The Dockerfile.nojava File in the Docker Demonstration for the Visual COBOL Base Image

This topic lists and describes the Dockerfile.nojava file from the Docker demonstration for the Visual COBOL base image. The Dockerfile is listed in its entirety and a following table describes the various Dockerfile commands. The line numbers in the listings of the Dockerfile have been added to aid readability. They are not present in the supplied Dockerfile.

001  # Copyright (C) Micro Focus 2019. All rights reserved. 
002  
003  ARG BASE_SUFFIX=
004  FROM microsoft/dotnet-framework${BASE_SUFFIX}
005  
006  # PRODUCT_VERSION is product version associated with this Dockerfile
007  # MFLICFILE is the build-arg for the license filename
008  # ACCEPT_CONTAINER_EULA is the build-arg for the accepting the end user license argument
009  # SETUP_EXE is the build-arg name for installer exe to be used
010  # TOOLS_LOC is build-arg name for installation location of the tools
011  ARG PRODUCT_VERSION=a.b.cc
012  ARG MFLICFILE
013  ARG ACCEPT_CONTAINER_EULA=no
014  ARG SETUP_EXE=vcbt_50.exe
015  ARG TOOLS_LOC=c:\\VCTools
016  ARG TMP_INST_DIR=c:\\vc50tmp
017  
018  LABEL vendor="Micro Focus" \
019        com.microfocus.name="Visual COBOL" \
020        com.microfocus.version="$PRODUCT_VERSION" \
021        com.microfocus.eula.url="https://supportline.microfocus.com/licensing/agreements.aspx" \
022        com.microfocus.is-base-image="true" \
023  
024  # transfer build arguments to environment vars
025  ENV TOOLS_LOC=${TOOLS_LOC} \
026      RMT_DIR="C:\\Program Files (x86)\\Common Files\\SafeNet Sentinel\\Sentinel RMS License Manager\\WinNT"
027  
028  # Use cmd.exe, the microsoft/dotnet-framework-build changes this to powershell, so we need to reset
029  SHELL ["cmd", "/S", "/C"]
030  
031  # Copy the setup .exe and license to the image
032  COPY ${SETUP_EXE} "${TMP_INST_DIR}\\"
033  COPY ${MFLICFILE} "${TOOLS_LOC}\\"
034  
035  # Do the actual installation
036  RUN set TMP_INST_DIR=${TMP_INST_DIR} && \
037      set SETUP_EXE=${SETUP_EXE} && \
038      set ACCEPT_CONTAINER_EULA=${ACCEPT_CONTAINER_EULA} && \
039      cd %TMP_INST_DIR% && start "" /wait %SETUP_EXE% /q "InstallFolder=%TOOLS_LOC%" /l log.txt accepteula=%ACCEPT_CONTAINER_EULA%
040  
041  # Check log.txt
042  RUN cd %TMP_INST_DIR% && \
043      findstr /ic:"Exit Code: 0x0" log.txt || (echo "Install failed - error messages in log.txt" && findstr /ic:"error" log.txt && findstr /ic:"Exit Code:" log.txt && exit 1)
044  
045  # License the image
046  RUN set TOOLS_LOC=${TOOLS_LOC} && \
047      set MFLICFILE=${MFLICFILE} && \
048      cd %TOOLS_LOC% && \
049      "%RMT_DIR%\\MFLicenseAdmin.exe" -install %MFLICFILE%
050  
051  # Cleaup directory
052  RUN set TMP_INST_DIR=${TMP_INST_DIR} && \
053      cd \ && rmdir /S /Q %TMP_INST_DIR%
054  
055  # set the default directory to tools directory
056  WORKDIR "${TOOLS_LOC}"

The commands on the lines in this Dockerfile are as follows:

Lines	Description
003 - 004	Specifies that the base image to use is the official Docker image for .NET Framework on Windows Server 2016 Server Core.
011 - 016	Define build arguments passed by the docker build command: PRODUCT_VERSION. Indicates the version of Visual COBOL that this Dockerfile is supplied with. MFLICFILE. Specifies the name of the license file to use for Visual COBOL. ACCEPT_CONTAINER_EULA. Indicates acceptance of the terms laid out in the license agreement. The default setting of "no" means that you must modify this in order to indicate that you accept the terms of the license agreement. SETUP_EXE. Specifies the name of the Visual COBOL installation file. The default setting is the name of the file supplied with Visual COBOL. TOOLS_LOC. Specifies the folder into which Visual COBOL will be installed. TMP_INST_DIR. Specifies a temporary directory to be used while building the image. It is deleted when it is no longer needed. Note: Unlike Dockerfile and Dockerfile.oraclejava, Dockerfile.nojava does not need to define any Java-related arguments.
018 - 022	Specify the metadata labels for the image that will be created. These labels can be queried using the docker inspect command. Note: Unlike Dockerfile and Dockerfile.oraclejava, Dockerfile.nojava does not need to include an entry for com.microfocus.third_parties.java.
025 - 026	Create environment variables to be used in this Dockerfile: TOOLS_LOC is copied from the build argument defined previously. RMT_DIR specifies the location of the COBOL licensing management software. This is installed when you install Visual COBOL. Note: Unlike Dockerfile and Dockerfile.oraclejava, Dockerfile.nojava does not need to define any Java-related arguments.
029	Specifies that the shell to be used for subsequent instructions is `["cmd", "/S", "/C"]`. This is the default for Dockerfiles on Windows but needs to be specified explicitly here because the base image for this Dockerfile is a Microsoft .NET Framework "-build" image, and using that image causes PowerShell to be used as the shell.
032 - 033	Copies the Visual COBOL installation file into the temporary folder and the Visual COBOL license file into the folder where Visual COBOL is to be installed.
036 - 039	Run the Visual COBOL installation file specifying parameters to install it silently, into the required directory, creating a log file, and indicating that you have accepted the terms laid out in the license agreement.
042 - 043	Runs a series of concatenated Windows commands to search the Visual COBOL installation log file for text indicating that the installation failed. If any such text is found no further processing takes place.
046 - 049	Runs a series of concatenated Windows commands to license Visual COBOL.
052 - 053	Runs a series of concatenated Windows commands to delete the Visual COBOL installation file and the temporary directory that was used to contain it.
056	Sets the Docker working directory to be the directory into which Visual COBOL was installed.