rep is a command-line utility that takes grep-formatted lines via standard input, and performs a find-and-replace on them. By default, it outputs a diff-preview of the changes to standard output, and with a flag it can write the changes to the files in place.
Output a diff to standard output replacing foo with bar:
grep -n foo *` | rep foo bar
Add the -w flag to write the changes to the files in place:
grep -n foo *` | rep foo bar -w
The -n (--line-number) option is required so that grep outputs the line number for each match.
rep is available via cargo:
cargo install rep-grep
The default pager is less, the REP_PAGER environment variable can be used to override the pager (e.g., export REP_PAGER=delta in Bash).
rep -h (or rep --help, --help provides slightly longer explanations of some options) will list help for all the command-line flags.
repwas inspired bywgrepfor Emacs, which allows editinggrepresults in an Emacs buffer and then writing those changes to the source files.- Much of the functionality, and the overall structure of the source code, was borrowed
sd.repbegan as a fork ofsd. - The code for specifying a custom pager for
repwas borrowed fromdelta.