org.microbean.helm.chart.repository

Class ChartRepository

java.lang.Object

org.microbean.helm.chart.resolver.AbstractChartResolver

org.microbean.helm.chart.repository.ChartRepository

@Experimental
public class ChartRepository
extends AbstractChartResolver

An AbstractChartResolver that resolves Helm charts from a given Helm chart repository.

Author:

Laird Nelson

See Also:

resolve(String, String)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ChartRepository.Index A class representing certain of the contents of a Helm chart repository's index.yaml file.

Constructor Summary

Constructors

Constructor and Description
ChartRepository(String name, URI uri) Creates a new ChartRepository whose cached index path will be a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml.
ChartRepository(String name, URI uri, boolean reifyHelmHomeIfNecessary) Creates a new ChartRepository whose cached index path will be a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml.
ChartRepository(String name, URI uri, Path cachedIndexPath) Creates a new ChartRepository.
ChartRepository(String name, URI uri, Path cachedIndexPath, boolean reifyHelmHomeIfNecessary) Creates a new ChartRepository.
ChartRepository(String name, URI uri, Path archiveCacheDirectory, Path indexCacheDirectory, Path cachedIndexPath) Creates a new ChartRepository.
ChartRepository(String name, URI uri, Path archiveCacheDirectory, Path indexCacheDirectory, Path cachedIndexPath, boolean reifyHelmHomeIfNecessary) Creates a new ChartRepository.
ChartRepository(String name, URI uri, Path archiveCacheDirectory, Path indexCacheDirectory, Path cachedIndexPath, boolean reifyHelmHomeIfNecessary, Proxy proxy) Creates a new ChartRepository.
ChartRepository(String name, URI uri, Path archiveCacheDirectory, Path indexCacheDirectory, Path cachedIndexPath, Proxy proxy) Creates a new ChartRepository.

Method Summary

Modifier and Type	Method and Description
ChartRepository.Index	clearIndex() Clears the ChartRepository.Index stored internally by this ChartRepository, paving the way for a fresh copy to be installed by the getIndex(boolean) method, and returns the old value.
Path	downloadIndex() Invokes the downloadIndexTo(Path, CopyOption...) method with the return value of the getCachedIndexPath() method as its first parameter value, and StandardCopyOption.REPLACE_EXISTING as its second parameter value.
@Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path	downloadIndex(CopyOption... copyOptions) Invokes the downloadIndexTo(Path, CopyOption...) method with the return value of the getCachedIndexPath() method.
Path	downloadIndexTo(Path path) Downloads a copy of the chart repository's index.yaml file to the Path specified and returns the canonical representation of the Path to which the file was actually downloaded.
@Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path	downloadIndexTo(Path path, CopyOption... copyOptions) Downloads a copy of the chart repository's index.yaml file to the Path specified and returns the canonical representation of the Path to which the file was actually downloaded.
Path	getCachedChartPath(String chartName, String chartVersion) Given a Helm chart name and its version, returns the local Path, representing a local copy of the Helm chart as downloaded from the chart repository represented by this ChartRepository, downloading the archive if necessary, and replacing any prior copy that may exist.
@Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path	getCachedChartPath(String chartName, String chartVersion, CopyOption... copyOptions) Given a Helm chart name and its version, returns the local Path, representing a local copy of the Helm chart as downloaded from the chart repository represented by this ChartRepository, downloading the archive if necessary.
Path	getCachedIndexPath() Returns a non-null, absolute Path to the file that contains or will contain a copy of the chart repository's index.yaml file.
ChartRepository.Index	getIndex() Returns the ChartRepository.Index for this ChartRepository.
ChartRepository.Index	getIndex(boolean forceDownload) Returns the ChartRepository.Index for this ChartRepository.
@Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") ChartRepository.Index	getIndex(boolean forceDownload, CopyOption... copyOptions) Returns the ChartRepository.Index for this ChartRepository.
String	getName() Returns the name of this ChartRepository.
URI	getUri() Returns the URI of the root of this ChartRepository.
boolean	isCachedIndexExpired() Returns true if the cached copy of the index.yaml file is to be considered stale.
ChartRepository.Index	loadIndex() Creates a new ChartRepository.Index from the contents of the cached copy of the chart repository's index.yaml file and returns it.
protected InputStream	openStream(URL url) Returns an InputStream corresponding to the supplied URL.
ChartOuterClass.Chart.Builder	resolve(String chartName, String chartVersion) Uses the supplied chartName and chartVersion parameters to find an appropriate Helm chart and returns it in the form of a Chart.Builder object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChartRepository

