Overhaul the installation and detection mechanisms

startup_hooks/install.sh

@@ -3,47 +3,73 @@
 # Yeah, my CSHENV Install script is written in Bourne shell.  This is because
 # CSH isn't a great scripting language, but it is a nice interactive shell.
 
-export REALPATH=`realpath $0`
-export INSTALLER_LOCATION=`dirname ${REALPATH}`
-export CSHENV_LOCATION=`dirname ${INSTALLER_LOCATION}`
-export RELATIVE_CSHENV_LOCATION=`realpath --relative-to=${HOME} ${CSHENV_LOCATION}`
+export HOMEPATH="$(realpath ~)"
+export REALPATH=$(realpath ${0})
+export INSTALLER_LOCATION_REAL=$(dirname ${REALPATH})
+export INSTALLER_LOCATION=$(echo ${INSTALLER_LOCATION_REAL} | sed -e 's,'"${HOMEPATH}"',~,')
+export CSHENV_LOCATION_REAL=$(dirname ${INSTALLER_LOCATION_REAL})
+export CSHENV_LOCATION=$(echo ${CSHENV_LOCATION_REAL} | sed -e 's,'"${HOMEPATH}"',~,')
+export RELATIVE_CSHENV_LOCATION=$(echo ${CSHENV_LOCATION} | sed -e 's,~/,,')
+
+export TMP_BASE=$(realpath ~/.cshenv/installer-backup/)
+mkdir -p ${TMP_BASE}
+#mkdir -p ${TMP_BASE}
+export __TMP=$(mktemp -dp ${TMP_BASE})
+
+backup_config_file()
+{
+	__file="${1}"
+	mkdir -p ${__TMP}/ssh
+
+	echo "Checking for ${__file}"
+	if [ -e ${__file} ]
+	then
+		case ${__file} in
+			*ssh/config)
+				echo "Backing up ${__file} to ${__TMP}/ssh"
+				mv ${__file} ${__TMP}/ssh/$(basename ${__file} | sed -e's/\.//')
+			;;
+			*)
+				echo "Backing up ${__file} to ${__TMP}"
+				mv ${__file} ${__TMP}/$(basename ${__file} | sed -e's/\.//')
+			;;
+		esac
+	else
+		echo "${__file} does not exist, not backing up anything."
+	fi
+}
+
+install_shell_file()
+{
+	__file="${1}"
+
+	backup_config_file ${1}
+
+	echo "Installing ${1}"
+	echo "source ${CSHENV_LOCATION}/startup_hooks/$(basename ${1} | sed -e's/\.//') "'!#:1' > ${1}
+}
 
 if [ -v CSHENV_DEBUG_INSTALLER ]
 then
+	echo HOMEPATH: $HOMEPATH
+	echo REALPATH: $REALPATH
+	echo TMP_BASE: $TMP_BASE
+	echo __TMP: $__TMP
+	echo INSTALLER_LOCATION_REAL: $INSTALLER_LOCATION_REAL
+	echo INSTALLER_LOCATION: $INSTALLER_LOCATION
+	echo CSHENV_LOCATION: $CSHENV_LOCATION
+	echo RELATIVE_CSHENV_LOCATION: $RELATIVE_CSHENV_LOCATION
 	echo $CSHENV_LOCATION
 	echo $RELATIVE_CSHENV_LOCATION
 	exit
 fi
 
-echo "Checking for ~/.login"
-if [ ! -e ~/.login ]
-then
-    echo "Installing ~/.login"
-    echo "setenv CSHENV_DIR ${CSHENV_LOCATION}" >> ~/.login
-    echo 'source ${CSHENV_DIR}/startup_hooks/login' >> ~/.login
-fi
+install_shell_file ~/.login
 
-echo "Checking for ~/.tcshrc"
-if [ ! -e ~/.tcshrc ]
-then
-    echo "Installing ~/.tcshrc"
-    echo "setenv CSHENV_DIR ${CSHENV_LOCATION}" >> ~/.tcshrc
-    echo "setenv CSHENV_HIDE_SHELL_LEVEL_AT_ONE" >> ~/.tcshrc
-    echo 'source ${CSHENV_DIR}/startup_hooks/tcshrc' >> ~/.tcshrc
-fi
+install_shell_file ~/.tcshrc
 
-echo "Checking for vim setup"
-if [ -e ~/.vimrc ]
-then
-    echo "Relocating vimrc"
-    mv ~/.vimrc ~/.vim/vimrc.old
-fi
-
-if [ -e ~/.vim ]
-then
-    echo "Relocating vim setup"
-    mv ~/.vim ~/.vim.old
-fi
+backup_config_file ~/.vimrc
+backup_config_file ~/.vim
 
 echo "Installing vim setup"
 pushd ~ >& /dev/null
@@ -51,11 +77,7 @@ ln -s `echo ${RELATIVE_CSHENV_LOCATION}`/vim .vim
 ln -s .vim/vimrc .vimrc
 popd >& /dev/null
 
-if [ -e ~/.gitconfig ]
-then
-    echo "Relocating git setup"
-    mv ~/.gitconfig ~/.gitconfig-old
-fi
+backup_config_file ~/.gitconfig
 
 echo "Installing git configuration"
 
@@ -73,6 +95,10 @@ echo "" >> ~/.gitconfig
 echo "[commit]" >> ~/.gitconfig
 echo "  gpgSign = true" >> ~/.gitconfig
 
-echo "Do not forget to add the following lines at the top and bottom of your ssh config:"
-echo "Match all\n     Include ${CSHENV_LOCATION}/ssh/config"
-echo "Match all\n     Include ${CSHENV_LOCATION}/ssh/config"
+backup_config_file ~/.ssh/config
+
+echo "Match all" >> ~/.ssh/config
+echo "     Include ${CSHENV_LOCATION}/ssh/prologue" >> ~/.ssh/config
+
+echo "Match all" >> ~/.ssh/config
+echo "     Include ${CSHENV_LOCATION}/ssh/epilogue" >> ~/.ssh/config