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#BASH HOW TO SEARCH MULTIPLE FILES FOR STRINGS IN COMMON CODE#

that occurrences zero or more times * while they are optional followed by a pattern( fax or phone). You can append as many filenames as needed. The terminal prints the name of every file that contains the matching lines, and the actual lines that include the required string of characters. (?s) Known "dot-all" which tells grep to allow the dot. To search multiple files with the grep command, insert the filenames you want to search, separated with a space character. (?=pattern): Positive Lookahead: The positive lookahead construct is a pair of parentheses, with the opening parenthesis followed by a question mark and an equals sign. Or assuming there is no \newline in files name, then: grep -lP '(?s)(?=.*?fax)(?=.*?phone)' * |xargs -d'\n' grep -L address execdir bash -c 'grep -L "address" "$(grep -l "phone" "$(grep -l "fax" " \ \ findĪbove example may not work well with files with whitespaces, so here is the version with find: find. If you're working with large data, consider using ripgrep instead.

Filter further down to exclude files not having address ( grep -L "address" $(cmd)).

Filter found filenames which are having "phone" pattern ( grep -l "phone" $(cmd)).

Find the filenames having the "fax" pattern ( grep -rl "fax".

Here is the grep syntax which uses chain of command substitutions: grep -L "address" $(grep -l "phone" $(grep -rl "fax". To change the pattern type, you may also use -G/ -basic-regexp (default), -F/ -fixed-strings, -E/ -extended-regexp, -P/ -perl-regexp, -f file, and other.Ĭheck man git-grep for further help. q/ -quiet/ -silent Do not output matched lines exit with status 0 when there is a match. threads Number of grep worker threads to use. l/ -files-with-matches/ -name-only Show only the names of files. no-index Search files in the current directory that is not managed by Git. all-match When giving multiple pattern expressions, this flag is specified to limit the match to files that have lines to match all of them. You can combine different patterns with Boolean expressions such as -and, -or and -not. It might be a learning curve, but, reading through this introduction is a good start.You can use git grep for multiple patterns combined using Boolean expressions, e.g.: git grep -all-match -no-index -e "fax" -and -e "phone" -and -not -e "address" The list goes on!Īll you need to do is write the loop commands. For instance, you can track files and perform many other tasks. Apart from the basic examples above, you can do a lot more. grep example document Searching multiple files for a text string with grep The output from grep shows us which files the string was found in. grep example document1.txt document2.txt You can also use wildcards in the commmand. Conclusionīash for loop is great for automating repetitive tasks. If you want to search multiple files, just append as many to the command as you’d like. It will then execute the second code, which is printing a text which says Yes, that’s all. The statement tells the loop to break the operation once the condition is true (finding the term Jakarta). Remember, that bash functions need to be in a. When using this function, our loop command would look like this: for city in Manila Bangkok Jakarta Kuala Lumpur Meanwhile, if you’re having trouble with bash, you should check out our guide to the basic bash function. This can be followed by another instruction. The loop allows you to stop the operation if it meets the stated condition. Using Bash for Loop to Create a Conditional Exit with Break Loop

#BASH HOW TO SEARCH MULTIPLE FILES FOR STRINGS IN COMMON CODE#

Since the value 4 matched the continue statement, the loop didn’t perform the code and moved on to the next value, which is 5. The output for this bash sequence would be: Hai 1 #!/bin/bashīash version 4.0+ allows you to use the You can write the code differently depending on the version of bash you’re running:īash version 3.0+ can shorten the range with “. Remember quotation marks turn anything inside it into one variable. echo “Hello: $i” – is the code which we will repeat n times.It will then execute the instruction n times, with n being the total number of items. do – is the keyword that starts the loops.

1 2 3 4 5 – is an example of items you want to perform the instruction on.in – separates the variable and the items that follow.

You can also write it as c/$c or by any other name Meanwhile, $i is the individual value of the variable. #!/bin/bash – shows that the code is a bash script.In the real world, this syntax would look like the example below: #!/bin/bashĮxecuting the bash file will cause the following sequence: Hello 1 The bash sequence typically looks like this: for VARIABLE in 1 2 3 4 5. Using Bash for Loop to Create a Conditional Exit with Break Loopīasically, the simplest for loop syntax repeats the occurrence of a set of a variable.Using Bash for Loop to Create The Skip and Continue Loop.Using Bash For Loop to Create a Three-Expression Loop.Using Bash For Loop to Create an Infinity Loop.