newline-fix.bash: Force the bash prompt to start after a newline

[Scripts/git/.git] / bash / newline-fix.bash

diff --git a/bash/newline-fix.bash b/bash/newline-fix.bash
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+++ b/bash/newline-fix.bash
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+# newline-fix.bash: Force the bash prompt to start after a newline
+# http://snippets.scripts.mit.edu/gitweb.cgi/.git/blob/HEAD:/bash/newline-fix.bash
+#
+# Some commands don’t print a newline at the end of their output, or
+# take long enough to return that you’ve already typed part of the
+# next command.  Either causes bash to start its prompt in the middle
+# of a line, which confuses it.  This script sets $PROMPT_COMMAND to
+# echo a magic sequence of terminal commands that will display a red
+# “<no LF>\n” before the prompt if it would otherwise start in the
+# middle of a line.
+#
+# Copyright © 2010 Anders Kaseorg <andersk@mit.edu>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# Usage: Source this file from your ~/.bashrc.
+
+show_no_lf () {
+    tput -S <<NOLF && echo -n '<no LF>' && \
+    tput -S <<SPSP && echo -n '  ' && \
+    tput -S <<EOF
+sc
+tbc
+cr
+cuf 8
+hts
+rc
+setaf 1
+rev
+NOLF
+sgr0
+ht
+sc
+tbc
+cr
+$(for ((i=8; i<=320; i+=8)); do echo cuf 8; echo hts; done)
+rc
+SPSP
+cr
+el
+EOF
+}
+
+show_no_lf="$(show_no_lf)" && \
+PROMPT_COMMAND="echo -n \"\$show_no_lf\" >&2;$PROMPT_COMMAND"