A simple, configurable, file watching, job execution tool implemented in Go.
gawp
ɡɔːp/
verb, British, informal
stare openly in a stupid or rude manner.
Installation
go get -u gopkg.in/fsnotify.v1
go get -u gopkg.in/yaml.v2
go get -u github.com/martingallagher/gawp
The following assumes your Go $GOPATH/bin is on your $PATH environmental variable (export PATH=$PATH:$GOPATH/bin).
Configuration
By default Gawp attempts to read .gawp in the active directory. The file format is YAML.
The configuration file location can be set using the -config my.conf command-line flag.
Example .gawp file:
recursive: true # Watch directories recursively, default: true
verbose: false # Verbose logging, default: false
workers: 4 # Number of concurrent workers (high numbers can thrash IO), default: number CPUs / 2 (minimum 1)
#logfile: gawp.log # Gawp logfile, default: stdout
#start:
# - start myscript
#stop:
# - echo STOPPING!
write, create, rename: # Actionable events (supported: create, write, rename, remove, chmod), executed sequentially
(?i)([a-z]+)\.src\.js$: # Rules are regular expression strings (https://code.google.com/p/re2/wiki/Syntax)
- msg=`jshint $file`; if [ "$msg" ]; then notify-send -t 2000 "$msg"; fi
- java -jar ~/compiler.jar -O=ADVANCED --language_in=ECMASCRIPT5_STRICT --formatting=SINGLE_QUOTES --define='DEBUG=false' --js_output_file=scripts/$1.js $file
(?i)[a-z]+\.scss:
- compass compile --boring --time -s compressed --css-dir styles/ $file
- echo HELLO DENNIS! # Rules can have multiple commands; output is written as-is to the Gawp log
create:
.*:
- echo created $file # Rule submatches and file path can be accessed via $1, $2 ... $n (nth submatch) and $file
remove:
.*:
- echo removed $fileConfiguration defaults fulfil most user's requirements, resulting in a config file that just defines rules:
write, create, rename:
(?i)([a-z]+)\.src\.js$:
- msg=`jshint $file`; if [ "$msg" ]; then notify-send -t 2000 "$msg"; fi
- java -jar ~/compiler.jar -O=ADVANCED --language_in=ECMASCRIPT5_STRICT --formatting=SINGLE_QUOTES --define='DEBUG=false' --js_output_file=scripts/$1.js $file
(?i)[a-z]+\.scss:
- compass compile --boring -s compressed --css-dir styles/ $file
create:
.*:
- echo created $file
remove:
.*:
- echo removed $fileUsage
Assuming correctly configured web/assets/.gawp file: cd web/assets/ && gawp
Atomic Save Support
Some IDE's e.g. NetBeans, perform "atomic" saves. Gawp attempts to detect such operations, running the matching rule commands only once. The threshold duration setting for detecting atomic saves atomicthreshold can be adjusted if you find it is too liberal/conservative for your underlying storage.
Commands
Gawp does no command validation. It pre-processes them, replacing variables and executes blindly. Rules can contain subcommands, which is useful when you need to use subcommand results. For example, on Linux/Ubuntu you might wish to lint the edits to your JavaScript files and create an alert via notify-send:
write:
(?i)([a-z]+)\.src\.js$:
- msg=`jshint $file`; if [ "$msg" ]; then notify-send -t 2000 "$msg"; fiIf there's output from jshint, a notification bubble will be displayed to the user with the result.
Contributions
Bug fixes and feature requests welcome.
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