use `command -v` instead of `which` to determine tool availability.

It's POSIX and also considers builtins.

build.sh

@@ -25,7 +25,7 @@ echo "--     The Essentials only MicroG pack      --";
 modname="MinMicroG";
 
 for bin in cp grep ls mv rm sed zip; do
-  [ "$(which $bin)" ] || abort "No $bin found";
+  command -v "$bin" >/dev/null || abort "No $bin found";
 done;
 
 echo " ";

bump.sh

@@ -23,7 +23,7 @@ echo "--        Minimal MicroG Test Script        --";
 echo "--     The Essentials only MicroG pack      --";
 
 for bin in printf sed; do
-  [ "$(which $bin)" ] || abort "No $bin found";
+  command -v "$bin" >/dev/null || abort "No $bin found";
 done;
 
 [ "$#" = "3" ] || abort "Not enough arguments";

res/util/func-defconf.sh

@@ -80,7 +80,7 @@ microg_cleanup() {
             fi;
           done;
         fi;
-        if [ "$(which sqlite3)" ]; then
+        if command -v "sqlite3" >/dev/null; then
           find /data/system* -type f -name "accounts*db" 2>/dev/null | while read -r database; do
             log "PREPPER: deleting Google Accounts from $database";
             sqlite3 "$database" "DELETE FROM accounts WHERE type='com.google';";

res/util/func-resdl.sh

@@ -54,7 +54,7 @@ verifycerts() {
 
   [ "$stuff_repo" ] || echo "$stuff_download" | grep -qE "^[ ]*[^ ]+.apk[ ]+" || return 0;
 
-  [ "$(which jarsigner)" ] && [ "$(which openssl)" ] || {
+  command -v "jarsigner" >/dev/null && command -v "openssl" >/dev/null || {
     echo " ";
     echo " !! Not checking certificates (missing jarsigner or openssl)";
     return 0;
@@ -115,7 +115,7 @@ checkwhitelist() {
 
   echo "$stuff_download" | grep -qE "^[ ]*/system/priv-app/[^ ]+.apk[ ]+" || return 0;
 
-  [ "$(which aapt)" ] || {
+  command -v "aapt" >/dev/null || {
     echo " ";
     echo " !! Not checking privperms (missing aapt)";
     return 0;

src/META-INF/com/google/android/update-binary

@@ -102,7 +102,7 @@ $bootmode || {
 }
 
 for bin in chcon chmod chown cp cut df du echo find grep head mkdir mount ps rm sed tail touch umount unzip; do
-  [ "$(which "$bin")" ] || abort "No $bin available";
+  command -v "$bin" >/dev/null || abort "No $bin available";
 done;
 
 $bootmode && filedir="/dev/tmp/$modname" || filedir="/tmp/$modname";

test.sh

@@ -19,7 +19,7 @@ echo "--        Minimal MicroG Test Script        --";
 echo "--     The Essentials only MicroG pack      --";
 
 for bin in shellcheck; do
-  [ "$(which $bin)" ] || abort "No $bin found";
+  command -v "$bin" >/dev/null || abort "No $bin found";
 done;
 
 # These tests are only excluded in the command because they're pointless

update.sh

@@ -40,7 +40,7 @@ echo "--      The Essentials Only MicroG Pack     --";
 
 # Bin check
 for bin in chmod cp curl grep head jq mv rm sort tr unzip; do
-  [ "$(which $bin)" ] || abort "No $bin found";
+  command -v "$bin" >/dev/null || abort "No $bin found";
 done;
 
 echo " ";