public ChartRepository(String name,
                       URI uri)

Creates a new ChartRepository whose cached index path will be a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the absolute URI to the root of this ChartRepository; must not be null

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       boolean reifyHelmHomeIfNecessary)

Creates a new ChartRepository whose cached index path will be a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the absolute URI to the root of this ChartRepository; must not be null

reifyHelmHomeIfNecessary - if true and, for whatever reason, the local Helm home directory structure needs to be partially or entirely created, then this constructor will attempt to reify it

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path cachedIndexPath)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path cachedIndexPath,
                       boolean reifyHelmHomeIfNecessary)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

reifyHelmHomeIfNecessary - if true and, for whatever reason, the local Helm home directory structure needs to be partially or entirely created, then this constructor will attempt to reify it

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path archiveCacheDirectory,
                       Path indexCacheDirectory,
                       Path cachedIndexPath)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

archiveCacheDirectory - an absolute Path representing a directory where Helm chart archives may be stored; if null then a Path beginning with the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, appended with cache/archive will be used instead

indexCacheDirectory - an absolute Path representing a directory that the supplied cachedIndexPath parameter value will be considered to be relative to; will be ignored and hence may be null if the supplied cachedIndexPath parameter value is absolute

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory, or if archiveCacheDirectory is non-null and either empty or not Path.isAbsolute()

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path archiveCacheDirectory,
                       Path indexCacheDirectory,
                       Path cachedIndexPath,
                       boolean reifyHelmHomeIfNecessary)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

archiveCacheDirectory - an absolute Path representing a directory where Helm chart archives may be stored; if null then a Path beginning with the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, appended with cache/archive will be used instead

indexCacheDirectory - an absolute Path representing a directory that the supplied cachedIndexPath parameter value will be considered to be relative to; will be ignored and hence may be null if the supplied cachedIndexPath parameter value is absolute

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

reifyHelmHomeIfNecessary - if true and, for whatever reason, the local Helm home directory structure needs to be partially or entirely created, then this constructor will attempt to reify it

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory and/or it could not be reified, or if archiveCacheDirectory is non-null and either empty or not Path.isAbsolute()

See Also:

ChartRepository(String, URI, Path, Path, Path, boolean, Proxy), getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path archiveCacheDirectory,
                       Path indexCacheDirectory,
                       Path cachedIndexPath,
                       Proxy proxy)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

archiveCacheDirectory - an absolute Path representing a directory where Helm chart archives may be stored; if null then a Path beginning with the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, appended with cache/archive will be used instead

indexCacheDirectory - an absolute Path representing a directory that the supplied cachedIndexPath parameter value will be considered to be relative to; will be ignored and hence may be null if the supplied cachedIndexPath parameter value Path.isAbsolute()

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

proxy - a Proxy representing a proxy server used to establish a connection to the chart repository represented by this ChartRepository; may be null in which case Proxy.NO_PROXY will be used instead

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory

See Also:

getName(), getUri(), getCachedIndexPath()

ChartRepository

public ChartRepository(String name,
                       URI uri,
                       Path archiveCacheDirectory,
                       Path indexCacheDirectory,
                       Path cachedIndexPath,
                       boolean reifyHelmHomeIfNecessary,
                       Proxy proxy)

Creates a new ChartRepository.

