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<title>Controlling SCRAM Versions</title>
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<h1>Controlling SCRAM Versions</h1>
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<font color=red>S</font>oftware <font color=red>C</font>onfiguration,
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<font color=red>R</font>elease <font color=red>A</font>nd
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<font color=red>M</font>anagement
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</center>
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<h4>Contents:</h4>
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<ul>
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<li><a href=#Current>Checking the Current Version</a>
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<li><a href=#Download>Downloading SCRAM versions</a>
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<li><a href=#Default>Setting a Default version</a>
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<li><a href=#Over>Overriding the default selection</a>
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<li><a href=#Auto>Automated version selection</a>
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</ul>
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<hr>
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<a name=Current>
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<h2>Checking the Current Version</h2></a>
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The version of scram you are using can be found with the command<p>
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<pre>
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scram version
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</pre>
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<p>
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<a name=Download>
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<h2>Downloading Alternative SCRAM versions</h2></a>
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Once a version of SCRAM has been installed, downloading of other SCRAM versions
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becomes trivial with the <b>scram version</b> command.
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<br>
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If you supply a version number as an argument, SCRAM will check to see if the
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specified version is already installed. If it isn't then it will attempt to
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download the requested version automatically.
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<p>
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e.g.
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<pre>
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scram version V0_19_2
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</pre>
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<p>
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<a name=Default>
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<h2>Making a version the default</h2></a>
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Running the <em>install_scram</em> script of a specific version
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(see <a href=install.html>Installation Guide</a>)
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will make that version the default.<p>
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<a name=Over>
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<h2>Overriding the default Version</h2></a>
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The default version can be overridden at any time by setting the
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SCRAM_HOME environment variable to point to the top of the version
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required. It must be the full path to the version.
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<p>
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<a name=Auto>
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<h2>Automated Version Selection</h2></a>
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Scram can be made to automatically select the correct version to use for a
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given project area, overridding any other version selection mechanism.
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To turn this feature on, simply create the file <em>scram_version</em>
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in your project development/release configuration directory. The file should
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contain the required SCRAM version tag. Any scram command issued in that area
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is then directed to the correct version if it is installed.
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If the required version is not installed then a warning is issued and
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execution of the command continues within the current version.
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<p>
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<td align=left>
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<a href=mailto:Shaun.Ashby@cern.ch
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>Shaun Ashby</a>
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</td>
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