Switch grep -q for >/dev/null

This makes the grep commands cross-platform compatible.

bin/ghe-host-check

@@ -31,7 +31,7 @@ set -e
 if [ $rc -ne 0 ]; then
     case $rc in
         255)
-            if echo "$output" | grep -i -q "port 22: connection refused"; then
+            if echo "$output" | grep -i "port 22: connection refused" >/dev/null; then
                 exec "$0" "$hostname:122"
             fi
 
@@ -44,7 +44,7 @@ if [ $rc -ne 0 ]; then
             echo "Error: couldn't read GitHub Enterprise fingerprint on '$host' or this isn't a GitHub appliance." 1>&2
             ;;
         1)
-            if [ "${port:-22}" -eq 22 ] && echo "$output" | grep -q "use port 122"; then
+            if [ "${port:-22}" -eq 22 ] && echo "$output" | grep "use port 122" >/dev/null; then
                 exec "$0" "$hostname:122"
             else
                 echo "$output" 1>&2

bin/ghe-restore

@@ -139,7 +139,7 @@ fi
 
 # Restoring Elasticsearch to 11.10.3x via rsync requires GNU tar
 if [ "$GHE_VERSION_MAJOR" -le 1 ] && [ "$GHE_BACKUP_STRATEGY" = "rsync" ]; then
-    if ! tar --version | grep -q GNU; then
+    if ! tar --version | grep GNU >/dev/null; then
         if ! command -v gtar >/dev/null 2>&1; then
             echo "GNU tar is required.  Aborting." >&2
             exit 1

share/github-backup-utils/ghe-backup-repositories-rsync

@@ -76,7 +76,7 @@ echo "
     while [ \$sanity -lt $GHE_GIT_COOLDOWN_PERIOD ]; do
         # note: the bracket synta[x] below is to prevent matches against the
         # grep process itself.
-        if ps axo args | grep -q -E -e '^git( -.*)? nw-repac[k]( |$)' -e '^git( -.*)? g[c]( |$)'; then
+        if ps axo args | grep -E -e '^git( -.*)? nw-repac[k]( |$)' -e '^git( -.*)? g[c]( |$)' >/dev/null; then
             sleep 1
             sanity=\$(( sanity + 1 ))
         else

share/github-backup-utils/ghe-restore-es-rsync

@@ -57,7 +57,7 @@ elif [ "$GHE_VERSION_MAJOR" -gt 1 ]; then
 else
     # Use GNU tar on BSDs.
     TAR=tar
-    if ! tar --version | grep -q GNU; then
+    if ! tar --version | grep GNU >/dev/null; then
             TAR=gtar
     fi
     cd "$GHE_DATA_DIR/$GHE_RESTORE_SNAPSHOT"

share/github-backup-utils/ghe-ssh

@@ -51,7 +51,7 @@ opts="-l $user $opts"
 
 # Bail out with error if the simple command form is used with complex commands.
 # Complex
-if echo "$*" | grep -q "[|;]" || [ $(echo "$*" | wc -l) -gt 1 ]; then
+if echo "$*" | grep "[|;]" >/dev/null || [ $(echo "$*" | wc -l) -gt 1 ]; then
     echo "fatal: ghe-ssh: Attempt to invoke complex command with simple command form." 1>&2
     echo "See ghe-ssh --help for more on correcting." 1>&2
     exit 1