Apply Cedilla (çÇ) when using dead-key ' + c

fix-cedilla.sh

#!/usr/bin/env bash

set -e #Stop on first errors

# Setting vars up
COMPOSE_FILE='/usr/share/X11/locale/en_US.UTF-8/Compose'
GTK2_FILE='/usr/lib/gtk-2.0/2.10.0/immodules.cache'
GTK3_FILE='/usr/lib/gtk-3.0/3.0.0/immodules.cache'
ENV_FILE='/etc/environment'

# Backing up files
sudo cp ${COMPOSE_FILE} ${COMPOSE_FILE}.bak
sudo cp ${GTK2_FILE} ${GTK2_FILE}.bak
sudo cp ${GTK3_FILE} ${GTK3_FILE}.bak

# Fixing cedilla in Compose
sudo sed --in-place -e 's/ć/ç/g' ${COMPOSE_FILE}
sudo sed --in-place -e 's/Ć/Ç/g' ${COMPOSE_FILE}

# Fixing cedilla in GTK files
GTK_FILE_SEARCH_FOR='^"cedilla".*:en'
GTK_FILE_SED_EXP='s/^\(\"cedilla\".*:wa\)/\1:en/g'

grep -q ${GTK_FILE_SEARCH_FOR} ${GTK2_FILE}
[ $? -eq 1 ] && sudo sed --in-place -e ${GTK_FILE_SED_EXP} ${GTK2_FILE}
grep -q ${GTK_FILE_SEARCH_FOR} ${GTK3_FILE}
[ $? -eq 1 ] && sudo sed --in-place -e ${GTK_FILE_SED_EXP} ${GTK3_FILE}

# Fixing cedilla in environment file
ENV_FILE_GTK_LINE='GTK_IM_MODULE=cedilla'
ENV_FILE_QT_LINE='QT_IM_MODULE=cedilla'
ENV_FILE_X_LINE='XCOMPOSEFILE=/usr/share/X11/locale/pt_BR.UTF-8/Compose'

grep -q ${ENV_FILE_GTK_LINE} ${ENV_FILE}
[ $? -eq 1 ] && echo ${ENV_FILE_GTK_LINE} | sudo tee -a ${ENV_FILE} > /dev/null
grep -q ${ENV_FILE_QT_LINE} ${ENV_FILE}
[ $? -eq 1 ] && echo ${ENV_FILE_QT_LINE} | sudo tee -a ${ENV_FILE} > /dev/null
grep -q ${ENV_FILE_X_LINE} ${ENV_FILE}
[ $? -eq 1 ] && echo ${ENV_FILE_X_LINE} | sudo tee -a ${ENV_FILE} > /dev/null