chore: use more portable grep

replace newer quiet `grep` with more portable syntax for vintage `grep`
implementations:
`grep -q foo` → `grep foo >/dev/null 2>&1`

Signed-off-by: Lucas Larson <[email protected]>

custom/aliases.zsh

@@ -1294,7 +1294,7 @@ hash_abbreviate() {
   done
   shift "$((OPTIND - 1))"
   for hash in "$@"; do
-    if printf -- '%s' "${hash-}" | command grep -E -q -w -e '^[[:xdigit:]]{4,40}$'; then
+    if printf -- '%s' "${hash-}" | command grep -E -w -e '^[[:xdigit:]]{4,40}$' >/dev/null 2>&1; then
       printf -- '%s\n' "${hash-}" | command cut -c 1-"${length:-"$(command git config --get core.abbrev 2>/dev/null || printf -- '7')"}"
       # prevent copying trailing newline with `tr` and
       # hide clipboard errors because `pbcopy` is not common

setup

@@ -106,7 +106,7 @@ command -v -- less >/dev/null 2>&1 || {
 # https://wiki.alpinelinux.org/w/index.php?oldid=18038&title=Alpine_newbie_apk_packages#coreutils_libc_and_utmps_in_alpine
 install coreutils
 { command -p -- test -x '/usr/bin/coreutils' &&
-  command -p -- find --version >/dev/null 2>&1 | command -p -- grep -q -e 'findutils'; } || {
+  command -p -- find --version >/dev/null 2>&1 | command -p -- grep -e 'findutils' >/dev/null 2>&1; } || {
   { set +o xtrace; } 2>/dev/null
   command -p -- printf -- 'installing Linux utilities...\n' >&2
   set -o xtrace
@@ -291,7 +291,7 @@ command -p -- find -- . -type d -links 2 \
 # if zsh is available, then replace bash, ash, and sh with zsh in `/etc/passwd`
 command -p -- test -w '/etc/passwd' &&
   command -v -- zsh >/dev/null 2>&1 &&
-  command -p -- grep -E -e '/bin/b?a?sh' '/etc/passwd' 2>&1 &&
+  command -p -- grep -E -e '/bin/b?a?sh' '/etc/passwd' >/dev/null 2>&1 &&
   command -p -- cp -- '/etc/passwd' '/etc/passwd-'"${now-}" &&
   command -p -- sed -e 's|/bin/b\{0,1\}a\{0,1\}sh$|'"$(command -v -- zsh)"'|' '/etc/passwd-'"${now-}" >'/etc/passwd'