Bash/Mgrep
From Attie's Wiki
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This is a useful tool that extends grep. | This is a useful tool that extends grep. | ||
* Expression input is at the front, allowing quick & easy editing | * Expression input is at the front, allowing quick & easy editing | ||
| − | * | + | * Search directory defaults to <code>.</code>, but can be easily modified |
| − | * Files checked defaults to '<code>*.c</code>' and '<code>*.h</code>', but can be easily changed | + | * Files checked defaults to '<code>*.c</code>', '<code>*.cpp</code>' and '<code>*.h</code>', but can be easily changed |
| − | * Multiple filenames / masks may be specified | + | * Recursively locates all files matching given names (e.g: <code>*.c</code>) |
| + | * Multiple filenames / masks / patterns may be specified | ||
* Uses <code>grep</code>'s extended regex mode | * Uses <code>grep</code>'s extended regex mode | ||
* Output shows file and line number, and is highlighted | * Output shows file and line number, and is highlighted | ||
| Line 9: | Line 10: | ||
* If the output ''doesnt'' flow over the screen, <code>less</code> quits immediately | * If the output ''doesnt'' flow over the screen, <code>less</code> quits immediately | ||
* Automatically detects if the output is to a terminal or pipe, utilizing <code>less</code> and highlighting for the former | * Automatically detects if the output is to a terminal or pipe, utilizing <code>less</code> and highlighting for the former | ||
| + | * By default uses case ''insensitive'' search, just setting GREP_OPTIONS (even to empty) will disable this | ||
<source lang="bash"> | <source lang="bash"> | ||
#!/bin/bash | #!/bin/bash | ||
| − | if [ $# -lt | + | if [ $# -lt 1 ]; then |
echo "usage:" | echo "usage:" | ||
| − | echo " $0 <expression> | + | echo " $0 <expression> [directory] [filename..]" |
exit 1 | exit 1 | ||
fi | fi | ||
EXPRESSION="$1"; shift | EXPRESSION="$1"; shift | ||
| − | |||
if [ $# -lt 1 ]; then | if [ $# -lt 1 ]; then | ||
| − | FILES="-name '*.c' -or -name '*.h'" | + | DIRECTORY="." |
| + | else | ||
| + | DIRECTORY="$1"; shift | ||
| + | fi | ||
| + | |||
| + | if [ $# -lt 1 ]; then | ||
| + | FILES="-name '*.c' -or -name '*.cpp' -or -name '*.h'" | ||
else | else | ||
FILES="-name '$1'"; shift | FILES="-name '$1'"; shift | ||
| Line 30: | Line 37: | ||
done | done | ||
fi | fi | ||
| + | CMD="find \"${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> | ||
Latest revision as of 10:34, 13 March 2013
This is a useful tool that extends grep.
- Expression input is at the front, allowing quick & easy editing
- Search directory defaults to
., but can be easily modified - Files checked defaults to '
*.c', '*.cpp' and '*.h', but can be easily changed - Recursively locates all files matching given names (e.g:
*.c) - Multiple filenames / masks / patterns 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 - By default uses case insensitive search, just setting GREP_OPTIONS (even to empty) will disable this
#!/bin/bash if [ $# -lt 1 ]; then echo "usage:" echo " $0 <expression> [directory] [filename..]" exit 1 fi EXPRESSION="$1"; shift if [ $# -lt 1 ]; then DIRECTORY="." else DIRECTORY="$1"; shift fi if [ $# -lt 1 ]; then FILES="-name '*.c' -or -name '*.cpp' -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
