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ohmyzsh/lib/grep.zsh

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Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
__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))
lib: use grep-alias cache only if ZSH_CACHE_DIR is writable Fixes #8693
2020-03-02 11:35:58 +00:00
if [[ -n "$__GREP_ALIAS_CACHES" ]]; then
source "$__GREP_CACHE_FILE"
else
Fast algorithm to determine grep alias flags This version tries whether grep supports all the flags together and progressively checks older flags if the grep test fails. This means only one grep call if all flags are supported, and one additional call for every flag that's not supported, up to a maximum of 3 calls.
2020-03-01 13:02:06 +00:00
grep-flags-available() {
Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
command grep "$@" "" &>/dev/null <<< ""
Performance enhancement for lib/grep - Use $ZSH_CACHE_DIR to store the grep alias with all the right features - Expire the cache after 24 hours - See issue #8444
2019-11-30 18:49:23 +00:00
}
avoid VCS folders
2012-06-14 05:06:36 +00:00
Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
# Ignore these folders (if the necessary grep flags are available)
Performance enhancement for lib/grep - Use $ZSH_CACHE_DIR to store the grep alias with all the right features - Expire the cache after 24 hours - See issue #8444
2019-11-30 18:49:23 +00:00
EXC_FOLDERS="{.bzr,CVS,.git,.hg,.svn,.idea,.tox}"
Extract VCS folders definition to avoid repetition
2014-12-13 18:13:27 +00:00
Refactor grep.zsh file - Move grep-alias path to variable. - Use <<< "" instead of piped echo to check grep flags. - Remove check for --color only since it's the same release as --exclude.
2020-03-01 19:17:38 +00:00
# Check for --exclude-dir, otherwise check for --exclude. If --exclude
# isn't available, --color won't be either (they were released at the same
lib: use grep-alias cache only if ZSH_CACHE_DIR is writable Fixes #8693
2020-03-02 11:35:58 +00:00
# time (v2.5): https://git.savannah.gnu.org/cgit/grep.git/tree/NEWS?id=1236f007
Fast algorithm to determine grep alias flags This version tries whether grep supports all the flags together and progressively checks older flags if the grep test fails. This means only one grep call if all flags are supported, and one additional call for every flag that's not supported, up to a maximum of 3 calls.
2020-03-01 13:02:06 +00:00
if grep-flags-available --color=auto --exclude-dir=.cvs; then
Refactor grep.zsh file - Move grep-alias path to variable. - Use <<< "" instead of piped echo to check grep flags. - Remove check for --color only since it's the same release as --exclude.
2020-03-01 19:17:38 +00:00
GREP_OPTIONS="--color=auto --exclude-dir=$EXC_FOLDERS"
Fast algorithm to determine grep alias flags This version tries whether grep supports all the flags together and progressively checks older flags if the grep test fails. This means only one grep call if all flags are supported, and one additional call for every flag that's not supported, up to a maximum of 3 calls.
2020-03-01 13:02:06 +00:00
elif grep-flags-available --color=auto --exclude=.cvs; then
Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
GREP_OPTIONS="--color=auto --exclude=$EXC_FOLDERS"
Performance enhancement for lib/grep - Use $ZSH_CACHE_DIR to store the grep alias with all the right features - Expire the cache after 24 hours - See issue #8444
2019-11-30 18:49:23 +00:00
fi
set exclude-dir or exclude grep flags only if available
2014-03-24 07:17:19 +00:00
lib: use grep-alias cache only if ZSH_CACHE_DIR is writable Fixes #8693
2020-03-02 11:35:58 +00:00
if [[ -n "$GREP_OPTIONS" ]]; then
# export grep, egrep and fgrep settings
alias grep="grep $GREP_OPTIONS"
alias egrep="egrep $GREP_OPTIONS"
alias fgrep="fgrep $GREP_OPTIONS"
# write to cache file if cache directory is writable
if [[ -w "$ZSH_CACHE_DIR" ]]; then
alias -L grep egrep fgrep >| "$__GREP_CACHE_FILE"
Fast algorithm to determine grep alias flags This version tries whether grep supports all the flags together and progressively checks older flags if the grep test fails. This means only one grep call if all flags are supported, and one additional call for every flag that's not supported, up to a maximum of 3 calls.
2020-03-01 13:02:06 +00:00
fi
lib: use grep-alias cache only if ZSH_CACHE_DIR is writable Fixes #8693
2020-03-02 11:35:58 +00:00
fi
Tidy up the grep.zsh library
2014-12-13 18:36:57 +00:00
Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
# Clean up
Performance enhancement for lib/grep - Use $ZSH_CACHE_DIR to store the grep alias with all the right features - Expire the cache after 24 hours - See issue #8444
2019-11-30 18:49:23 +00:00
unset GREP_OPTIONS EXC_FOLDERS
Fast algorithm to determine grep alias flags This version tries whether grep supports all the flags together and progressively checks older flags if the grep test fails. This means only one grep call if all flags are supported, and one additional call for every flag that's not supported, up to a maximum of 3 calls.
2020-03-01 13:02:06 +00:00
unfunction grep-flags-available
Performance enhancement for lib/grep - Use $ZSH_CACHE_DIR to store the grep alias with all the right features - Expire the cache after 24 hours - See issue #8444
2019-11-30 18:49:23 +00:00
fi
Refactor grep.zsh file - 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.
2020-03-01 19:17:38 +00:00
unset __GREP_CACHE_FILE __GREP_ALIAS_CACHES
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