deploy: use a real temporary directory

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

deploy

@@ -7,7 +7,6 @@ DIR_PLAYBOOKS="playbooks"
 DIR_ENVIRONMENTS="envs"
 DIR_ROLES="roles"
 DIR_GROUP_VARS="group_vars"
-DIR_TEMP=".deploy-ansible-home"
 
 FILE_VAULT_PASSWORD="vault-password"
 
@@ -57,8 +56,10 @@ if [[ ! -f "${playbook_file}" ]]; then
 fi
 
 # Create the temporary working directory
-rm -rf "${DIR_TEMP}"
-mkdir -p "${DIR_TEMP}/play"
+DIR_TEMP="$(mktemp -d -t deploy-ansible-home-XXXXXXX)"
+function cleanup () { rm -rf "$DIR_TEMP"; }
+mkdir -p "$DIR_TEMP/play"
+trap cleanup EXIT
 
 ln -s "`readlink -f "${DIR_ROLES}"`" "${DIR_TEMP}/play/roles"
 ln -s "`readlink -f "${DIR_GROUP_VARS}"`" "${DIR_TEMP}/play/group_vars"
@@ -77,6 +78,3 @@ fi
                          "${DIR_TEMP}/play/playbook.yml" \
                          ${vault_flags} \
                          || true
-
-# Remove temporary directory
-rm -rf "${DIR_TEMP}"