#--------------------------------------------------------------------# # Match Previous Command Suggestion Strategy # #--------------------------------------------------------------------# # Suggests the most recent history item that matches the given # prefix and whose preceding history item also matches the most # recently executed command. # # For example, suppose your history has the following entries: # - pwd # - ls foo # - ls bar # - pwd # # Given the history list above, when you type 'ls', the suggestion # will be 'ls foo' rather than 'ls bar' because your most recently # executed command (pwd) was previously followed by 'ls foo'. # # Note that this strategy won't work as expected with ZSH options that don't # preserve the history order such as `HIST_IGNORE_ALL_DUPS` or # `HIST_EXPIRE_DUPS_FIRST`. _zsh_autosuggest_strategy_match_prev_cmd() { # Reset options to defaults and enable LOCAL_OPTIONS emulate -L zsh # Enable globbing flags so that we can use (#m) and (x~y) glob operator setopt EXTENDED_GLOB # TODO: Use (b) flag when we can drop support for zsh older than v5.0.8 local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}" # Get the history items that match the prefix, excluding those that match # the ignore pattern local pattern="$prefix*" if [[ -n $ZSH_AUTOSUGGEST_HISTORY_IGNORE ]]; then pattern="($pattern)~($ZSH_AUTOSUGGEST_HISTORY_IGNORE)" fi # Get all history event numbers that correspond to history # entries that match the pattern local history_match_keys history_match_keys=(${(k)history[(R)$~pattern]}) # By default we use the first history number (most recent history entry) local histkey="${history_match_keys[1]}" # Get the previously executed command local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")" # Iterate up to the first 200 history event numbers that match $prefix for key in "${(@)history_match_keys[1,200]}"; do # Stop if we ran out of history [[ $key -gt 1 ]] || break # See if the history entry preceding the suggestion matches the # previous command, and use it if it does if [[ "${history[$((key - 1))]}" == "$prev_cmd" ]]; then histkey="$key" break fi done # Give back the matched history entry typeset -g suggestion="$history[$histkey]" }