entr

Run arbitrary commands when files change.

=> More information.

• Rebuild with make if any file in any subdirectory changes:

{ag -l} | entr {make}

• Rebuild and test with make if any .c source files in the current directory change:

{ls *.c} | entr {'make && make test'}

• Send a SIGTERM to any previously spawned ruby subprocesses before executing ruby main.rb:

{ls *.rb} | entr -r {ruby main.rb}

• Run a command with the changed file (/_) as an argument:

{ls *.sql} | entr {psql -f} /_

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