Introduce the i3-sensible-{pager,editor,terminal} scripts

The former two provide fallbacks in case $PAGER or $EDITOR is not set (which
might be more common than you think, because they have to be set in
~/.xsession, not in the shell configuration!) while the latter tries to launch
a terminal emulator. The scripts are most prominently used in i3-nagbar, which
alerts the user when the configuration is broken for some reason. Also,
i3-sensible-terminal is used in the default configuration.

This commit does not rely on the shell supporting ${PAGER:-less} anymore, which
is not the case for 'fish'.

1 files changed, 14 insertions, 0 deletions

diff --git a/i3-sensible-editor b/i3-sensible-editor
new file mode 100755
index 00000000..dffe00d5
--- /dev/null
+++ b/i3-sensible-editor
@@ -0,0 +1,14 @@
+#!/bin/sh
+# This script tries to exec an editor by trying some known editors if $EDITOR is
+# not set.
+#
+# Distributions/packagers can enhance this script with a
+# distribution-specific mechanism to find the preferred pager.
+which $VISUAL >/dev/null && exec $VISUAL "$@"
+which $EDITOR >/dev/null && exec $EDITOR "$@"
+
+# Hopefully one of these is installed (no flamewars about preference please!):
+which nano >/dev/null && exec nano "$@"
+which vim >/dev/null && exec vim "$@"
+which vi >/dev/null && exec vi "$@"
+which emacs >/dev/null && exec emacs "$@"