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made en print to stdout by default

This commit is contained in:
Emma Tebibyte 2024-04-18 10:10:22 -06:00
parent 5bbbd60cfc
commit 4f0788048b
Signed by: emma
GPG Key ID: 06FA419A1698C270
1 changed files with 28 additions and 43 deletions
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71
en
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@ -1,41 +1,37 @@
#!/bin/sh -e
# Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
# Copyright (c) 2023-2024 Emma Tebibyte <emma@tebibyte.media>
# SPDX-License-Identifier: FSFAP
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice and this
# notice are preserved. This file is offered as-is, without any warranty.
argv0="$0"
exec >&2 </dev/tty
if test -z "$1"; then
printf "Usage: %s file...\n" "$argv0" 1>&2
printf "Usage: %s file...\n" "$0" 1>&2
exit 64 # sysexits.h(3) EX_USAGE
fi
if ! command -v mktemp >/dev/null 2>&1
then
printf "%s: mktemp(1): Missing dependency." "$argv0"
printf "%s: mktemp(1): missing dependency" "$0"
exit 69 # sysexits.h(3) EX_UNAVAILABLE
fi
help="$(printf "Commands:\n\
/ – display lines containing a string.\n\
? – displays this help message.\n\
a – appends a line to the current buffer.\n\
c – clears the screen.\n\
d – deletes a line.\n\
e – evaluates a command in the shell environment.\n\
i – inserts a line into the buffer at position line.\n\
p – prints the current buffer.\n\
q – terminates editing.\n\
r – applies a regular expression to the current buffer.\n\
w – writes the current buffer to the file.\n\
/ – display lines containing a string\n\
? – display this help message\n\
a – append a line to the current buffer\n\
c – clear the screen\n\
d – delete a line\n\
e – evaluate a command in the shell environment\n\
i – insert a line into the buffer at position line\n\
p – print the current buffer\n\
q – terminate editing\n\
r – applie a regular expression to the current buffer\n\
x – exit the program without writing output\n\
\n\
To learn more about a command verb, type \`? verb'.\n\
en(1) Copyright (c) 2023 Emma Tebibyte\n")"
en(1) Copyright (c) 2023–2024 Emma Tebibyte\n")"
while test -n "$1"; do
content="$(cat "$1")"
@ -55,22 +51,22 @@ while test -n "$1"; do
fi
while true; do
printf ">> "
printf ">> " >/dev/tty
read -r command args
case $command in
"/")
if test -z "$args"; then
printf "%s: %s: Missing argument.\n" "$argv0" "$args"
printf "%s: %s: missing argument\n" "$0" "$args"
else
printf "%s" "$content" | nl | sed -n "/$args/p"
fi
;;
"?")
if test -z "$args"; then
printf "%s: %s\n" "$argv0" "$help"
printf "%s: %s\n" "$0" "$help"
else
printf "%s: Command-specific help not implemented.\n" "$argv0" 1>&2
printf "%s: command-specific help not implemented\n" "$0" 1>&2
continue
fi
;;
@ -87,7 +83,7 @@ while test -n "$1"; do
;;
"d")
if test -z "$args"; then
printf "%s: %s: Missing argument.\n" "$argv0" "$command" 1>&2
printf "%s: %s: Missing argument.\n" "$0" "$command" 1>&2
else
for line in $(printf "%s\n" "$args" | sed 's/,/\n/g')
do
@ -100,39 +96,28 @@ while test -n "$1"; do
eval "$args" || true
;;
"i")
printf "%s: i: Command not implemented.\n" "$argv0" 1>&2
printf "%s: i: Command not implemented.\n" "$0" 1>&2
;;
"p")
out="$(syntax_h "$content" 2>/dev/null || printf "%s\n" "$content")"
printf "%s\n" "$out" | nl -ba
printf "%s\n" "$out" | nl -ba >/dev/tty
;;
"q")
if test -n "$(printf "%s\n" "$content" | diff "$1" -)"
then
printf "%s: %s: Unsaved changes in the buffer. Quit anyway? [y/N] " \
"$argv0" \
"$1"
read -r quit
if [ "$quit" = "y" ]; then
break
else
continue
fi
else
break
fi
break
;;
"r")
content="$(printf "%s" "$content" | sed -e "$args")"
;;
"w")
printf "%s\n" "$content" > "$1"
"x")
exit
;;
*)
printf "%s: %s: No such command.\n" "$argv0" "$command"
printf "%s: %s: unrecognized command\n" "$0" "$command"
;;
esac
done
printf '%s\n' "$content"
shift
done