/// Read registry string.
/// This also supports a means to look for high-versioned keys by use
/// of a $VERSION placeholder in the key path.
/// $VERSION in the key path is a placeholder for the version number,
/// causing the highest value path to be searched for and used.
/// I.e. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\$VERSION".
/// There can be additional characters in the component. Only the numeric
/// characters are compared.
static bool GetSystemRegistryString(string keyPath, string valueName,
ICollection <ToolchainVersion> entries, RegistryView view)
{
string subKey;
var hive = GetRegistryHive(keyPath, out subKey);
var rootKey = RegistryKey.OpenBaseKey(hive, view);
var versionPosition = subKey.IndexOf("\\$VERSION", StringComparison.Ordinal);
if (versionPosition <= 0)
{
return(false);
}
// If we have a $VERSION placeholder, do the highest-version search.
var partialKey = subKey.Substring(0, versionPosition);
using (var key = rootKey.OpenSubKey(partialKey, writable: false))
{
if (key == null)
{
return(false);
}
foreach (var subKeyName in key.GetSubKeyNames())
{
// Get the number version from the key.
var match = Regex.Match(subKeyName, @"[1-9][0-9]*\.?[0-9]*");
if (!match.Success)
{
continue;
}
var versionText = match.Groups[0].Value;
float version;
float.TryParse(versionText, NumberStyles.Number,
CultureInfo.InvariantCulture, out version);
using (var versionKey = key.OpenSubKey(subKeyName))
{
// Check that the key has a value passed by the caller.
var keyValue = versionKey.GetValue(valueName);
if (keyValue == null)
{
continue; // Skip this version since it's invalid.
}
var entry = new ToolchainVersion
{
Version = version,
Directory = keyValue.ToString()
};
entries.Add(entry);
}
}
}
return(true);
}
/// Read registry string.
/// This also supports a means to look for high-versioned keys by use
/// of a $VERSION placeholder in the key path.
/// $VERSION in the key path is a placeholder for the version number,
/// causing the highest value path to be searched for and used.
/// I.e. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\$VERSION".
/// There can be additional characters in the component. Only the numeric
/// characters are compared.
static bool GetSystemRegistryString(string keyPath, string valueName,
ICollection<ToolchainVersion> entries, RegistryView view)
{
string subKey;
var hive = GetRegistryHive(keyPath, out subKey);
var rootKey = RegistryKey.OpenBaseKey(hive, view);
var versionPosition = subKey.IndexOf("\\$VERSION", StringComparison.Ordinal);
if (versionPosition <= 0)
return false;
// If we have a $VERSION placeholder, do the highest-version search.
var partialKey = subKey.Substring(0, versionPosition);
using (var key = rootKey.OpenSubKey(partialKey, writable: false))
{
if (key == null)
return false;
foreach (var subKeyName in key.GetSubKeyNames())
{
// Get the number version from the key.
var match = Regex.Match(subKeyName, @"[1-9][0-9]*\.?[0-9]*");
if (!match.Success)
continue;
var versionText = match.Groups[0].Value;
float version;
float.TryParse(versionText, NumberStyles.Number,
CultureInfo.InvariantCulture, out version);
using (var versionKey = key.OpenSubKey(subKeyName))
{
// Check that the key has a value passed by the caller.
var keyValue = versionKey.GetValue(valueName);
if (keyValue == null)
continue; // Skip this version since it's invalid.
var entry = new ToolchainVersion
{
Version = version,
Directory = keyValue.ToString()
};
entries.Add(entry);
}
}
}
return true;
}