Switch to POSIX sh for scripts

- GNU `bash` may not be installed or installed outside of /bin
- *.sh only use `==` from Bash, so /bin/sh is enough

externals/tz/CMakeLists.txt

@@ -28,7 +28,7 @@ if (NOT EXISTS "${TZ_DIR}" OR NOT EXISTS "${TZIF_LIST_FILE}")
 
     execute_process(
         COMMAND
-            /bin/bash "${CMAKE_CURRENT_SOURCE_DIR}/find_tzif.sh" "${TZ_ZONEINFO_DIR}" "${TZIF_LIST_FILE}"
+            sh "${CMAKE_CURRENT_SOURCE_DIR}/find_tzif.sh" "${TZ_ZONEINFO_DIR}" "${TZIF_LIST_FILE}"
         COMMAND_ERROR_IS_FATAL ANY
     )
 endif()

externals/tz/find_tzif.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#/bin/sh
 set -e
 directory=$1
 tzif_list=$2
@@ -7,7 +7,7 @@ truncate -s 0 $tzif_list
 
 for i in `find $directory -type f`; do
     header=`head -c 4 $i`
-    if [ "$header" == "TZif" ]; then
+    if [ "$header" = "TZif" ]; then
         echo "$i" >> $tzif_list
     fi
 done

src/tzdb/CMakeLists.txt

@@ -50,7 +50,7 @@ add_custom_command(
     OUTPUT
         ${BINARY_LIST_TXT}
     COMMAND
-        bash ${CMAKE_CURRENT_SOURCE_DIR}/generate_binary_list_txt.sh ${BINARY_LIST_TXT}
+        sh ${CMAKE_CURRENT_SOURCE_DIR}/generate_binary_list_txt.sh ${BINARY_LIST_TXT}
     WORKING_DIRECTORY
         ${NX_ZONEINFO_DIR})
 

src/tzdb/generate_binary_list_txt.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 BINARY_LIST_TXT="$1"
 
 # Fill text file with zone names
@@ -8,7 +8,7 @@ get_files_nx() {
     find $target -maxdepth 1 -type f -not -regex '.*Factory' | sort
     local DIRS=`find $target -maxdepth 1 -type d | sort`
     for i in $DIRS; do
-        if [ "`readlink -e $i`" == "`readlink -e $target`" ]; then
+        if [ "`readlink -e $i`" = "`readlink -e $target`" ]; then
             continue
         fi
         get_files_nx $i