Shell Script

Berikut ini kita akan ulas tentang otomatisasi dalam Shell Script dengan Regular expression

Table of Contents Shell Script Cloud Build Docker Script Regular expression Pattern Sed Quote

Shell Script

Cloud Build

• Biaya Cloud Build

Biaya Cloud Build untuk build-menit yang dikonsumsi di atas ambang batas tertentu.

Docker

• Quickstart for Docker

FROM alpine
COPY init.sh /
CMD ["/init.sh"]

Script

#!/bin/sh
 if [ -d /home/chetabahana/.docker/backend ]; then
 	cd /home/chetabahana/.docker/backend && docker-compose down --volumes
 	cd .. && sudo rm -rf /home/chetabahana/.docker/backend
 fi
 gcloud source repos clone github_chetabahana_backend backend
 cd /home/chetabahana/.docker/backend/scripts && chmod +x main.sh && ./main.sh
 #EOF

Regular expression

Pattern

Sed

• GNU sed
• Sed pattern matching

sed 's/ [ ]* / /g'
\_/  | \____/ | |
 |   |    |   | \- g=globally (not just one occurence)
 |   |    |   |
 |   |    |   \- to
 |   |    |
 |   |    \- from
 |   |
 |   \- s=substitute
 |
 \- program sed


The from part:
/ [ ]* /
| \_/| 
|  | \- repeated 0-infinite times
|  |
|   \- group of characters
|
\- boundary

Contoh

• Simpel Tutorial

$ echo 'href="{{ grandchild.url }}"' | \
  sed 's|href="{{ grandchild.url }}"|href="/market{{ grandchild.url }}"|g'
href="/market{{ grandchild.url }}"

$ echo 'href="{{ grandchild.url }}"' | \
  sed 's|href="{{ \([a-zA-Z0-9_]*\).url|href="/market{{ \1.url|g'
href="/market{{ grandchild.url }}"

Quote

• How to escape a double quote inside double quotes?