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macOS Catalina 以降 zsh のコマンド実行履歴が消えてしまう件

※ この記事は以下の時点における情報です。

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.15
BuildVersion:   19A583

$ zsh --version
zsh 5.7.1 (x86_64-apple-darwin19.0.0)

macOS Catalina から標準のシェルが zsh になる関係で、 /etc 配下にあった zsh 関連の設定ファイルが拡充されたらしい。

$ ls -la /etc/ | grep zsh
-r--r--r--    1 root  wheel    3094  8 25 08:03 zshrc
-rw-r--r--    1 root  wheel     911  9  4 10:31 zshrc_Apple_Terminal
/etc/zshrc
# System-wide profile for interactive zsh(1) shells.

# Setup user specific overrides for this in ~/.zhsrc. See zshbuiltins(1)
# and zshoptions(1) for more details.

# Correctly display UTF-8 with combining characters.
if [[ "$(locale LC_CTYPE)" == "UTF-8" ]]; then
    setopt COMBINING_CHARS
fi

# Disable the log builtin, so we don't conflict with /usr/bin/log
disable log

# Save command history
HISTFILE=${ZDOTDIR:-$HOME}/.zsh_history
HISTSIZE=2000
SAVEHIST=1000

# Beep on error
setopt BEEP

# Use keycodes (generated via zkbd) if present, otherwise fallback on
# values from terminfo
if [[ -r ${ZDOTDIR:-$HOME}/.zkbd/${TERM}-${VENDOR} ]] ; then
    source ${ZDOTDIR:-$HOME}/.zkbd/${TERM}-${VENDOR}
else
    typeset -g -A key

    [[ -n "$terminfo[kf1]" ]] && key[F1]=$terminfo[kf1]
    [[ -n "$terminfo[kf2]" ]] && key[F2]=$terminfo[kf2]
    [[ -n "$terminfo[kf3]" ]] && key[F3]=$terminfo[kf3]
    [[ -n "$terminfo[kf4]" ]] && key[F4]=$terminfo[kf4]
    [[ -n "$terminfo[kf5]" ]] && key[F5]=$terminfo[kf5]
    [[ -n "$terminfo[kf6]" ]] && key[F6]=$terminfo[kf6]
    [[ -n "$terminfo[kf7]" ]] && key[F7]=$terminfo[kf7]
    [[ -n "$terminfo[kf8]" ]] && key[F8]=$terminfo[kf8]
    [[ -n "$terminfo[kf9]" ]] && key[F9]=$terminfo[kf9]
    [[ -n "$terminfo[kf10]" ]] && key[F10]=$terminfo[kf10]
    [[ -n "$terminfo[kf11]" ]] && key[F11]=$terminfo[kf11]
    [[ -n "$terminfo[kf12]" ]] && key[F12]=$terminfo[kf12]
    [[ -n "$terminfo[kf13]" ]] && key[F13]=$terminfo[kf13]
    [[ -n "$terminfo[kf14]" ]] && key[F14]=$terminfo[kf14]
    [[ -n "$terminfo[kf15]" ]] && key[F15]=$terminfo[kf15]
    [[ -n "$terminfo[kf16]" ]] && key[F16]=$terminfo[kf16]
    [[ -n "$terminfo[kf17]" ]] && key[F17]=$terminfo[kf17]
    [[ -n "$terminfo[kf18]" ]] && key[F18]=$terminfo[kf18]
    [[ -n "$terminfo[kf19]" ]] && key[F19]=$terminfo[kf19]
    [[ -n "$terminfo[kf20]" ]] && key[F20]=$terminfo[kf20]
    [[ -n "$terminfo[kbs]" ]] && key[Backspace]=$terminfo[kbs]
    [[ -n "$terminfo[kich1]" ]] && key[Insert]=$terminfo[kich1]
    [[ -n "$terminfo[kdch1]" ]] && key[Delete]=$terminfo[kdch1]
    [[ -n "$terminfo[khome]" ]] && key[Home]=$terminfo[khome]
    [[ -n "$terminfo[kend]" ]] && key[End]=$terminfo[kend]
    [[ -n "$terminfo[kpp]" ]] && key[PageUp]=$terminfo[kpp]
    [[ -n "$terminfo[knp]" ]] && key[PageDown]=$terminfo[knp]
    [[ -n "$terminfo[kcuu1]" ]] && key[Up]=$terminfo[kcuu1]
    [[ -n "$terminfo[kcub1]" ]] && key[Left]=$terminfo[kcub1]
    [[ -n "$terminfo[kcud1]" ]] && key[Down]=$terminfo[kcud1]
    [[ -n "$terminfo[kcuf1]" ]] && key[Right]=$terminfo[kcuf1]
fi

# Default key bindings
[[ -n ${key[Delete]} ]] && bindkey "${key[Delete]}" delete-char
[[ -n ${key[Home]} ]] && bindkey "${key[Home]}" beginning-of-line
[[ -n ${key[End]} ]] && bindkey "${key[End]}" end-of-line
[[ -n ${key[Up]} ]] && bindkey "${key[Up]}" up-line-or-search
[[ -n ${key[Down]} ]] && bindkey "${key[Down]}" down-line-or-search

# Default prompt
PS1="%n@%m %1~ %# "

# Useful support for interacting with Terminal.app or other terminal programs
[ -r "/etc/zshrc_$TERM_PROGRAM" ] && . "/etc/zshrc_$TERM_PROGRAM"

Catalina 以降、上記の設定に HISTFILE が(おそらく)追加された影響で、コマンド履歴の保存先が ~/.zhistory から ~/.zsh_history へと切り替わっているのが原因。

prezro のこのコミット以降、既に設定されている HISTFILE の値を優先するようになっている。

modules/history/init.zsh
-HISTFILE="${ZDOTDIR:-$HOME}/.zhistory"  # The path to the history file.
+HISTFILE="${HISTFILE:-${ZDOTDIR:-$HOME}/.zhistory}"  # The path to the history file.

とりあえずIssue で聞いたワークアラウンドで最終的な HISTFILE の値を元に戻してやることで解決。

~/.zshrc
#
# Workaround for: https://github.com/sorin-ionescu/prezto/issues/1744
#
export HISTFILE="${ZDOTDIR:-$HOME}/.zhistory" # The path to the history file.

まあどっちに書き込まれようがどっちでも良いが...

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