#!/bin/echo "BASH Source Script ONLY"
# vim:ft=bash
#
# history_edit.bash 
#
# Edit the in-memory BASH history.
#
# This lets me manually look for and remove sensitive information from the
# in-memory bash history, that I may had just recently typed in.  For example
# commands containing passwords, or other cryptographic information, that may
# have (just) been typed on the CLI.
#
# This does NOT write the history file to ".bash_history", only save, edit
# and reload the edited history back into memory.
#
# It would have been better if the information had not been placed into the
# history, for example by using the BASH setting "HISTCONTROL=ignorespace", but
# I never seem to remember to use it.  I could also use "HISTIGNORE=" glob
# patterns, but that never covers all situations.
#
# Also see "history_merge.bash" source script.
#
# WARNING: Before bash version 5, bash would not read timestamped history
# files containing multi-line command correctly.  The mutliple lines would
# become seperate individual entries.
#
###
#
#   he() { source ~/bin/history_edit.bash; }       # edit history
#
###
#
# Anthony Thyssen - 3 July 2019
#

# temprary file for editing the history
histtmp=`mktemp "${TMPDIR:-/tmp}/history_edit.XXXXXXXXXX"`

# Write history to s file so we can edit it.
#history -w "$histtmp"

# # Alt: Write to file for editing, expand timestamps to make it more readable.
history -w /dev/stdout |
  perl -pe '$_ = `date --date=\@$1 +"#\%s - \%F_\%T"`  if /^#(\d+)$/;' \
    > "$histtmp"

vim + "$histtmp"                      # edit the history, (start on last line)

# Remove readable timestamp from edited file
#
# BASH does not use the extra data in timestamp lines, but also preserves them,
# which can cause problems in other programs dealing with history.
perl -i -pe 's/^(#\d+).*/$1/' "$histtmp"

# replace in-memory history with edited history
history -c                            # clear the current shells history list
history -r "$histtmp"                 # read everything from the history file

shred -u "$histtmp" || rm "$histtmp"  # clean up
unset histtmp