Skaffold build fails with COPY target/*.jar /deployments/ on Windows 10

[igdianov]

Expected behavior

Running skaffold build command should sucesfully build docker container image from Dockerfile containing ADD or COPY target/*.jar /destination instructions with source wildcards.

# Dockerfile
FROM fabric8/java-jboss-openjdk8-jdk:1.2
ENV JAVA_APP_DIR=/deployments

COPY target/*.jar /deployments/

Actual behavior

The build command fails with the error:

$ skaffold build -v debug
INFO[0000] Skaffold &{Version:v0.7.0 GitVersion: GitCommit:71021311d4f4db76044e5fcf8d862bd644744e79 GitTreeState:clean BuildDate:2018-06-07T16:24:34Z GoVersion:go1.10 Compiler:gc Platform:windows/amd64}
INFO[0000] Using kubectl context: minikube
DEBU[0000] Using builder: local
DEBU[0000] Running command: [minikube docker-env --shell none]
DEBU[0000] Command output: stdout DOCKER_TLS_VERIFY=1
DOCKER_HOST=tcp://192.168.99.138:2376
DOCKER_CERT_PATH=C:\Users\Igor\.minikube\certs
DOCKER_API_VERSION=1.23
, stderr:
DEBU[0000] skipPush value not present. defaulting to cluster default true (minikube=true, d4d=true, gke=false)
Starting build...
Found [minikube] context, using local docker daemon.
DEBU[0000] Running docker build: context: ., dockerfile: Dockerfile
DEBU[0000] Checking base image fabric8/java-jboss-openjdk8-jdk:1.2 for ONBUILD triggers.
DEBU[0000] Found onbuild triggers [] in image fabric8/java-jboss-openjdk8-jdk:1.2
INFO[0000] Found dependencies for dockerfile [target/*.jar]
Sending build context to Docker daemon  2.048kB
Step 1/3 : FROM fabric8/java-jboss-openjdk8-jdk:1.2
 ---> 2fd9950a1808
Step 2/3 : ENV JAVA_APP_DIR=/deployments
 ---> Using cache
 ---> 7c31edae3fc5
Step 3/3 : COPY target/*.jar /deployments/
FATA[0000] build step: running build for artifact: running build: COPY failed: no source files were specified

Building image with docker image build . command works OK:

$ docker image build .
Sending build context to Docker daemon  54.91MB
Step 1/3 : FROM fabric8/java-jboss-openjdk8-jdk:1.2
 ---> 2fd9950a1808
Step 2/3 : ENV JAVA_APP_DIR=/deployments
 ---> Using cache
 ---> 7c31edae3fc5
Step 3/3 : COPY target/*.jar /deployments/
 ---> Using cache
 ---> 97fa34e00c83
Successfully built 97fa34e00c83

Information

• Skaffold version: 0.7.0
• Operating system: Windows 10
• Shell: GNU bash, version 4.3.42(5)-release (x86_64-pc-msys)
• Docker version:

Client:                                       
 Version:       18.03.0-ce                    
 API version:   1.23                          
 Go version:    go1.9.4                       
 Git commit:    0520e24302                    
 Built: Fri Mar 23 08:31:36 2018              
 OS/Arch:       windows/amd64                 
 Experimental:  false                         
 Orchestrator:  swarm                         
                                              
Server:                                       
 Engine:                                      
  Version:      17.12.1-ce                    
  API version:  1.35 (minimum version 1.12)   
  Go version:   go1.9.4                       
  Git commit:   7390fc6                       
  Built:        Tue Feb 27 22:20:43 2018      
  OS/Arch:      linux/amd64                   
  Experimental: false                         

• Contents of skaffold.yaml:

apiVersion: skaffold/v1alpha2
kind: Config
build:
  - imageName: image
    workspace: .
    docker: {}
  local: {}
deploy:
  kubectl:
    manifests:

Steps to reproduce the behavior

1. Create Dockerfile

FROM fabric8/java-jboss-openjdk8-jdk:1.2
ENV JAVA_APP_DIR=/deployments

COPY target/*.jar /deployments/

2. run mkdir target && echo app.jar > target/app.jar
3. run skaffold build

Bug Report

1. Replace line COPY target/*.jar /deployments/ with COPY target\\app.jar \\deployments\\ in Dockerfile
2. run skaffold build -v debug will work now. :)

$ DOCKER_CERT_PATH=C:\Users\Igor\.minikube\certs
DOCKER_API_VERSION=1.23
, stderr:
DEBU[0000] skipPush value not present. defaulting to cluster default true (minikube=true, d4d=true, gke=false)
Starting build...
Found [minikube] context, using local docker daemon.
DEBU[0000] Running docker build: context: ., dockerfile: Dockerfile
DEBU[0000] Checking base image fabric8/java-jboss-openjdk8-jdk:1.2 for ONBUILD triggers.
DEBU[0000] Found onbuild triggers [] in image fabric8/java-jboss-openjdk8-jdk:1.2
INFO[0000] Found dependencies for dockerfile [target\app.jar]
Sending build context to Docker daemon  3.072kB
Step 1/3 : FROM fabric8/java-jboss-openjdk8-jdk:1.2
 ---> 2fd9950a1808
Step 2/3 : ENV JAVA_APP_DIR=/deployments
 ---> Using cache
 ---> 7c31edae3fc5
Step 3/3 : COPY target\\app.jar \\deployments\
 ---> Using cache
 ---> b393edadb501
Successfully built b393edadb501
Successfully tagged 7d1aaf620b7d86c787c79ed7cb041ab1:latest
Successfully tagged image:810c4a1-dirty-f9bf0708473a6322
Build complete in 398.8942ms
image -> image:810c4a1-dirty-f9bf0708473a6322

[dcherniv]

@igdianov @r2d4
i believe this is related to my issue
#695
and other older issue:
#442
that was supposed to be fixed by this PR:
#489

It makes sense that it can't find the source because we are passing it unix style separators.
I think it should be fixed with the below PR:
#693

[jguo13]

Yea I was having the same issue and @dcherniv's PR fixed it

[dgageot]

I assume you also hit that bug: #709