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Explanation
The code performs a type check of the Kubernetes source code across various platforms.
Key Functions and Components:
verify(plat string, patterns []string, ignore map[string]bool)
: This function is the core of the typechecking process.- It takes a platform string, a list of Go packages to type check, and a map of ignored package paths.
- It creates a
packages.Config
object with the specified platform, build flags, and other settings. - It uses
packages.Load
to load the specified packages and their dependencies. - It iterates through the loaded packages and checks for type errors.
- It prints the results to the console (error messages, definitions/uses, timings, etc.)
accumulate(pkg *packages.Package, allMap map[string]*packages.Package)
: This helper function recursively collects all packages and their dependencies, building a map of all the packages involved.dedup(errors []packages.Error)
: This function removes duplicate error messages from a slice ofpackages.Error
.serialFprintf(w io.Writer, format string, a ...interface{})
: This function provides a thread-safe way to print to the console.resolvePkgs(patterns ...string)
: This function resolves a list of package patterns and returns a map of resolved package paths.
Execution Flow:
- Command-line arguments parsing: The
main
function parses command-line arguments, including options for platform selection, verbose logging, parallel execution, and others. - Initialization: It sets up a list of cross-platform configurations (
crossPlatforms
) and resolves a list of ignored packages based on theignorePatterns
flag. - Parallel Type Checking:
- The code uses a
sync.WaitGroup
to manage concurrent type checking tasks. - It uses a channel (
throttle
) to limit the number of concurrent tasks based on theparallel
flag. - For each platform in
plats
, it launches a goroutine that calls theverify
function to type check the specified packages on that platform. - The goroutines check for type errors and print results to the console.
- Error Handling:
- Each goroutine sets a
failed
flag if it encounters any errors. - After all goroutines are done, the main function checks the
failed
flag and exits with a non-zero status code if any errors occurred.
Key Observations:
- The code uses the
golang.org/x/tools/go/packages
package to perform type checking. - It handles various build flags and options, including build tags, CGO_ENABLED, GOOS, GOARCH, and others.
- It provides options for specifying platforms and ignoring specific packages.
- It employs parallel execution to speed up the type checking process.
This code is a comprehensive and well-designed type checker for Kubernetes. It provides valuable features for ensuring code correctness across various platforms and environments.
Graph
The graph shows the usage of functions within the codebase.
Select a code symbol to view it's graph