/
cmd.go
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/
cmd.go
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// Copyright 2020 The SQLFlow Authors. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package executor
import (
"fmt"
"log"
"os/exec"
)
func tryRun(cmd string, args ...string) bool {
return exec.Command(cmd, args...).Run() == nil
}
func hasPython() bool {
return tryRun("python", "-V")
}
func hasTensorFlow() bool {
return tryRun("python", "-c", "import tensorflow")
}
func hasDatabaseConnector(driverName string) bool {
if driverName == "hive" {
return tryRun("python", "-c", "from impala.dbapi import connect")
} else if driverName == "mysql" {
return tryRun("python", "-c", "from MySQLdb import connect")
} else if driverName == "maxcompute" {
return tryRun("python", "-c", "from odps import ODPS")
}
return false
}
func hasDocker() bool {
return tryRun("docker", "version")
}
func hasElasticDLCmd() bool {
return tryRun("elasticdl", "-h")
}
func hasDockerImage(image string) bool {
b, e := exec.Command("docker", "images", "-q", image).Output()
if e != nil || len(b) == 0 {
return false
}
return true
}
func sqlflowCmd(cwd, driverName string) (cmd *exec.Cmd) {
if hasPython() && hasTensorFlow() && hasDatabaseConnector(driverName) {
cmd = exec.Command("python", "-u")
cmd.Dir = cwd
} else if hasDocker() {
const tfImg = "sqlflow/sqlflow"
if !hasDockerImage(tfImg) {
// TODO(yancey1989): write log into pipe to avoid the wrong row/
//log.Printf("sqlflowCmd: No local Docker image %s. It will take a long time to pull.", tfImg)
}
cmd = exec.Command("docker", "run", "--rm",
fmt.Sprintf("-v%s:/work", cwd),
"-w/work", "--network=host", "-i", tfImg, "python")
} else if hasPython() {
// NOTE: some docker images (for example server images on Dataworks) do not
// install TensorFlow and Docker. Just run the Python code directly.
cmd = exec.Command("python", "-u")
cmd.Dir = cwd
} else {
log.Fatalf("No local TensorFlow, Docker and Python. No way to run the program")
}
return cmd
}