package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?:ALTER\ TABLE\ ONLY\ )
([^\n\r]+)[\n\r]
(?:ADD\ CONSTRAINT\ )
fk_\S+(?=.*REFERENCES\ ([^()]+))`)
var str = `ALTER TABLE ONLY document_labels
ADD CONSTRAINT fk_g71qgs6l2ufr3170u44j5fpk3 FOREIGN KEY (label_id) REFERENCES application_value(id);
ALTER TABLE ONLY rule_group_functionality_mapping
ADD CONSTRAINT fk_g8twyunj9bm096sqywdi8rcx8 FOREIGN KEY (rule_group) REFERENCES application_value(id);
ALTER TABLE ONLY time_track
ADD CONSTRAINT fk_gmpyguqbpm1ndjjsxvt03wq4g FOREIGN KEY (user_id) REFERENCES user_account(user_id);
ALTER TABLE ONLY document_labels
ADD CONSTRAINT fk_document_labels_application_value FOREIGN KEY (label_id)
REFERENCES application_value(id);`
var substitution = "ALTER TABLE $1\nADD CONSTRAINT fk_$1_$2"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/