Parameters:

name - the name of this ChartRepository; must not be null

uri - the URI to the root of this ChartRepository; must not be null

archiveCacheDirectory - an absolute Path representing a directory where Helm chart archives may be stored; if null then a Path beginning with the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, appended with cache/archive will be used instead

indexCacheDirectory - an absolute Path representing a directory that the supplied cachedIndexPath parameter value will be considered to be relative to; will be ignored and hence may be null if the supplied cachedIndexPath parameter value Path.isAbsolute()

cachedIndexPath - a Path naming the file that will store a copy of the chart repository's index.yaml file; if null then a Path relative to the absolute directory represented by the value of the helm.home system property, or the value of the HELM_HOME environment variable, and bearing a name consisting of the supplied name suffixed with -index.yaml will be used instead

reifyHelmHomeIfNecessary - if true and, for whatever reason, the local Helm home directory structure needs to be partially or entirely created, then this constructor will attempt to reify it

proxy - a Proxy representing a proxy server used to establish a connection to the chart repository represented by this ChartRepository; may be null in which case Proxy.NO_PROXY will be used instead

Throws:

NullPointerException - if either name or uri is null

IllegalArgumentException - if uri is not absolute, or if there is no existing "Helm home" directory and/or it could not be reified

See Also:

getName(), getUri(), getCachedIndexPath()

Method Detail

getName

public final String getName()

Returns the name of this ChartRepository.

This method never returns null.

Returns:

the non-null name of this ChartRepository

getUri

public final URI getUri()

Returns the URI of the root of this ChartRepository.

This method never returns null.

The URI returned by this method is guaranteed to be absolute.

Returns:

the non-null, absolute URI of the root of this ChartRepository

getCachedIndexPath

public final Path getCachedIndexPath()

Returns a non-null, absolute Path to the file that contains or will contain a copy of the chart repository's index.yaml file.

This method never returns null.

Returns:

a non-null, absolute Path to the file that contains or will contain a copy of the chart repository's index.yaml file

getIndex

public final ChartRepository.Index getIndex()
                                     throws IOException,
                                            URISyntaxException

Returns the ChartRepository.Index for this ChartRepository.

This method never returns null.

If this method has not been invoked before on this ChartRepository, then the cached copy of the chart repository's index.yaml file is parsed into an ChartRepository.Index and that ChartRepository.Index is stored in an instance variable before it is returned.

If no cached copy of the chart repository's index.yaml file exists, then one is downloaded first.

return the ChartRepository.Index representing the contents of this ChartRepository; never null

Throws:

IOException - if there was a problem either parsing an index.yaml file or downloading it

URISyntaxException - if one of the URIs in the index.yaml file is invalid

See Also:

getIndex(boolean, CopyOption...), downloadIndex()

getIndex

public final ChartRepository.Index getIndex(boolean forceDownload)
                                     throws IOException,
                                            URISyntaxException

Returns the ChartRepository.Index for this ChartRepository.

This method never returns null.

If this method has not been invoked before on this ChartRepository, then the cached copy of the chart repository's index.yaml file is parsed into an ChartRepository.Index and that ChartRepository.Index is stored in an instance variable before it is returned.

If the cached copy of the chart repository's index.yaml file has expired, then one is downloaded first.

Parameters:

forceDownload - if true then no caching will happen

Returns:

the ChartRepository.Index representing the contents of this ChartRepository; never null

Throws:

IOException - if there was a problem either parsing an index.yaml file or downloading it

URISyntaxException - if one of the URIs in the index.yaml file is invalid

See Also:

getIndex(boolean, CopyOption...), downloadIndexTo(Path, CopyOption...), isCachedIndexExpired()

getIndex

@Issue(id="156",
       uri="https://github.com/microbean/microbean-helm/issues/156")
public final @Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") ChartRepository.Index getIndex(boolean forceDownload,
                                                                                                                                                                                                                CopyOption... copyOptions)
                                                                                                                                                                                                         throws IOException,
                                                                                                                                                                                                                URISyntaxException

Returns the ChartRepository.Index for this ChartRepository.

