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Refactor grep.zsh file

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- Move grep-alias path to variable.
- Use <<< "" instead of piped echo to check grep flags.
- Remove check for --color only since it's the same release as --exclude.
This commit is contained in:
Marc Cornellà 2020-03-01 20:17:38 +01:00
parent 8d814fdff6
commit dc190d872a
1 changed files with 20 additions and 22 deletions
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42
lib/grep.zsh
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@ -1,39 +1,37 @@
# see if we already cached the grep alias in past day
_grep_alias_cache=("$ZSH_CACHE_DIR"/grep_alias.zsh(Nm-24))
if (( $#_grep_alias_cache )); then
source "$ZSH_CACHE_DIR"/grep_alias.zsh
else
# is x grep argument available?
__GREP_CACHE_FILE="$ZSH_CACHE_DIR"/grep-alias
# See if there's a cache file modified in the last day
__GREP_ALIAS_CACHES=("$__GREP_CACHE_FILE"(Nm-1))
if [[ -z "$__GREP_ALIAS_CACHES" ]]; then
grep-flags-available() {
echo | grep "$@" "" >/dev/null 2>&1
command grep "$@" "" &>/dev/null <<< ""
}
GREP_OPTIONS=""
# ignore these folders (if the necessary grep flags are available)
# Ignore these folders (if the necessary grep flags are available)
EXC_FOLDERS="{.bzr,CVS,.git,.hg,.svn,.idea,.tox}"
# Check for --exclude-dir, otherwise check for --exclude. If --exclude
# isn't available, --color won't be either (they were released at the same
# time (v2.5): http://git.savannah.gnu.org/cgit/grep.git/tree/NEWS?id=1236f007
if grep-flags-available --color=auto --exclude-dir=.cvs; then
GREP_OPTIONS+="--color=auto --exclude-dir=$EXC_FOLDERS"
GREP_OPTIONS="--color=auto --exclude-dir=$EXC_FOLDERS"
elif grep-flags-available --color=auto --exclude=.cvs; then
GREP_OPTIONS+="--color=auto --exclude=$EXC_FOLDERS"
elif grep-flags-available --color=auto; then
GREP_OPTIONS+="--color=auto"
GREP_OPTIONS="--color=auto --exclude=$EXC_FOLDERS"
fi
{
if [[ -n "$GREP_OPTIONS" ]]; then
# export grep, egrep and fgrep settings
echo alias grep="'grep $GREP_OPTIONS'"
echo alias egrep="'egrep $GREP_OPTIONS'"
echo alias fgrep="'fgrep $GREP_OPTIONS'"
echo "alias grep='grep $GREP_OPTIONS'"
echo "alias egrep='egrep $GREP_OPTIONS'"
echo "alias fgrep='fgrep $GREP_OPTIONS'"
fi
} > "$ZSH_CACHE_DIR/grep_alias.zsh"
} > "$__GREP_CACHE_FILE"
source "$ZSH_CACHE_DIR/grep_alias.zsh"
# clean up
# Clean up
unset GREP_OPTIONS EXC_FOLDERS
unfunction grep-flags-available
fi
unset _grep_alias_cache
source "$__GREP_CACHE_FILE"
unset __GREP_CACHE_FILE __GREP_ALIAS_CACHES