.shellrc: test existing of programs before creating wrappers for them

diff --git a/.shellrc b/.shellrc
index 7b362b894343cebf856e0e86016dc912f6a80210..2b79a64297134e4e29e55d84a995a780729b3fd3 100644 (file)
--- a/.shellrc
+++ b/.shellrc
@@ -165,8 +165,7 @@ KillAll() {
 }
 
 
-# git-related
-
+if test -x /usr/bin/git >/dev/null 2>&1; then
 # chdir to a remote's directory (if the remote is on the local FS)
 cdremote() {
    cd "`git config --get remote.$1.url`"
@@ -204,6 +203,7 @@ if test -n "$BASH_VERSION"; then
 
    complete -F _git_open git-open
 fi
+fi
 
 
 include() {
@@ -308,6 +308,7 @@ mkcd() {
 }
 
 
+if which tmux >/dev/null 2>&1; then
 tmux() {
    case "$TERM" in
       rxvt)
@@ -319,6 +320,7 @@ tmux() {
       ;;
    esac
 }
+fi
 
 
 #if which pyenv >/dev/null 2>&1; then
@@ -331,5 +333,8 @@ if [ -f /usr/local/bin/virtualenvwrapper_lazy.sh ]; then
 fi
 
 
+if [ "$SHLVL" -eq 1 ] && which startx >/dev/null 2>&1; then
 X() { startx >> .Xserver.log 2>&1; cyr; }
+fi
+
 x() { exit; }