This method never returns null.

If this method has not been invoked before on this ChartRepository, then the cached copy of the chart repository's index.yaml file is parsed into an ChartRepository.Index and that ChartRepository.Index is stored in an instance variable before it is returned.

If the cached copy of the chart repository's index.yaml file has expired, then one is downloaded first.

Parameters:

forceDownload - if true then no caching will happen

copyOptions - any CopyOption instances that will be passed to any Files.move(Path, Path, CopyOption...) invocation that may be necessary; may be null

Returns:

the ChartRepository.Index representing the contents of this ChartRepository; never null

Throws:

IOException - if there was a problem either parsing an index.yaml file or downloading it

URISyntaxException - if one of the URIs in the index.yaml file is invalid

See Also:

downloadIndexTo(Path, CopyOption...), isCachedIndexExpired()

isCachedIndexExpired

public boolean isCachedIndexExpired()

Returns true if the cached copy of the index.yaml file is to be considered stale.

The default implementation of this method returns the negation of the return value of an invocation of the Files.isRegularFile(Path, LinkOption...) method on the return value of the getCachedIndexPath() method.

Returns:

true if the cached copy of the index.yaml file is to be considered stale; false otherwise

See Also:

getIndex(boolean)

clearIndex

public final ChartRepository.Index clearIndex()

Clears the ChartRepository.Index stored internally by this ChartRepository, paving the way for a fresh copy to be installed by the getIndex(boolean) method, and returns the old value.

This method may return null if #getIndex(boolean) has not yet been called.

Returns:

the ChartRepository.Index, or null

downloadIndex

public final Path downloadIndex()
                         throws IOException

Invokes the downloadIndexTo(Path, CopyOption...) method with the return value of the getCachedIndexPath() method as its first parameter value, and StandardCopyOption.REPLACE_EXISTING as its second parameter value.

This method never returns null.

Returns:

Path the Path to which the index.yaml file was downloaded; never null

Throws:

IOException - if there was a problem downloading

See Also:

downloadIndexTo(Path, CopyOption...)

downloadIndex

@Issue(id="156",
       uri="https://github.com/microbean/microbean-helm/issues/156")
public final @Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path downloadIndex(CopyOption... copyOptions)
                                                                                                                                                                                             throws IOException

Invokes the downloadIndexTo(Path, CopyOption...) method with the return value of the getCachedIndexPath() method.

This method never returns null.

Parameters:

copyOptions - any CopyOption instances that will be passed to any Files.move(Path, Path, CopyOption...) invocations that may be necessary; may be null

Returns:

Path the Path to which the index.yaml file was downloaded; never null

Throws:

IOException - if there was a problem downloading

See Also:

downloadIndexTo(Path, CopyOption...)

downloadIndexTo

public Path downloadIndexTo(Path path)
                     throws IOException

Downloads a copy of the chart repository's index.yaml file to the Path specified and returns the canonical representation of the Path to which the file was actually downloaded.

This method never returns null.

Overrides of this method must not return null.

The default implementation of this method actually downloads the index.yaml file to a temporary file first, and then renames it, replacing any existing file with that name.

Parameters:

path - the Path to download the index.yaml file to; may be null in which case the return value of the getCachedIndexPath() method will be used instead

Returns:

the Path to the file; never null

Throws:

IOException - if there was a problem downloading

See Also:

downloadIndexTo(Path, CopyOption...)

downloadIndexTo

@Issue(id="156",
       uri="https://github.com/microbean/microbean-helm/issues/156")
public @Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path downloadIndexTo(Path path,
                                                                                                                                                                                                CopyOption... copyOptions)
                                                                                                                                                                                         throws IOException

Downloads a copy of the chart repository's index.yaml file to the Path specified and returns the canonical representation of the Path to which the file was actually downloaded.

This method never returns null.

Overrides of this method must not return null.

The default implementation of this method actually downloads the index.yaml file to a temporary file first, and then renames it, replacing any existing file with that name.

