Read a quoted LANG and append LANG on its own line in omarchy-language

bin/omarchy-language

@@ -10,7 +10,10 @@ set -euo pipefail
 locale_conf=/etc/locale.conf
 
 if (($# == 0)); then
-  sed -n 's/^LANG=//p' "$locale_conf"
+  lang=$(sed -n 's/^LANG=//p' "$locale_conf")
+  # locale.conf may quote the value.
+  lang=${lang#[\"\']}
+  printf '%s\n' "${lang%[\"\']}"
   exit 0
 fi
 
@@ -28,6 +31,7 @@ sudo locale-gen
 if grep -q '^LANG=' "$locale_conf"; then
   sudo sed -i "s/^LANG=.*/LANG=$lang/" "$locale_conf"
 else
+  sudo sed -i '$a\' "$locale_conf"
   echo "LANG=$lang" | sudo tee -a "$locale_conf" >/dev/null
 fi
 

test/shell.d/language-test.sh

@@ -41,10 +41,21 @@ output=$(omarchy-language en)
 [[ $output == "Log back in to switch the language." ]] || fail "English reminds in English" "$output"
 pass "switching to English generates en_US and sets LANG"
 
-printf 'LC_TIME=en_DK.UTF-8\n' >"$root/etc/locale.conf"
+printf 'LC_TIME=en_DK.UTF-8' >"$root/etc/locale.conf"
 omarchy-language zh >/dev/null
-[[ $(<"$root/etc/locale.conf") == $'LC_TIME=en_DK.UTF-8\nLANG=zh_CN.UTF-8' ]] || fail "a locale.conf without LANG gains one" "$(<"$root/etc/locale.conf")"
-pass "a locale.conf without LANG gains one"
+[[ $(<"$root/etc/locale.conf") == $'LC_TIME=en_DK.UTF-8\nLANG=zh_CN.UTF-8' ]] || fail "a locale.conf without LANG or a final newline gains LANG on its own line" "$(<"$root/etc/locale.conf")"
+: >"$root/etc/locale.conf"
+omarchy-language en >/dev/null
+[[ $(<"$root/etc/locale.conf") == "LANG=en_US.UTF-8" ]] || fail "an empty locale.conf gains LANG" "$(<"$root/etc/locale.conf")"
+pass "a locale.conf without LANG gains one on its own line"
+
+printf 'LANG="zh_CN.UTF-8"\n' >"$root/etc/locale.conf"
+[[ $(omarchy-language) == "zh_CN.UTF-8" ]] || fail "a double-quoted LANG reads unquoted" "$(omarchy-language)"
+printf "LANG='en_US.UTF-8'\n" >"$root/etc/locale.conf"
+[[ $(omarchy-language) == "en_US.UTF-8" ]] || fail "a single-quoted LANG reads unquoted" "$(omarchy-language)"
+printf 'LC_TIME=en_DK.UTF-8\n' >"$root/etc/locale.conf"
+[[ -z $(LANG=de_DE.UTF-8 omarchy-language) ]] || fail "a locale.conf without LANG reads empty, not the caller's LANG"
+pass "omarchy-language reads quoted values and ignores the caller's LANG"
 
 before=$(<"$root/etc/locale.conf")
 if output=$(omarchy-language fr 2>&1); then