This topic lists and describes the Dockerfile.x86 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 2018. All rights reserved.
002
003 ARG DTAGVER=
004 ARG BASE_SUFFIX=
005 FROM microfocus/vcbuildtools${BASE_SUFFIX}:${DTAGVER}
006
007 # copy the powershell script to convert cblpromp -J output to setx command
008 ADD convsetx.ps1 "c:\convsetx.ps1"
009
010 # ensure msbuild is always on the PATH
011 RUN setx /M PATH "%PATH%;C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319"
012
013 # convert the output of cblprompt into SETX commands and execute them
014 RUN cd %TOOLS_LOC% && \
015 bin\cblpromp.exe -J >env.prop && \
016 powershell -file "c:\convsetx.ps1" >envsetx.bat && \
017 envsetx.bat && \
018 del envsetx.bat && \
019 del env.prop && \
020 del "c:\convsetx.ps1"
The commands on the lines in this Dockerfile are as follows:
| Lines | Description |
|---|---|
| 003 - 004 | Define build arguments passed by the docker build command. |
| 005 | Specifies that the base image to use is the image built from Dockerfile. |
| 008 | Copies the convsetx.ps1 PowerShell script to the image's filesystem. |
| 011 | Updates the PATH environment variable to enable the use of MSBuild. |
| 014 - 020 | Run a series of concatenated Windows commands to ensure that all environment variables set by the COBOL command prompt are available to applications in this image. |