reflex

Watch and run command

$ reflex [command]

$ reflex -r '\.go$' [go build]

$ reflex -d [src/] [command]

$ reflex -r '\.go$' -r '\.html$' [command]

$ reflex -s [command]

$ reflex -d [.] -- [sh -c "echo changed"]

$ reflex -r '\.go$' -R 'vendor/' [command]

reflex [-r regex] [-d dir] [-R exclude] [options] command

reflex watches files and runs commands on changes. It's a flexible file watcher for development.
Regex patterns filter which files trigger. Multiple patterns combine for complex matching.
Service mode runs a long-running process. The process restarts on changes.
Exclusions ignore vendor directories or build output. Prevents unnecessary rebuilds.
Configuration files define complex watch rules. Multiple watchers in one file.

-r REGEX

Include pattern.

Exclude pattern.

Watch directory.

Start service (no initial run).

Glob pattern.

Config file.

Match all files.

Output decoration.

.reflex

Project-level configuration file defining watch rules, one per line, with regex patterns and commands. Loaded automatically when present in the current directory.

Polling fallback on some filesystems. Rapid changes may batch. Initial run may not be wanted.

Reflex was created as a simple, flexible file watcher. It focuses on development workflow automation with minimal configuration.

entr(1), watchman(1), fswatch(1), inotifywait(1)