This script triggers (re)build of the specified project on Travis CI.

travis-trigger-build

#!/bin/bash
#
# This script triggers (re)build of the specified project on Travis CI.
#
# It expects Travis token to be set in environment variable TRAVIS_TOKEN.
# To get a token, run: travis token.
#
# Usage:
#   travis-build-dependent <REPO_SLUG> [<BRANCH>]
#
#   REPO_SLUG  the repository to build, typically username/project-name.
#   BRANCH     the branch to build (default is 'master').

message="Triggered by successful build of $TRAVIS_REPO_SLUG"

repo_slug=$1
branch=${2:-master}

body="{
  'request': {
    'message': '$message',
    'branch': '$branch'
  }
}"

echo "Triggering build of $repo_slug branch $branch on Travis."
curl -X POST \
    -H "Content-Type: application/json" \
    -H "Accept: application/json" \
    -H "Travis-API-Version: 3" \
    -H "Authorization: token $TRAVIS_TOKEN" \
    -d "${body//\'/\"}" \
    https://api.travis-ci.org/repo/${repo_slug/\//%2F}/requests

I mean deal.