Awesome
Go Replace
Go Replace (gr) is a simple utility which can be used as replacement for grep + sed combination in one of most popular cases - find files, which contain something, possibly replace this with something else. Main points:
- Reads
.hgignore
/.gitignore
to skip files - Skips binaries
- Familiar PCRE-like regexp syntax
- Can perform replacements
- Fast
Bonus:
- Can search in file names with
-f
(i.e. a simple alternative tofind
)
Why
Why do thing which is done by grep, find, and sed? Well, for one - I grew tired of typing long commands with pipes and ugly syntax. You want to search? Use grep. Replace? Use find and sed! Different syntax, context switching, etc. Switching from searching to replacing with gr is 'up one item in history and add a replacement string', much simpler!
Besides, it's also faster than grep! Hard to believe, and it's a bit of cheating -
but gr by default ignores everything you have in your .hgignore
and
.gitignore
files, skipping binary files and compiled bytecodes (which you
usually don't want to touch anyway).
This is my reason to use it - less latency doing task I'm doing often.
Installation
Just download a suitable binary from
release page. Put this file in
your $PATH
and rename it to gr
to have easier access.
Building from source
You can also install it from source, if that's your thing:
go get github.com/piranha/goreplace
And you should be done. You have to have $GOPATH
set for this to work (go
will put sources and generated binary there). Add -u
flag there to update your
gr
.
I prefer name gr
to goreplace
, so I link gr
somewhere in my path (usually
in ~/bin
) to $GOPATH/bin/goreplace
. NOTE: if you use oh-my-zsh
, it
aliases gr
to git remote
, so you either should use another name (I propose
gor
) or remove gr
alias:
mkdir -p ~/.oh-my-zsh/custom && echo "unalias gr" >> ~/.oh-my-zsh/custom/goreplace.zsh
Usage
Usage is pretty simple, you can just run gr
to see help on options. Basically
you just supply a regexp (or a simple string - it's a regexp always as well) as
an argument and gr will search for it in all files starting from the
current directory, just like this:
gr somestring
Some directories and files can be ignored by default (gr
is looking for your
.hgignore
/.gitignore
in parent directories), just run gr
without any
arguments to see help message - it contains information about them.
And to replace:
gr somestring -r replacement
It's performed in place and no backups are made (not that you need them, right?
You're using version control, aren't you?). Regular expression submatches
supported via $1
syntax - see
re2 documentation for more
information about syntax and capabilities.