From e00a37895b6b56f28d9b0d3d360af500397dd39e Mon Sep 17 00:00:00 2001
From: Mihai Moldovan <ionic@ionic.de>
Date: Mon, 4 Jul 2016 21:42:28 +0200
Subject: bin/{debian,ubuntu}-codename-to-version.sh: fix various shortcomings:

  - return can only be used in functions. Switch to "exit" instead.
  - typeset -l makes the content lowercase, not the variable "local"
    (that's implied by using typeset.) Hence, drop it where
    inappropriate.
  - typeset -l is only available in BASH 4 and higher. Use it
    conditionally only.
  - Use tr to convert strings to lowercase when using a BASH version
    lower than 4.
---
 bin/debian-codename-to-version.sh | 14 +++++++++++---
 bin/ubuntu-codename-to-version.sh | 14 +++++++++++---
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/bin/debian-codename-to-version.sh b/bin/debian-codename-to-version.sh
index 8bd0384..42f497b 100755
--- a/bin/debian-codename-to-version.sh
+++ b/bin/debian-codename-to-version.sh
@@ -29,10 +29,18 @@ unset CDPATH
 # The return code is either 0, iff mapping was successful,
 # or 1 if the code name is unknown and mapping failed.
 
-typeset -l codename
+# Where supported (BASH 4 and higher), automatically
+# lower-case the codename argument.
+if [ -n "${BASH_VERSINFO[0]}" ] && [ "${BASH_VERSINFO[0]}" -gt 3 ]; then
+	typeset -l codename
+fi
 codename="${1:?"No code name provided."}"
 
-typeset -l -i ret="0"
+if [ -z "${BASH_VERSINFO[0]}" ] || [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
+	codename="$(tr '[:upper:]' '[:lower:]' <<< "${codename}")"
+fi
+
+typeset -i ret="0"
 
 case "${codename}" in
 	# The first version number is actually "fake",
@@ -79,4 +87,4 @@ case "${codename}" in
 	(*) ret="1";;
 esac
 
-return "${ret}"
+exit "${ret}"
diff --git a/bin/ubuntu-codename-to-version.sh b/bin/ubuntu-codename-to-version.sh
index 943e130..f2884cf 100755
--- a/bin/ubuntu-codename-to-version.sh
+++ b/bin/ubuntu-codename-to-version.sh
@@ -28,10 +28,18 @@ unset CDPATH
 # The return code is either 0, iff mapping was successful,
 # or 1 if the code name is unknown and mapping failed.
 
-typeset -l codename
+# Where supported (BASH 4 and higher), automatically
+# lower-case the codename argument.
+if [ -n "${BASH_VERSINFO[0]}" ] && [ "${BASH_VERSINFO[0]}" -gt 3 ]; then
+	typeset -l codename
+fi
 codename="${1:?"No code name provided."}"
 
-typeset -l -i ret="0"
+if [ -z "${BASH_VERSINFO[0]}" ] || [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
+	codename="$(tr '[:upper:]' '[:lower:]' <<< "${codename}")"
+fi
+
+typeset -i ret="0"
 
 case "${codename}" in
 	# The first version number is actually "fake",
@@ -69,4 +77,4 @@ case "${codename}" in
 	(*) ret="1";;
 esac
 
-return "${ret}"
+exit "${ret}"
-- 
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