private void GiveErrorForMissingFramework()
{
var missingFrameworkErrorString = IsLockFileProjectJsonBased(ProjectLockFile) ?
nameof(Strings.MissingFrameworkInProjectJson) :
nameof(Strings.MissingFrameworkInProjectFile);
ThrowExceptionIfNotAllowingFallback(missingFrameworkErrorString, TargetMonikers.First().ItemSpec);
}
/// <summary>
/// Fetches the right target from the targets section in a lock file, or attempts to find a "best match" if allowed. The "best match" logic
/// is there to allow a design time build for the IDE to generally work even if something isn't quite right. Throws an exception
/// if either the preferred isn't there and fallbacks aren't allowed, or fallbacks are allowed but nothing at all could be found.
/// </summary>
/// <param name="lockFile">The lock file JSON.</param>
/// <param name="needsRuntimeIdentifier">Whether we must find targets that include the runtime identifier or one without the runtime identifier.</param>
private JObject GetTargetOrAttemptFallback(JObject lockFile, bool needsRuntimeIdentifier)
{
var targets = (JObject)lockFile["targets"];
foreach (var preferredTargetMoniker in TargetMonikers)
{
var preferredTargetMonikerWithOptionalRuntimeIdentifier = GetTargetMonikerWithOptionalRuntimeIdentifier(preferredTargetMoniker, needsRuntimeIdentifier);
var target = (JObject)targets[preferredTargetMonikerWithOptionalRuntimeIdentifier];
if (target != null)
{
return target;
}
}
// If we need a runtime identifier, let's see if we have the framework targeted. If we do,
// then we can give a better error message.
bool onlyNeedsRuntimeInProjectJson = false;
if (needsRuntimeIdentifier)
{
foreach (var targetMoniker in TargetMonikers)
{
var targetMonikerWithoutRuntimeIdentifier = GetTargetMonikerWithOptionalRuntimeIdentifier(targetMoniker, needsRuntimeIdentifier: false);
if (targets[targetMonikerWithoutRuntimeIdentifier] != null)
{
// We do have a TXM being targeted, so we just are missing the runtime
onlyNeedsRuntimeInProjectJson = true;
break;
}
}
}
if (onlyNeedsRuntimeInProjectJson)
{
GiveErrorForMissingRuntimeIdentifier();
}
else
{
ThrowExceptionIfNotAllowingFallback(nameof(Strings.MissingFramework), TargetMonikers.First().ItemSpec);
}
// If we're still here, that means we're allowing fallback, so let's try
foreach (var fallback in TargetMonikers)
{
var target = (JObject)targets[GetTargetMonikerWithOptionalRuntimeIdentifier(fallback, needsRuntimeIdentifier: false)];
if (target != null)
{
return target;
}
}
// Anything goes
var enumerableTargets = targets.Cast<KeyValuePair<string, JToken>>();
var firstTarget = (JObject)enumerableTargets.FirstOrDefault().Value;
if (firstTarget == null)
{
throw new ExceptionFromResource(nameof(Strings.NoTargetsInLockFile));
}
return firstTarget;
}
/// <summary>
/// Fetches the right target from the targets section in a lock file, or attempts to find a "best match" if allowed. The "best match" logic
/// is there to allow a design time build for the IDE to generally work even if something isn't quite right. Throws an exception
/// if either the preferred isn't there and fallbacks aren't allowed, or fallbacks are allowed but nothing at all could be found.
/// </summary>
/// <param name="lockFile">The lock file JSON.</param>
/// <param name="needsRuntimeIdentifier">Whether we must find targets that include the runtime identifier or one without the runtime identifier.</param>
private JObject GetTargetOrAttemptFallback(JObject lockFile, bool needsRuntimeIdentifier)
{
var targets = (JObject)lockFile["targets"];
foreach (var preferredTargetMoniker in TargetMonikers)
{
var preferredTargetMonikerWithOptionalRuntimeIdentifier = GetTargetMonikerWithOptionalRuntimeIdentifier(preferredTargetMoniker, needsRuntimeIdentifier);
var target = (JObject)targets[preferredTargetMonikerWithOptionalRuntimeIdentifier];
if (target != null)
{
return(target);
}
}
var preferredForErrorMessages = GetTargetMonikerWithOptionalRuntimeIdentifier(TargetMonikers.First(), needsRuntimeIdentifier);
if (!AllowFallbackOnTargetSelection)
{
// If we're not falling back then abort the build
throw new ExceptionFromResource("MissingEntryInLockFile", preferredForErrorMessages);
}
// We are allowing fallback, so we'll still give a warning but allow us to continue
// In production ResolveNuGetPackageAssets, this call is LogWarningFromResources.
// In our current use in dotnet\buildtools, we rely on the fallback behavior, so we just log
// this as a message.
Log.LogMessageFromResources("MissingEntryInLockFile", preferredForErrorMessages);
foreach (var fallback in TargetMonikers)
{
var target = (JObject)targets[GetTargetMonikerWithOptionalRuntimeIdentifier(fallback, needsRuntimeIdentifier: false)];
if (target != null)
{
return(target);
}
}
// Anything goes
var enumerableTargets = targets.Cast <KeyValuePair <string, JToken> >();
var firstTarget = (JObject)enumerableTargets.FirstOrDefault().Value;
if (firstTarget == null)
{
throw new ExceptionFromResource("NoTargetsInLockFile");
}
return(firstTarget);
}