Set the custom bin path within a dedicated script

The custom bin path was set in multiple places. Each time, the line
was identical and supposed the use of a /bin/sh emulation with a
common extension. To reduce duplicated code and support other
platforms, the custom bin path is now set in a dedicated script that
can be source'd.

.bashrc

@@ -14,7 +14,9 @@ export PAGER='less'
 export USER_NICKNAME="Rodolphe Breard"
 export DEBEMAIL="packages+deb@what.tf"
 export DEBFULLNAME="$USER_NICKNAME"
-[[ ":$PATH:" == *":$HOME/bin:"* ]] || export PATH="$HOME/bin:$PATH"
+
+# Path
+[ -f ~/.setpath.sh ] && . ~/.setpath.sh
 
 # Colors
 [ "$CLICOLOR" -ne 0 ] && hash dircolors 2>/dev/null && eval $(dircolors -b)

.setpath.sh

@@ -0,0 +1,4 @@
+BIN_PATH="$HOME/bin"
+found=$(echo $PATH | tr ':' '\n' | grep -w "$BIN_PATH")
+[ ! "$found" ] && export PATH="$BIN_PATH:$PATH"
+true

.xinitrc

@@ -1,7 +1,7 @@
 [ -f ~/.xprofile ] && . ~/.xprofile
+[ -f ~/.setpath.sh ] && . ~/.setpath.sh
 
 DEFAULT_SESSION=qtile
-[[ ":$PATH:" == *":$HOME/bin:"* ]] || export PATH="$HOME/bin:$PATH"
 
 case "$1" in
     awesome)

.xprofile

@@ -1,5 +1,6 @@
 [ -f /etc/xprofile ] && . /etc/xprofile
 [ -f ~/.Xresources ] && xrdb -merge ~/.Xresources
+[ -f ~/.setpath.sh ] && . ~/.setpath.sh
 
 setxkbmap -option compose:menu
 setxkbmap -option compose:rwin
@@ -7,5 +8,3 @@ setxkbmap -option compose:rwin
 hash xcompmgr 2>/dev/null && xcompmgr &
 hash xscreensaver 2>/dev/null && xscreensaver -no-splash &
 hash gpg-agent 2>/dev/null && eval $(gpg-agent --daemon --enable-ssh-support)
-
-[[ ":$PATH:" == *":$HOME/bin:"* ]] || export PATH="$HOME/bin:$PATH"

.zshrc

@@ -11,7 +11,9 @@ export PAGER='less'
 export USER_NICKNAME="Rodolphe Breard"
 export DEBEMAIL="packages+deb@what.tf"
 export DEBFULLNAME="$USER_NICKNAME"
-[[ ":$PATH:" == *":$HOME/bin:"* ]] || export PATH="$HOME/bin:$PATH"
+
+# Path
+[ -f ~/.setpath.sh ] && . ~/.setpath.sh
 
 # Colors
 [ "$CLICOLOR" -ne 0 ] && hash dircolors 2>/dev/null && eval $(dircolors -b)