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dilawar....@gmail.com
Apr 11, 2014, 10:45:02 AM4/11/14
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<p>Following is the code for copying pasting in bash.</p>
<pre><code> #!/bin/bash
# Find a file recursively containing a pattern
if [ $# -eq 1 ]; then
pattern="$1"
glob_pattern=".*"
dir_pattern="."
elif [ $# -eq 2 ]; then
pattern="$1"
glob_pattern="$2"
dir_pattern="."
elif [ $# -eq 3 ]; then
pattern="$1"
glob_pattern="$2"
dir_pattern="$3"
else
echo "Usage: $0 text_pattern [glob_pattern] [dir_pattern]"
exit
fi
#echo "Searching $dir_pattern for text $pattern in files $glob_pattern"
files=`find $dir_pattern -type f -name "$glob_pattern"`
for f in $files; do
grep -Hnr -B 1 -A 1 "$pattern" $f
done</code></pre>
<p>This script takes three arguments: last two are optional.</p>
<ul>
<li>First argument is the text pattern you want to search in text files.</li>
<li>Second argument is the pattern of file you wants to filters e.g. <em>.cpp </em>.h etc. If not given, all files will be searched.</li>
<li>Third argument is the direction in which do want to do searching. If not given, current directory will be searched.</li>
</ul>
<p>Updated version of this script can be found <a href="http://github.com/dilawar/Scripts/g">here</a>.</p>
<h2 id="usage-example">Usage example</h2>
<p>Lets name is script g and save it somewhere in PATH (e.g. /usr/local/bin) after making it executable. I want to search all header files containing the word <code>kolomogorov</code>. I also know that any file containing this word is most likely to be found in <code>/usr/include</code> folder.</p>
<pre><code> $g kolmogorov *.h /usr/include </code></pre>
<p>The output will be a list of following entries.</p>
<pre><code> /usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp-158- // the complete class is protected, as we want access to members in
/usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp:159: // derived test-class (see test/boykov_kolmogorov_max_flow_test.cpp)
/usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp-160- protected:
--
</code></pre>
<p>It tells you the file path and line no where the pattern can be found. We can be more ambitious and feed a regex to it. As you can see, we are using <code>grep</code> command to sniff the pattern so whatever regex is accepted by this command is good enough for this script.</p>
<p>This script can be used to search complicated expression in large code base. You may also like to check an application called <code>source navigator</code> (snavigator). It is a gui based application which does its job quite well. Using exuberant-ctags is also recommended but once a while there will be a situation when you would like to check if a file contains some pattern of text.</p>
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<p>Following is the code for copying pasting in bash.</p>
<pre><code> #!/bin/bash
# Find a file recursively containing a pattern
if [ $# -eq 1 ]; then
pattern="$1"
glob_pattern=".*"
dir_pattern="."
elif [ $# -eq 2 ]; then
pattern="$1"
glob_pattern="$2"
dir_pattern="."
elif [ $# -eq 3 ]; then
pattern="$1"
glob_pattern="$2"
dir_pattern="$3"
else
echo "Usage: $0 text_pattern [glob_pattern] [dir_pattern]"
exit
fi
#echo "Searching $dir_pattern for text $pattern in files $glob_pattern"
files=`find $dir_pattern -type f -name "$glob_pattern"`
for f in $files; do
grep -Hnr -B 1 -A 1 "$pattern" $f
done</code></pre>
<p>This script takes three arguments: last two are optional.</p>
<ul>
<li>First argument is the text pattern you want to search in text files.</li>
<li>Second argument is the pattern of file you wants to filters e.g. <em>.cpp </em>.h etc. If not given, all files will be searched.</li>
<li>Third argument is the direction in which do want to do searching. If not given, current directory will be searched.</li>
</ul>
<p>Updated version of this script can be found <a href="http://github.com/dilawar/Scripts/g">here</a>.</p>
<h2 id="usage-example">Usage example</h2>
<p>Lets name is script g and save it somewhere in PATH (e.g. /usr/local/bin) after making it executable. I want to search all header files containing the word <code>kolomogorov</code>. I also know that any file containing this word is most likely to be found in <code>/usr/include</code> folder.</p>
<pre><code> $g kolmogorov *.h /usr/include </code></pre>
<p>The output will be a list of following entries.</p>
<pre><code> /usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp-158- // the complete class is protected, as we want access to members in
/usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp:159: // derived test-class (see test/boykov_kolmogorov_max_flow_test.cpp)
/usr/include/boost/graph/boykov_kolmogorov_max_flow.hpp-160- protected:
--
</code></pre>
<p>It tells you the file path and line no where the pattern can be found. We can be more ambitious and feed a regex to it. As you can see, we are using <code>grep</code> command to sniff the pattern so whatever regex is accepted by this command is good enough for this script.</p>
<p>This script can be used to search complicated expression in large code base. You may also like to check an application called <code>source navigator</code> (snavigator). It is a gui based application which does its job quite well. Using exuberant-ctags is also recommended but once a while there will be a situation when you would like to check if a file contains some pattern of text.</p>
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