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history: Move HISTFILE path to more conventional one

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Change default `HISTFILE` path from `~/.zhistory` to more conventional
`~/.zsh_history`. This aligns better with Debian variants, macOS and
Oh My Zsh.

This would provide an easier onboarding experience to users coming to
Prezto from standard (framework free) zsh or from Oh My Zsh.

For existing Prezto users, we attempt to automatically rename old
`HISTFILE` to new one iff the old one exists and the new one doesn't.
However, if both old and new `HISTFILE` exist and the old one is more
recent, we just alert the user about what changed with a suggested way
to accommodate the change.
This commit is contained in:
Indrajit Raychaudhuri 2021-05-01 22:27:00 -05:00 committed by Indrajit Raychaudhuri
parent 1d1ae0a661
commit 509c5ca80f
2 changed files with 36 additions and 8 deletions
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17
modules/history/README.md
View File

@ -3,10 +3,13 @@ History
Sets [history][1] options and defines history aliases.
**Note:** If you are migrating from [Oh My Zsh][2] and are not on a recent
version of macOS and want to keep your history, you will either need to set
`HISTFILE` manually to `$HOME/.zsh_history` or rename `~/.zsh_history` to
`~/.zhistory`.
**Note:** Default path of `HISTFILE` has changed from `${ZDOTDIR:-$HOME}/.zhistory`
to `${ZDOTDIR:-$HOME}/.zsh_history`. The file will be automatically renamed if
possible (when the new one doesn't exist). Otherwise, if you want to preserve
previous history, you will need to move them from `${ZDOTDIR:-$HOME}/.zhistory`
to `${ZDOTDIR:-$HOME}/.zsh_history`.
Alternately, you can set `HISTFILE` manually to `${ZDOTDIR:-$HOME}/.zhistory`.
Options
-------
@ -40,11 +43,11 @@ Aliases
Authors
-------
*The authors of this module should be contacted via the [issue tracker][3].*
*The authors of this module should be contacted via the [issue tracker][2].*
- [Robby Russell](https://github.com/robbyrussell)
- [Sorin Ionescu](https://github.com/sorin-ionescu)
- [Indrajit Raychaudhuri](https://github.com/indrajitr)
[1]: http://zsh.sourceforge.net/Guide/zshguide02.html#l16
[2]: https://github.com/ohmyzsh/ohmyzsh
[3]: https://github.com/sorin-ionescu/prezto/issues
[2]: https://github.com/sorin-ionescu/prezto/issues

27
modules/history/init.zsh
View File

@ -26,7 +26,7 @@ setopt HIST_BEEP # Beep when accessing non-existent history.
# Variables
#
HISTFILE="${HISTFILE:-${ZDOTDIR:-$HOME}/.zhistory}" # The path to the history file.
HISTFILE="${HISTFILE:-${ZDOTDIR:-$HOME}/.zsh_history}" # The path to the history file.
HISTSIZE=10000 # The maximum number of events to save in the internal history.
SAVEHIST=10000 # The maximum number of events to save in the history file.
@ -36,3 +36,28 @@ SAVEHIST=10000 # The maximum number of events to save in the h
# Lists the ten most used commands.
alias history-stat="history 0 | awk '{print \$2}' | sort | uniq -c | sort -n -r | head"
if [[ -s "${OLD_HISTFILE::=${HISTFILE:h}/.zhistory}" ]]; then
# New 'HISTFILE' doesn't exist yet, rename legacy one if available and notify.
if [[ ! -s "$HISTFILE" ]]; then
<<EON
NOTICE: Default path of 'HISTFILE' has changed from '${OLD_HISTFILE/#$HOME/~}'
to '${HISTFILE/#$HOME/~}'.
Attempting to rename the existing 'HISTFILE' ...
EON
mv -v "$OLD_HISTFILE" "$HISTFILE"
# New 'HISTFILE' does exist and is older than legacy one, just warn.
elif [[ "$OLD_HISTFILE" -nt "$HISTFILE" ]]; then
<<EOW
WARNING: Default path of 'HISTFILE' has changed from '${OLD_HISTFILE/#$HOME/~}'
to '${HISTFILE/#$HOME/~}'.
Either set 'HISTFILE' in '${${0:h}/#$HOME/~}'
or move previous history from '${OLD_HISTFILE/#$HOME/~}' to
'${HISTFILE/#$HOME/~}'.
EOW
fi
unset OLD_HISTFILE
fi