fish: functions: Check return result of fzf selection

fish/.config/fish/functions/cdG.fish

@@ -1,4 +1,6 @@
 function cdG --description 'Select a coredump to run coredumpctl gdb'
     coredumpctl list --reverse | awk -F" " '$9 == "present"' | fzf | read -l result
+    if test -n "$result"
         coredumpctl gdb (echo $result | awk -F" " '{print $5}')
+    end
 end

fish/.config/fish/functions/cdi.fish

@@ -1,4 +1,6 @@
 function cdi --description 'Select a coredump to run coredumpctl info'
     coredumpctl list --reverse | awk -F" " '$9 == "present"' | fzf | read -l result
+    if test -n "$result"
         coredumpctl info (echo $result | awk -F" " '{print $5}')
+    end
 end

fish/.config/fish/functions/pfr.fish

@@ -1,4 +1,6 @@
 function pfr --description 'Select a process to record performance data in given file name'
     set proc (ps -ef | fzf | awk '{print $2}')
+    if test -n "$proc"
         perf record -F 99 -o $argv -p $proc
+    end
 end

fish/.config/fish/functions/pft.fish

@@ -1,4 +1,6 @@
 function pft --description 'Select a process to run perf top'
     set proc (ps -ef | fzf | awk '{print $2}')
+    if test -n "$proc"
         perf top -p $proc
+    end
 end

fish/.config/fish/functions/pk.fish

@@ -1,4 +1,6 @@
 function pk --description 'Fuzzy find a process to kill'
     set proc (ps -ef | fzf | awk '{print $2}')
+    if test -n "$proc"
         kill -SIGKILL $proc
+    end
 end

fish/.config/fish/functions/psmem.fish

@@ -1,4 +1,6 @@
 function psmem --description 'Show memory usage of a process'
     set proc (ps -ef | fzf | awk '{print $2}')
+    if test -n "$proc"
         ps_mem -p $proc
+    end
 end

fish/.config/fish/functions/pst.fish

@@ -1,4 +1,6 @@
 function pst --description 'Show process tree of a process'
     set proc (ps -ef | fzf | awk '{print $2}' | head -1)
+    if test -n "$proc"
         pstree -H $proc $proc
+    end
 end

fish/.config/fish/functions/rfc.fish

@@ -1,6 +1,8 @@
 function rfc --description 'Search for string in RFC documents and open'
     if test -e ~/rfc
         rg --files-with-matches $argv ~/rfc | fzf --preview='less {}' | read -l result
+        if test -n "$result"
             nvim -R $result
         end
+    end
 end

fish/.config/fish/functions/ta.fish

@@ -1,4 +1,6 @@
 function ta --description 'Attaches to a selected session'
     set session (tmux list-sessions | fzf | awk -F':' '{print $1}')
+    if test -n "$session"
         tmux attach -t $session
+    end
 end

fish/.config/fish/functions/topf.fish

@@ -1,4 +1,6 @@
 function topf --description 'Select a process to run top'
     set proc (ps -ef | fzf | awk '{print $2}')
+    if test -n "$proc"
         top -H -p $proc
+    end
 end