From 58c96704c720e3796e0d12aa3008d33adac2560f Mon Sep 17 00:00:00 2001
From: Ian Kelling <ian@iankelling.org>
Date: Sun, 7 Jul 2024 19:15:04 -0400
Subject: [PATCH] fix and improvements

---
 brc | 47 ++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 42 insertions(+), 5 deletions(-)

diff --git a/brc b/brc
index 48cb5c4..4e0a26a 100644
--- a/brc
+++ b/brc
@@ -1316,6 +1316,15 @@ ediff() {
   emacs --eval "(ediff-files \"$1\" \"$2\")"
 }
 
+# etail + grep.
+etailg() {
+  _bntmp() {
+    ngset
+    tailf /var/log/exim4/mainlog /var/log/exim4/*main /var/log/exim4/paniclog /var/log/exim4/*panic -n 200 | grp "$@"
+    ngreset
+  }
+  bn _bntmp "$@"
+}
 # mail related
 # shellcheck disable=SC2120 # we expect to pass arguments in use outside this file
 etail() {
@@ -1691,6 +1700,33 @@ gdkill() {
   pk1 emacs --daemon
 }
 
+# execute, grep & background with bn. usage:
+#
+# CMD GREP ARGS
+# CMD CMD_ARGS - GREP ARGS
+_grx() {
+  local arg
+  local -a cmd grep_args
+  cmd=("$1")
+  shift
+  for arg; do
+    if [[ $arg == "-" ]]; then
+      cmd+=("${grep_args[@]}")
+      grep_args=()
+    else
+      grep_args+=("$arg")
+    fi
+  done
+  "${cmd[@]}" | grp "${grep_args[@]}"
+}
+grx() {
+  bn _grx "$@"
+}
+
+# grep to pipe in interactive shell
+grp() {
+  gr --color=always --line-buffered "$@" || return $?
+}
 gr() {
   grep -iIP --color=auto "$@" || return $?
 }
@@ -1947,7 +1983,7 @@ jrt() { journalctl -e -n100000 -o short-full "$@"; }
 jr() { journalctl -e -n100000 "$@" ; }
 jrf() { SYSTEMD_COLORS=true bn journalctl -n1000 -f "$@" ; }
 jrfg() {
-  _bntmp() { SYSTEMD_COLORS=true journalctl -n1000 -f | gr --line-buffered "$@"; }
+  _bntmp() { SYSTEMD_COLORS=true journalctl -n1000 -f | grp "$@"; }
   bn _bntmp "$@"
 }
 jru() {
@@ -1958,7 +1994,7 @@ jrug() {
     local unit
     unit="$1"
     shift
-    SYSTEMD_COLORS=true journalctl -n1000 -f -u "$unit" | gr --line-buffered "$@"
+    SYSTEMD_COLORS=true journalctl -n1000 -f -u "$unit" | grp "$@"
   }
   bn _bntmp "$@"
 }
@@ -2360,7 +2396,7 @@ weoff() {
 # The name bn is not special.
 #
 # Note: if you want to tail -f | grep, wrap it in a function
-# first, and use grep --line-buffered (because we are piping to a pipe).
+# first, and use grep --line-buffered --color=always (because we are piping to a pipe).
 #
 # Note: colorization will need to be turned on since it captures
 # output to a pipe, eg: SYSTEMD_COLORS=true bn journalctl -f
@@ -2369,7 +2405,8 @@ _bn() {
   local line lwlc i
   "$@" |& while read -r line; do
             # lwlc = line wrapped line count.
-            lwlc=$(( ${#line} / COLUMNS + 1 ))
+            # https://stackoverflow.com/questions/17998978/removing-colors-from-output
+            lwlc=$(( $(printf %s "$line" | sed -r "s/\x1B\[([0-9]{1,3}(;[0-9]{1,2};?)?)?[mGK]//g" | wc -c ||:) / COLUMNS + 1 ))
             # from man terminfo
             # tput sc = \e7 = save cursor
             # tput rc = \e8 = restore cursor
@@ -2968,7 +3005,7 @@ slr() {
 # ssh with multiplexing.
 ssm() {
   sl -oControlPath=/tmp/ssh_mux_%u_%h_%p_%r "$@"
-  }
+}
 # ssh solo, without multiplexing. # currently the default, but I might switch back.
 sss() {
   ssh -oControlPath=none "$@"
-- 
2.30.2