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42 lines
1.4 KiB
Bash
42 lines
1.4 KiB
Bash
__GREP_CACHE_FILE="$ZSH_CACHE_DIR"/grep-alias
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# See if there's a cache file modified in the last day
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__GREP_ALIAS_CACHES=("$__GREP_CACHE_FILE"(Nm-1))
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if [[ -n "$__GREP_ALIAS_CACHES" ]]; then
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source "$__GREP_CACHE_FILE"
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else
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grep-flags-available() {
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command grep "$@" "" &>/dev/null <<< ""
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}
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# Ignore these folders (if the necessary grep flags are available)
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EXC_FOLDERS="{.bzr,CVS,.git,.hg,.svn,.idea,.tox}"
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# Check for --exclude-dir, otherwise check for --exclude. If --exclude
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# isn't available, --color won't be either (they were released at the same
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# time (v2.5): https://git.savannah.gnu.org/cgit/grep.git/tree/NEWS?id=1236f007
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if grep-flags-available --color=auto --exclude-dir=.cvs; then
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GREP_OPTIONS="--color=auto --exclude-dir=$EXC_FOLDERS"
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elif grep-flags-available --color=auto --exclude=.cvs; then
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GREP_OPTIONS="--color=auto --exclude=$EXC_FOLDERS"
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fi
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if [[ -n "$GREP_OPTIONS" ]]; then
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# export grep, egrep and fgrep settings
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alias grep="grep $GREP_OPTIONS"
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alias egrep="grep -E $GREP_OPTIONS"
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alias fgrep="grep -F $GREP_OPTIONS"
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# write to cache file if cache directory is writable
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if [[ -w "$ZSH_CACHE_DIR" ]]; then
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alias -L grep egrep fgrep >| "$__GREP_CACHE_FILE"
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fi
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fi
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# Clean up
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unset GREP_OPTIONS EXC_FOLDERS
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unfunction grep-flags-available
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fi
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unset __GREP_CACHE_FILE __GREP_ALIAS_CACHES
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