Parameters:

path - the Path to download the index.yaml file to; may be null in which case the return value of the getCachedIndexPath() method will be used instead

copyOptions - any CopyOption instances that will be passed to an Files.move(Path, Path, CopyOption...) invocation; may be null

Returns:

the Path to the file; never null

Throws:

IOException - if there was a problem downloading

loadIndex

public ChartRepository.Index loadIndex()
                                throws IOException,
                                       URISyntaxException

Creates a new ChartRepository.Index from the contents of the cached copy of the chart repository's index.yaml file and returns it.

This method never returns null.

Overrides of this method must not return null.

Returns:

a new ChartRepository.Index; never null

Throws:

IOException - if there was a problem reading the file

URISyntaxException - if a URI in the file was invalid

See Also:

ChartRepository.Index.loadFrom(Path)

getCachedChartPath

public final Path getCachedChartPath(String chartName,
                                     String chartVersion)
                              throws IOException,
                                     URISyntaxException

Given a Helm chart name and its version, returns the local Path, representing a local copy of the Helm chart as downloaded from the chart repository represented by this ChartRepository, downloading the archive if necessary, and replacing any prior copy that may exist.

This method may return null.

Parameters:

chartName - the name of the chart whose local Path should be returned; must not be null

chartVersion - the version of the chart to select; may be null in which case "latest" semantics are implied

Returns:

the Path to the chart archive, or null

Throws:

IOException - if there was a problem downloading

URISyntaxException - if this ChartRepository's associated Index could not be parsed

NullPointerException - if chartName is null

See Also:

getCachedChartPath(String, String, CopyOption...)

getCachedChartPath

@Issue(id="156",
       uri="https://github.com/microbean/microbean-helm/issues/156")
public final @Issue(id="156",uri="https://github.com/microbean/microbean-helm/issues/156") Path getCachedChartPath(String chartName,
                                                                                                                                                                                                         String chartVersion,
                                                                                                                                                                                                         CopyOption... copyOptions)
                                                                                                                                                                                                  throws IOException,
                                                                                                                                                                                                         URISyntaxException

Given a Helm chart name and its version, returns the local Path, representing a local copy of the Helm chart as downloaded from the chart repository represented by this ChartRepository, downloading the archive if necessary.

This method may return null.

Parameters:

chartName - the name of the chart whose local Path should be returned; must not be null

chartVersion - the version of the chart to select; may be null in which case "latest" semantics are implied

copyOptions - any CopyOption instances that will be passed to any Files.move(Path, Path, CopyOption...) invocations that may be necessary; may be null

Returns:

the Path to the chart archive, or null

Throws:

IOException - if there was a problem downloading

URISyntaxException - if this ChartRepository's associated Index could not be parsed

NullPointerException - if chartName is null

openStream

protected InputStream openStream(URL url)
                          throws IOException

Returns an InputStream corresponding to the supplied URL.

This method may return null.

Overrides of this method are permitted to return null.

Parameters:

url - the URL whose affiliated InputStream should be returned; may be null in which case null will be returned

Returns:

an InputStream appropriate for the supplied URL, or null

Throws:

IOException - if an error occurs while connecting to the supplied URL

resolve

public ChartOuterClass.Chart.Builder resolve(String chartName,
                                             String chartVersion)
                                      throws ChartResolverException

Uses the supplied chartName and chartVersion parameters to find an appropriate Helm chart and returns it in the form of a Chart.Builder object.

Implementations of this method may return null.

This implementation calls the getCachedChartPath(String, String) method with the supplied arguments and uses a TapeArchiveChartLoader to load the resulting archive into a Chart.Builder object.

Specified by:

resolve in class AbstractChartResolver

Parameters:

chartName - the name of the chart to resolve; must not be null

chartVersion - the version of the chart to resolve; may be null which normally implies "latest" semantics

Returns:

the Chart.Builder representing a suitable Helm chart, or null if no such chart could be found

Throws:

ChartResolverException - if there was a problem with resolution