Simple bash script retrieving jira releases

jira_release-notes.sh

#!/bin/bash
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################### USAGE ##################
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# Mostly inspired from http://blog.tremblay.pro/2014/10/extract-release-notes-from-jira.html
# 
# base_url:
# 		jira base URL without trailing slash (http://jira.domain.org)
# project:
#			project key (PROJ)
# version:
# 		version for which you want the release notes (1.0)
# user:
# 		user for HTTP_AUTH (simon)
# pass:
# 		pass for HTTP_AUTH (mySuperSafePassword)
#
# Usage: jira_release-notes.sh [base_url] [project] [version] [user] [password]
#	       jira_release-notes.sh http://jira.domain.org PROJ 1.0 simon mySuperSafePassword

base_url=$1
project=$2
version=$3
user=$4
user_pass=$5

# Seems complicated but I'm just adding a backslash before the . in 3.2
escaped_version=$(echo $version | sed "s/\([0-9]*\)\.\([0-9]*\)/\1\\\.\2/")

# Retrieve all versions and the id. Hoping a bit that the fields will stay in the same order
jira_version_id=$(curl -u "$user:$user_pass" --silent "$base_url/rest/api/2/project/$project/versions" | grep -o "\"id\":\"[0-9]*\",\"name\":\"$escaped_version\"" | cut -d'"' -f4)

# Retrieve project Id from key
jira_project_id=$(curl -u "$user:$user_pass" --silent "$base_url/rest/api/2/project/$project" | grep -o "\"id\":\"[0-9]*\",\"key\":\"$project\"" | cut -d'"' -f4)

# Get the page
release_notes_page="$base_url/secure/ReleaseNote.jspa?version=${jira_version_id}&styleName=Html&projectId=$jira_project_id"
release_notes=$(curl -u "$user:$user_pass" --silent "$release_notes_page")

# Extract the interesting info
echo "$release_notes" | sed -n "/<textarea rows=\"40\" cols=\"120\" id=\"editcopy\">/,/<\/textarea>/p" | grep -v "textarea"