Change backticks to the more legible $()

tests/setup

@@ -35,7 +35,7 @@ clean () {
     fi
 }
 trap clean EXIT
-d=`mktemp -d -t jqXXXXXX || true`
+d=$(mktemp -d -t jqXXXXXX || true)
 if [ -z "$d" ]; then
     echo "Your OS does not support mktemp(1) -d" 1>&2
     exit 1

tests/shtest

@@ -29,45 +29,45 @@ $VALGRIND $Q $JQ -Rne '[inputs] == ["a\u0000b", "c\u0000d", "e"]' $d/input
 ## move all of these into tests/all.test
 
 # String constant folding (addition only)
-nref=`$VALGRIND $Q $JQ -n --debug-dump-disasm '"foo"' | wc -l`
+nref=$($VALGRIND $Q $JQ -n --debug-dump-disasm '"foo"' | wc -l)
 
 # Numeric constant folding (not all ops yet)
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '1+1' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '1+1' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '1-1' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '1-1' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '2*3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '2*3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '9/3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '9/3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '9==3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '9==3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '9!=3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '9!=3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '9<=3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '9<=3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
 fi
-n=`$VALGRIND $Q $JQ -n --debug-dump-disasm '9>=3' | wc -l`
+n=$($VALGRIND $Q $JQ -n --debug-dump-disasm '9>=3' | wc -l)
 if [ $n -ne $nref ]; then
     echo "Constant expression folding for strings didn't work"
     exit 1
@@ -145,15 +145,15 @@ if which seq > /dev/null 2>&1; then
     # test very, very slow when run with valgrind, and the whole point
     # is to run it with valgrind.
     #
-    #len=`wc -c < "$JQTESTDIR/torture/input0.json"`
+    #len=$(wc -c < "$JQTESTDIR/torture/input0.json")
     if [ -z "$VALGRIND" ]; then
         start=1
-        end=`wc -c < "$JQTESTDIR/torture/input0.json"`
+        end=$(wc -c < "$JQTESTDIR/torture/input0.json")
     else
         start=120
         end=151
     fi
-    for i in `seq $start $end`; do
+    for i in $(seq $start $end); do
         dd "if=tests/torture/input0.json" bs=$i count=1 2>/dev/null |
             $VALGRIND $JQ -c . > $d/out0 2>$d/err || true
         if [ -n "$VALGRIND" ]; then
@@ -178,7 +178,7 @@ fi
 
 ## Fuzz parser
 
-## XXX With a `urandom` builtin we could move this test into tests/all.test
+## XXX With a $(urandom) builtin we could move this test into tests/all.test
 clean=false
 if dd if=/dev/urandom bs=16 count=1024 > $d/rand 2>/dev/null; then
     # Have a /dev/urandom, good
@@ -197,12 +197,12 @@ clean=true
 
 # Check handling of ~/.jq; these can't move into jq_test.c yet because
 # they depend on $HOME
-if [ "`HOME="$mods" $VALGRIND $Q $JQ -nr fg`" != foobar ]; then
+if [ "$(HOME="$mods" $VALGRIND $Q $JQ -nr fg)" != foobar ]; then
     echo "Bug #479 appears to be back" 1>&2
     exit 1
 fi
 
-if [ `HOME="$mods" $VALGRIND $Q $JQ --debug-dump-disasm -n fg | grep '^[a-z]' | wc -l` -gt 3 ]; then
+if [ $(HOME="$mods" $VALGRIND $Q $JQ --debug-dump-disasm -n fg | grep '^[a-z]' | wc -l) -gt 3 ]; then
     echo "Binding too many defs into program" 1>&2
     exit 1
 fi
@@ -239,15 +239,15 @@ elif [ $? -ne 11 ]; then
     echo "jq halt_error(11) had wrong error code" 1>&2
     exit 1
 fi
-if [ -n "`$VALGRIND $Q $JQ -n 'halt_error(1)' 2>&1`" ]; then
+if [ -n "$($VALGRIND $Q $JQ -n 'halt_error(1)' 2>&1)" ]; then
     echo "jq halt_error(1) had unexpected output" 1>&2
     exit 1
 fi
-if [ -n "`$VALGRIND $Q $JQ -n '"xyz\n"|halt_error(1)' 2>/dev/null`" ]; then
+if [ -n "$($VALGRIND $Q $JQ -n '"xyz\n"|halt_error(1)' 2>/dev/null)" ]; then
     echo "jq halt_error(1) had unexpected output on stdout" 1>&2
     exit 1
 fi
-if [ "`$VALGRIND $Q $JQ -n '"xyz\n"|halt_error(1)' 2>&1`" != xyz ]; then
+if [ "$($VALGRIND $Q $JQ -n '"xyz\n"|halt_error(1)' 2>&1)" != xyz ]; then
     echo "jq halt_error(1) had unexpected output" 1>&2
     exit 1
 fi

tests/utf8test

@@ -2,7 +2,7 @@
 
 . "${0%/*}/setup" "$@"
 
-if [ "`$VALGRIND $Q $JQ -nf $JQTESTDIR/utf8-truncate.jq`" != "true" ]; then
+if [ "$($VALGRIND $Q $JQ -nf $JQTESTDIR/utf8-truncate.jq)" != "true" ]; then
 	echo "UTF-8 byte sequences that span the jv_load_file read buffer are mangled"
 	exit 1
 fi