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https://issues.apache.org/jira/browse/MNG-6191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941171#comment-15941171
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Stephen Connolly commented on MNG-6191:
---------------------------------------

how about 

{code}
        basedir="$(cd "$(dirname "${arg}")" && pwd -P)"
{code}

> mvn -f complains about illegal readlink option under macOS
> ----------------------------------------------------------
>
>                 Key: MNG-6191
>                 URL: https://issues.apache.org/jira/browse/MNG-6191
>             Project: Maven
>          Issue Type: Bug
>          Components: Command Line
>    Affects Versions: 3.5.0-alpha-1
>         Environment: Java version: 1.8.0_111, vendor: Oracle Corporation
> Java home: 
> /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre
> Default locale: en_US, platform encoding: UTF-8
> OS name: "mac os x", version: "10.10.5", arch: "x86_64", family: "mac"
>            Reporter: Andreas Sewe
>            Priority: Minor
>
> This is a *regression* from Maven 3.3.9. With 3.5.0-alpha-1, using {{mvn -f}} 
> under OS X causes the following error to be printed out (similar to 
> MNG-5688), before the command proceeds (AFAICT) without error:
> {noformat}
> > mvn clean package -f releng/repository/pom.xml
> readlink: illegal option -- f
> usage: readlink [-n] [file ...]
> usage: dirname path
> [INFO] Scanning for projects...
> {noformat}
> FWIW, I don’t get this error on a normal {{mvn clean package}} without the 
> {{-f}} parameter.



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