE="${XDG_CACHE_HOME:-$HOME/.cache}/shell/history"
+export HISTSIZE=1000000        # commands kept in memory (both shells)
+export SAVEHIST=1000000        # zsh: lines written to $HISTFILE
+export HISTFILESIZE=1000000    # bash: lines written to $HISTFILE
+export HISTCONTROL=ignoreboth  # bash: drop dups + space-prefixed
 
 # Global git config file
 export GIT_CONFIG_GLOBAL="${XDG_CONFIG_HOME:-$HOME/.config}/git/config"
@@ -24,11 +30,17 @@ export PYTHONSTARTUP="${XDG_CONFIG_HOME:-$HOME/.config}/python/startup"
 # Custom Python history file
 export PYTHON_HISTFILE="${XDG_CACHE_HOME:-$HOME/.cache}/python/history"
 
+# Pyenv root:
+[ -x "$(command -v pyenv)" ] && export PYENV_ROOT="$HOME/.pyenv"
+
 # PostgreSQL config file
-export PSQLRC="${XDG_CONFIG_HOME:-$HOME/.config}/psql/rc"
+[ -x "$(command -v psql)" ] && export PSQLRC="${XDG_CONFIG_HOME:-$HOME/.config}/psql/rc"
 
 # Wget config file
 export WGETRC="${XDG_CONFIG_HOME:-$HOME/.config}/wget/rc"
 
-# ZSH directory
-export ZDOTDIR="${XDG_CONFIG_HOME:-$HOME/.config}/zsh"
+# Readline config file (bash line editing + any readline program)
+export INPUTRC="${XDG_CONFIG_HOME:-$HOME/.config}/readline/inputrc"
+
+# NOTE: ZDOTDIR lives in ~/.zshenv, not here. It must be set before zsh reads
+# any rc file, and this file is sourced too late for that.

shell/.config/shell/interactive

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Shared interactive shell config. Sourced by both zsh ($ZDOTDIR/.zshrc) and
+# bash (~/.config/bash/rc). Only ever loaded by zsh/bash, so brace expansion is
+# fine here (unlike the POSIX `profile`).
+for _file in "${XDG_CONFIG_HOME:-$HOME/.config}"/shell/{aliases,functions,extra}; do
+	[ -r "$_file" ] && . "$_file"
+done
+unset _file
+
+# Ensure the history dir exists; neither shell mkdir's it, so without this
+# $HISTFILE writes fail silently on a fresh host.
+[ -n "$HISTFILE" ] && mkdir -p "$(dirname "$HISTFILE")"
+
+# pyenv interactive shims (pyenv init - autodetects the running shell):
+command -v pyenv >/dev/null 2>&1 && eval "$(pyenv init -)"

shell/.config/shell/path

@@ -1,4 +1,8 @@
 #!/bin/sh
 
-# Adds `~/.local/bin` to $PATH
-export PATH="$PATH:${$(find ~/.local/bin -type d -printf %p:)%%:}"
+# Prepend ~/.local/bin to $PATH (POSIX, idempotent — safe to source twice).
+case ":$PATH:" in
+	*":$HOME/.local/bin:"*) ;;
+	*) [ -d "$HOME/.local/bin" ] && PATH="$HOME/.local/bin:$PATH" ;;
+esac
+export PATH

shell/.config/shell/profile

@@ -1,9 +1,13 @@
 #!/bin/sh
 
-# Load the shell dotfiles, and then some:
-# * ~/.path can be used to extend `$PATH`.
-# * ~/.extra can be used for other settings you don’t want to commit.
-for file in ~/.config/shell/{path,exports,aliases,functions,extra}; do
-        [ -r "$file" ] && [ -f "$file" ] && source "$file";
-done;
-unset file;
+# POSIX login environment. Sourced directly by a /bin/sh login (display
+# managers, plain sh) and indirectly by bash via ~/.bashrc. Env only — no
+# brace expansion (dash doesn't expand it), no shell-specific rc.
+#
+# Interactive config (aliases, functions, prompt) is loaded by each shell's
+# own rc via ~/.config/shell/interactive, not here.
+for _name in path exports; do
+	_file="${XDG_CONFIG_HOME:-$HOME/.config}/shell/$_name"
+	[ -r "$_file" ] && . "$_file"
+done
+unset _name _file

zsh/.config/zsh/.zprofile

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# zsh login shell only. PATH-level init that belongs to login (pyenv shims dir).
+# PYENV_ROOT is exported earlier in ~/.config/shell/exports.
+command -v pyenv >/dev/null 2>&1 && eval "$(pyenv init --path)"

zsh/.config/zsh/.zshrc

@@ -1,6 +1,10 @@
 # Luke's config for the Zoomer Shell
 # Source (mainly): https://github.com/LukeSmithxyz/voidrice/
 
+# Shared interactive config (aliases, functions, pyenv shims):
+[ -r "${XDG_CONFIG_HOME:-$HOME/.config}/shell/interactive" ] && \
+	. "${XDG_CONFIG_HOME:-$HOME/.config}/shell/interactive"
+
 # Enable colors and change prompt:
 autoload -U colors && colors	# Load colors
 PS1="%B%{$fg[red]%}[%{$fg[yellow]%}%n%{$fg[green]%}@%{$fg[blue]%}%M %{$fg[magenta]%}%~%{$fg[red]%}]%{$reset_color%}$%b "
@@ -8,9 +12,9 @@ setopt autocd		# Automatically cd into typed directory.
 stty stop undef		# Disable ctrl-s to freeze terminal.
 setopt interactive_comments
 
-# History in cache directory:
-HISTSIZE=10000000
-SAVEHIST=10000000
+# HISTFILE/HISTSIZE/SAVEHIST come from ~/.config/shell/exports (shared).
+# Dedup is a setopt, not an env var (bash's HISTCONTROL=ignoreboth equivalent):
+setopt hist_ignore_all_dups hist_ignore_space
 
 # Basic auto/tab complete:
 autoload -U compinit

zsh/.zshenv

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Read first by zsh for EVERY shell (login or not), so this is the only place
+# ZDOTDIR can be set early enough to redirect where zsh looks for its rc files.
+export XDG_CONFIG_HOME="${XDG_CONFIG_HOME:-$HOME/.config}"
+export ZDOTDIR="$XDG_CONFIG_HOME/zsh"
+
+# Shared POSIX environment (idempotent):
+for _name in path exports; do
+	_file="$XDG_CONFIG_HOME/shell/$_name"
+	[ -r "$_file" ] && . "$_file"
+done
+unset _name _file