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using System;
using LibGit2Sharp.Core;
namespace LibGit2Sharp
{
/// <summary>
/// Provides helper overloads to a <see cref="Configuration"/>.
/// </summary>
public static class ConfigurationExtensions
{
/// <summary>
/// Get a configuration value for the given key parts.
/// <para>
/// For example in order to get the value for this in a .git\config file:
///
/// <code>
/// [core]
/// bare = true
/// </code>
///
/// You would call:
///
/// <code>
/// bool isBare = repo.Config.Get<bool>(new []{ "core", "bare" }).Value;
/// </code>
/// </para>
/// </summary>
/// <typeparam name="T">The configuration value type</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="keyParts">The key parts</param>
/// <returns>The <see cref="ConfigurationEntry{T}"/>, or null if not set</returns>
public static ConfigurationEntry<T> Get<T>(this Configuration config, string[] keyParts)
{
Ensure.ArgumentNotNull(keyParts, "keyParts");
return config.Get<T>(string.Join(".", keyParts));
}
/// <summary>
/// Get a configuration value for the given key parts.
/// <para>
/// For example in order to get the value for this in a .git\config file:
///
/// <code>
/// [difftool "kdiff3"]
/// path = c:/Program Files/KDiff3/kdiff3.exe
/// </code>
///
/// You would call:
///
/// <code>
/// string where = repo.Config.Get<string>("difftool", "kdiff3", "path").Value;
/// </code>
/// </para>
/// </summary>
/// <typeparam name="T">The configuration value type</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="firstKeyPart">The first key part</param>
/// <param name="secondKeyPart">The second key part</param>
/// <param name="thirdKeyPart">The third key part</param>
/// <returns>The <see cref="ConfigurationEntry{T}"/>, or null if not set</returns>
public static ConfigurationEntry<T> Get<T>(this Configuration config, string firstKeyPart, string secondKeyPart, string thirdKeyPart)
{
Ensure.ArgumentNotNullOrEmptyString(firstKeyPart, "firstKeyPart");
Ensure.ArgumentNotNullOrEmptyString(secondKeyPart, "secondKeyPart");
Ensure.ArgumentNotNullOrEmptyString(thirdKeyPart, "thirdKeyPart");
return config.Get<T>(new[] { firstKeyPart, secondKeyPart, thirdKeyPart });
}
/// <summary>
/// Get a configuration value for the given key.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key</param>
/// <returns>The configuration value, or the default value for the selected <see typeparamref="T"/>if not found</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key)
{
return ValueOrDefault(config.Get<T>(key), default(T));
}
/// <summary>
/// Get a configuration value for the given key,
/// or <paramref name="defaultValue" /> if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key</param>
/// <param name="defaultValue">The default value if the key is not set.</param>
/// <returns>The configuration value, or the default value</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key, T defaultValue)
{
return ValueOrDefault(config.Get<T>(key), defaultValue);
}
/// <summary>
/// Get a configuration value for the given key
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key.</param>
/// <param name="level">The configuration file into which the key should be searched for.</param>
/// <returns>The configuration value, or the default value for <see typeparamref="T"/> if not found</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key, ConfigurationLevel level)
{
return ValueOrDefault(config.Get<T>(key, level), default(T));
}
/// <summary>
/// Get a configuration value for the given key,
/// or <paramref name="defaultValue" /> if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key.</param>
/// <param name="level">The configuration file into which the key should be searched for.</param>
/// <param name="defaultValue">The selector used to generate a default value if the key is not set.</param>
/// <returns>The configuration value, or the default value.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key, ConfigurationLevel level, T defaultValue)
{
return ValueOrDefault(config.Get<T>(key, level), defaultValue);
}
/// <summary>
/// Get a configuration value for the given key parts
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="keyParts">The key parts.</param>
/// <returns>The configuration value, or the default value for<see typeparamref="T"/> if not found</returns>
public static T GetValueOrDefault<T>(this Configuration config, string[] keyParts)
{
return ValueOrDefault(config.Get<T>(keyParts), default(T));
}
/// <summary>
/// Get a configuration value for the given key parts,
/// or <paramref name="defaultValue" /> if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="keyParts">The key parts.</param>
/// <param name="defaultValue">The default value if the key is not set.</param>
