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new Dockerfile keyword: cmd to set a default runtime command

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This commit is contained in:
Solomon Hykes 2013-05-01 16:43:37 -07:00
parent ad86dde10c
commit e7fb7f13d5
1 changed files with 12 additions and 2 deletions
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14
contrib/docker-build/docker-build
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@ -50,7 +50,7 @@ def image_exists(img):
return docker(["inspect", img]).read().strip() != ""
def image_config(img):
return json.loads(docker(["inspect", img]).read()).get("Config", {})
return json.loads(docker(["inspect", img]).read()).get("config", {})
def run_and_commit(img_in, cmd, stdin=None, author=None, run=None):
run_id = docker(["run"] + (["-i", "-a", "stdin"] if stdin else ["-d"]) + [img_in, "/bin/sh", "-c", cmd], stdin=stdin).read().rstrip()
@ -111,12 +111,22 @@ def main():
print "===> " + base
elif op == "expose":
config = image_config(base)
if config.get("PortSpecs") is None:
config["PortSpecs"] = []
portspec = param.strip()
config.setdefault("PortSpecs", []).append(portspec)
config["PortSpecs"].append(portspec)
result = run_and_commit(base, "# (nop) expose port {}".format(portspec), author=maintainer, run=config)
steps.append(result)
base=result
print "===> " + base
elif op == "cmd":
config = image_config(base)
cmd = list(json.loads(param))
config["Cmd"] = cmd
result = run_and_commit(base, "# (nop) set default command to '{}'".format(" ".join(cmd)), author=maintainer, run=config)
steps.append(result)
base=result
print "===> " + base
else:
print "Skipping uknown op " + op
except: