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submitted 1 year ago by vfclists@alien.top to c/emacs

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I want to convert the timestamps in a .zsh_history file to their readable equivalents.

Is there some search and replace I can do in emacs that will replace the time with something like (format-time-string unixtime)?

: 1568128379:0;cp -a ~/.zshrc.pre-oh-my-zsh ~/.zshrc
: 1568128381:0;exit

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[–] vfclists@alien.top 1 points 1 year ago

Here is the solution for my .zsh_history example:

I first created a small function for the unix time string. More of the functionality in the replacement string can be included if preferred.

    (defun rgx-get-time-string (unixtimestr)
     (format-time-string "%Y-%m-%d %H:%M" (string-to-number unixtimestr))
      )

The search string: \(: \)\([0-9]\{10\}\)\(:0;\)

The replacement string: \,(concat (format "%6d " (line-number-at-pos)) (rgx-get-time-string (match-string 2)) " "))

(match-string 2) is an alternative for the back reference for the second string matched\2