/// <returns>The configuration value, or the default value.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string[] keyParts, T defaultValue)
{
return ValueOrDefault(config.Get<T>(keyParts), defaultValue);
}
/// <summary>
/// Get a configuration value for the given key parts.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="firstKeyPart">The first key part.</param>
/// <param name="secondKeyPart">The second key part.</param>
/// <param name="thirdKeyPart">The third key part.</param>
/// <returns>The configuration value, or the default value for the selected <see typeparamref="T"/> if not found</returns>
public static T GetValueOrDefault<T>(this Configuration config, string firstKeyPart, string secondKeyPart, string thirdKeyPart)
{
return ValueOrDefault(config.Get<T>(firstKeyPart, secondKeyPart, thirdKeyPart), default(T));
}
/// <summary>
/// Get a configuration value for the given key parts,
/// or <paramref name="defaultValue" /> if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="firstKeyPart">The first key part.</param>
/// <param name="secondKeyPart">The second key part.</param>
/// <param name="thirdKeyPart">The third key part.</param>
/// <param name="defaultValue">The default value if the key is not set.</param>
/// <returns>The configuration value, or the default.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string firstKeyPart, string secondKeyPart, string thirdKeyPart, T defaultValue)
{
return ValueOrDefault(config.Get<T>(firstKeyPart, secondKeyPart, thirdKeyPart), defaultValue);
}
/// <summary>
/// Get a configuration value for the given key,
/// or a value generated by <paramref name="defaultValueSelector" />
/// if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key</param>
/// <param name="defaultValueSelector">The selector used to generate a default value if the key is not set.</param>
/// <returns>The configuration value, or a generated default.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key, Func<T> defaultValueSelector)
{
return ValueOrDefault(config.Get<T>(key), defaultValueSelector);
}
/// <summary>
/// Get a configuration value for the given key,
/// or a value generated by <paramref name="defaultValueSelector" />
/// if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="key">The key.</param>
/// <param name="level">The configuration file into which the key should be searched for.</param>
/// <param name="defaultValueSelector">The selector used to generate a default value if the key is not set.</param>
/// <returns>The configuration value, or a generated default.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string key, ConfigurationLevel level, Func<T> defaultValueSelector)
{
return ValueOrDefault(config.Get<T>(key, level), defaultValueSelector);
}
/// <summary>
/// Get a configuration value for the given key parts,
/// or a value generated by <paramref name="defaultValueSelector" />
/// if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="keyParts">The key parts.</param>
/// <param name="defaultValueSelector">The selector used to generate a default value if the key is not set.</param>
/// <returns>The configuration value, or a generated default.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string[] keyParts, Func<T> defaultValueSelector)
{
return ValueOrDefault(config.Get<T>(keyParts), defaultValueSelector);
}
/// <summary>
/// Get a configuration value for the given key parts,
/// or a value generated by <paramref name="defaultValueSelector" />
/// if the key is not set.
/// </summary>
/// <typeparam name="T">The configuration value type.</typeparam>
/// <param name="config">The configuration being worked with.</param>
/// <param name="firstKeyPart">The first key part.</param>
/// <param name="secondKeyPart">The second key part.</param>
/// <param name="thirdKeyPart">The third key part.</param>
/// <param name="defaultValueSelector">The selector used to generate a default value if the key is not set.</param>
/// <returns>The configuration value, or a generated default.</returns>
public static T GetValueOrDefault<T>(this Configuration config, string firstKeyPart, string secondKeyPart, string thirdKeyPart, Func<T> defaultValueSelector)
{
return ValueOrDefault(config.Get<T>(firstKeyPart, secondKeyPart, thirdKeyPart), defaultValueSelector);
}
private static T ValueOrDefault<T>(ConfigurationEntry<T> value, T defaultValue)
{
return value == null ? defaultValue : value.Value;
}
private static T ValueOrDefault<T>(ConfigurationEntry<T> value, Func<T> defaultValueSelector)
{
Ensure.ArgumentNotNull(defaultValueSelector, "defaultValueSelector");
return value == null
? defaultValueSelector()
: value.Value;
}
}
}
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