bash: Add aliases and prompt.

.bashrc

@@ -0,0 +1,40 @@
+# Bash initialization for interactive non-login shells and
+# for remote shells (info "(bash) Bash Startup Files").
+
+# Export 'SHELL' to child processes.  Programs such as 'screen'
+# honor it and otherwise use /bin/sh.
+export SHELL
+
+if [[ $- != *i* ]]
+then
+    # We are being invoked from a non-interactive shell.  If this
+    # is an SSH session (as in "ssh host command"), source
+    # /etc/profile so we get PATH and other essential variables.
+    [[ -n "$SSH_CLIENT" ]] && source /etc/profile
+
+    # Don't do anything else.
+    return
+fi
+
+# Source the system-wide file.
+source /etc/bashrc
+
+# Adjust the prompt depending on whether we're in 'guix environment'.
+if [ -n "$GUIX_ENVIRONMENT" ]
+then
+    # PS1='\u@\h \w [env]\$ '
+		PS1='[\u@\h \w] \D{%F %T}\n[env]\$ '
+else
+    # PS1='\u@\h \w \$ '
+		PS1='[\u@\h \w] \D{%F %T}\n\$ '
+fi
+
+mkcd(){
+	mkdir -p "$@" && cd "$1"
+}
+
+alias ls='ls -p --color=auto'
+alias ll='ls -l'
+alias la='ls -lAh'
+alias l='ls -1'
+alias grep='grep --color=auto'