Created
May 6, 2017 23:00
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Docker build with template
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| #! /usr/bin/env python | |
| """ | |
| <usage> ./dockerbuild.in <dockerfile.in> [dockerfile.in variables...] [docker build options...] | |
| dockerfile.in variables can be passed in a format of "var:=value". | |
| For example, if Dockerfile.in is the following: | |
| ``` | |
| FROM ubuntu:{ubuntu_version} | |
| RUN apt-get update | |
| ``` | |
| `dockerfile.in`s option should be like: | |
| ``` | |
| ./dockerfile.in Dockerfile.in ubuntu_version:=16.04 [docker build options...] | |
| ``` | |
| , then it will generates the following Dockerfile, and build it. | |
| ``` | |
| FROM ubuntu:16.04 | |
| RUN apt-get update | |
| ``` | |
| """ | |
| import sys | |
| import tempfile | |
| import subprocess | |
| import os | |
| import shutil | |
| def main(): | |
| av = sys.argv[2:] | |
| dockerin = sys.argv[1] | |
| rest = [] | |
| var = {} | |
| for v in av: | |
| var_val = v.split(":=") | |
| if len(var_val) == 2: | |
| var[var_val[0]] = var_val[1] | |
| continue | |
| rest.append(v) | |
| str_dockerfile = open(dockerin, 'r').read().format(**var) | |
| name_dockerfile = None | |
| dockerdir = tempfile.mkdtemp() | |
| dockerfile = os.path.join(dockerdir, 'Dockerfile') | |
| with open(dockerfile, 'w') as fd: | |
| fd.write(str_dockerfile) | |
| print "Generated docker file --------------------------------------------------------" | |
| print str_dockerfile | |
| print "------------------------------------------------------------------------------" | |
| cmd = ['docker', 'build', dockerdir] + rest | |
| print "Run docker build with the following commands ---------------------------------" | |
| print cmd | |
| print "------------------------------------------------------------------------------" | |
| p = subprocess.Popen(cmd) | |
| p.communicate() | |
| shutil.rmtree(dockerdir) | |
| if __name__ == '__main__': | |
| main() |
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