Enhance extract function

home/.bashrc

@@ -1,21 +1,58 @@
+source $HOME/.local/bin/p.sh
+
 export EDITOR="vim"
 export PS1="\n[\[\e[37m\]\u\[\e[0m\]@\[\e[37;2m\]\h\[\e[0m\]] \[\e[1m\]\w \[\e[0;2m\]J:\[\e[0m\]\j\n\$ "
 
 extract() {
-  if [ -f $1 ]; then
-    case $1 in
-    *.tar.bz2) tar xjf $1 ;;
-    *.tar.gz) tar xzf $1 ;;
-    *.bz2) bunzip2 $1 ;;
-    *.rar) unrar e $1 ;;
-    *.gz) gunzip $1 ;;
-    *.tar) tar xf $1 ;;
-    *.tbz2) tar xjf $1 ;;
-    *.tgz) tar xzf $1 ;;
-    *.zip) unzip $1 ;;
-    *.Z) uncompress $1 ;;
-    *.7z) 7z x $1 ;;
-    *) echo "'$1' cannot be extracted via extract()" ;;
+  if [ -f "$1" ]; then
+    case "$1" in
+    *.tar.bz2)
+      command -v tar >/dev/null || p i tar
+      tar xjf "$1"
+      ;;
+    *.tar.gz)
+      command -v tar >/dev/null || p i tar
+      tar xzf "$1"
+      ;;
+    *.bz2)
+      command -v bunzip2 >/dev/null || p i bzip2
+      bunzip2 "$1"
+      ;;
+    *.rar)
+      command -v unrar >/dev/null || p i unrar
+      unrar e "$1"
+      ;;
+    *.gz)
+      command -v gunzip >/dev/null || p i gzip
+      gunzip "$1"
+      ;;
+    *.tar)
+      command -v tar >/dev/null || p i tar
+      tar xf "$1"
+      ;;
+    *.tbz2)
+      command -v tar >/dev/null || p i tar
+      tar xjf "$1"
+      ;;
+    *.tgz)
+      command -v tar >/dev/null || p i tar
+      tar xzf "$1"
+      ;;
+    *.zip)
+      command -v unzip >/dev/null || p i unzip
+      unzip "$1"
+      ;;
+    *.Z)
+      command -v uncompress >/dev/null || p i ncompress
+      uncompress "$1"
+      ;;
+    *.7z)
+      command -v 7z >/dev/null || p i p7zip
+      7z x "$1"
+      ;;
+    *)
+      echo "'$1' cannot be extracted via extract()"
+      ;;
     esac
   else
     echo "'$1' is not a valid file"
@@ -46,11 +83,15 @@ alias ta="tmux attach"
 
 set completion-ignore-case On
 
-# Use bash-completion, if available
-[[ $PS1 && -f /usr/share/bash-completion/bash_completion ]] &&
+# bash-completion
+if [ ! -f /usr/share/bash-completion/bash_completion ]; then
+  p i bash-completion
+fi
+
+if [ -f /usr/share/bash-completion/bash_completion ]; then
   . /usr/share/bash-completion/bash_completion
+fi
 
 export OFLAGS="--ozone-platform-hint=auto"
 
 export PATH=$PATH:$HOME/.local/bin
-source $HOME/.local/bin/p.sh