From 0096540c056a5624f1c57c9e081504ae2d83dc5e Mon Sep 17 00:00:00 2001
From: Oleg Broytman <phd@phdru.name>
Date: Tue, 19 May 2015 21:56:28 +0300
Subject: [PATCH] .shellrc: test if completion already exists

---
 .shellrc | 34 +++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/.shellrc b/.shellrc
index 970360f..38c547e 100644
--- a/.shellrc
+++ b/.shellrc
@@ -33,19 +33,35 @@ case "$SHELL" in
       fi
    fi
 
-   if [ -z "$BASH_COMPLETION_COMPAT_DIR" ]; then
-      complete -A command -o default man
+   has_completion() { return 0; }
+   if [ "$SHELL" = /bin/bash ]; then
+      if [ -d /etc/bash_completion.d -o -d /usr/share/bash-completion/completions ]; then
+         has_completion() { [ -r /etc/bash_completion.d/$1 -o -r /usr/share/bash-completion/completions/$1 ]; }
+      fi
+   elif [ "$SHELL" = /usr/local/bin/bash ]; then
+      if [ -d /usr/local/etc/bash_completion.d ]; then
+         has_completion() { [ -r /usr/local/etc/bash_completion.d/$1 ]; }
+      fi
    fi
 
-   complete -A command -o default builtin cgmem_nice command dbus-launch exec \
-      killall nice nohup pidof pidOf KillAll pgrep pkill psg pswg su sudo time \
-      whence whereis which xargs
-   complete -A hostname dig host nslookup nc netcat nmap p ping ping6 socat \
+   for cmd in builtin cgmem_nice command dbus-launch exec \
+      killall man nice nohup pidof pidOf KillAll pgrep pkill psg pswg su sudo \
+      time whence whereis which xargs; do
+         ! has_completion $cmd && complete -A command -o default $cmd
+   done
+
+   for cmd in dig host nslookup nc netcat nmap p ping ping6 socat \
       telnet t tt \
       tcptraceroute tcptraceroute6 tracert tracert6 traceroute traceroute6 \
-      whois wget wget-m wget-wrapper ww
-   complete -A hostname -o default distribute ftp lftp r rsync \
-      s scp ssh smbclient tcpdump tshark wireshark
+      whois wget wget-m wget-wrapper ww; do
+         ! has_completion $cmd && complete -A hostname $cmd
+   done
+
+   for cmd in distribute ftp lftp r rsync \
+      s scp ssh smbclient tcpdump tshark wireshark; do
+         ! has_completion $cmd && complete -A hostname -o default $cmd;
+   done
+
    complete -A job bg fg j jobs wait
    complete -A variable unset
 
-- 
2.39.2