Bash/Mgrep
From Attie's Wiki
(Difference between revisions)
m |
m |
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| Line 30: | Line 30: | ||
done | done | ||
fi | fi | ||
| + | CMD="find \"${DIRECTORY}\" ${FILES}" | ||
if [ -t 1 ]; then | if [ -t 1 ]; then | ||
PIPE=/tmp/$$.mgrep | PIPE=/tmp/$$.mgrep | ||
| − | trap "rm -f ${PIPE}" EXIT | + | #trap "exec 1>&-; sleep 0.1; rm -f ${PIPE}" EXIT |
mknod ${PIPE} p | mknod ${PIPE} p | ||
less -FKnRX < ${PIPE} & | less -FKnRX < ${PIPE} & | ||
| − | exec | + | exec 3>&1 |
exec 1>${PIPE} | exec 1>${PIPE} | ||
GREP_OPTIONS="--color=always ${GREP_OPTIONS}" | GREP_OPTIONS="--color=always ${GREP_OPTIONS}" | ||
| + | else | ||
| + | PIPE="" | ||
fi | fi | ||
| − | |||
eval ${CMD} | \ | eval ${CMD} | \ | ||
while read -r f; do | while read -r f; do | ||
grep -niH -E ${GREP_OPTIONS} "${EXPRESSION}" "${f}" | grep -niH -E ${GREP_OPTIONS} "${EXPRESSION}" "${f}" | ||
done | done | ||
| + | |||
| + | if [ "${PIPE}" != "" ]; then | ||
| + | exec 1>&3 | ||
| + | exec 3>&- | ||
| + | wait | ||
| + | rm -f ${PIPE} | ||
| + | fi | ||
</source> | </source> | ||
Revision as of 15:15, 15 October 2012
This is a useful tool that extends grep.
- Expression input is at the front, allowing quick & easy editing
- Recursively locates all files named (e.g:
*.c) - Files checked defaults to '
*.c' and '*.h', but can be easily changed - Multiple filenames / masks may be specified
- Uses
grep's extended regex mode - Output shows file and line number, and is highlighted
- If the output flows over the screen,
lessallows you to review the results - If the output doesnt flow over the screen,
lessquits immediately - Automatically detects if the output is to a terminal or pipe, utilizing
lessand highlighting for the former
#!/bin/bash if [ $# -lt 2 ]; then echo "usage:" echo " $0 <expression> <directory> [filename..]" exit 1 fi EXPRESSION="$1"; shift DIRECTORY="$1"; shift if [ $# -lt 1 ]; then FILES="-name '*.c' -or -name '*.h'" else FILES="-name '$1'"; shift while [ $# -ne 0 ]; do FILES="${FILES} -or -name '$1'"; shift done fi CMD="find \"${DIRECTORY}\" ${FILES}" if [ -t 1 ]; then PIPE=/tmp/$$.mgrep #trap "exec 1>&-; sleep 0.1; rm -f ${PIPE}" EXIT mknod ${PIPE} p less -FKnRX < ${PIPE} & exec 3>&1 exec 1>${PIPE} GREP_OPTIONS="--color=always ${GREP_OPTIONS}" else PIPE="" fi eval ${CMD} | \ while read -r f; do grep -niH -E ${GREP_OPTIONS} "${EXPRESSION}" "${f}" done if [ "${PIPE}" != "" ]; then exec 1>&3 exec 3>&- wait rm -f ${PIPE} fi
