Tarball downloads a tarball from a URL and extracts it into the provided directory.

WithApp specifies an app, by directory name, to build from testdata.

WithBuildpackInfo sets the buildpack info in Context.

appendVendoringFlags checks for and appends vendored dependency flags to the command.

arHostname returns the Artifact Registry hostname for a given region, handling both GDU and TPC.

build implements the /bin/build phase of the buildpack.

cleanUpImage attempts to delete an image from the Docker daemon.

detect implements the /bin/detect phase of the buildpack.

hash creates a sha256 hash from the given cache options.

mockReadGoVersion mocks the readGoVersion

prepareDependenciesLayer is a helper function that handles the common logic for preparing a dependency layer. It checks for empty requirements, manage

* @param {object} pkg package.json contents * @param {string} [entry] entry name or import path * @param {object} [options] * @param {boolean} [opt

* @param {object} pkg package.json contents * @param {string} [entry] entry name or import path * @param {object} [options] * @param {boolean} [opt

resolvePackageVersion returns the newest available version of an NPM package that satisfies the provided version constraint.

CheckCacheExpiration clears the m2 layer and sets a new expiry timestamp when the cache is past expiration.

CheckOrClearCache checks whether cached dependencies exist and match. If they do not match, the layer is cleared and the layer metadata is updated wit

CheckVulnerabilities checks for known vulnerable dependencies.

DetermineBuildCommands returns a list of "npm run" commands to be executed during the build and a bool representing whether this is a "custom build" (

File downloads a file from a URL and writes it to the provided path.

HasDevDependencies returns true if the given directory contains a package.json file that lists more one or more devDependencies.

HasScript returns true if the given package.json file defines a script with the given name.

IsDevMode indicates that the builder is running in Development mode.

IsExactSemver returns true if a given string is valid semantic version.

IsFlutter returns true if the given Dart project contains a pubspec.yaml that declares a dependency on flutter.

IsUVPyproject checks if the application is a UV Pyproject application.

IsWritable returns true if the file at the path constructed by joining elem is writable by the owner

JSON fetches a JSON payload from a URL and unmarshals it into the value pointed to by v.

MvnCmd returns the command that should be used to invoke maven for this build.

NPMInstallCommand returns the correct install command based on the version of Node.js. By default we prefer "npm ci" because it handles transitive dep

NewExecCmd constructs an command executor that can replace standard exec.Cmd calls with custom behavior for testing. It takes a series of mock command

OptOut is used during the detect phase to opt out of the build process.

ParsePomFile unmarshals the provided pom.xml into a MavenProject.

PhpConfiguration returns the PHP configuration in runtime_config for GAE Flexible

ReadComposerJSON returns the deserialized composer.json from the given dir. Empty dir uses the current working directory.

ResolveVersion finds the largest version in a list of semantic versions that satisfies the provided constraint. If no version in the list satisfies th

RuntimeVersion validate and returns the customer requested Python version by inspecting the environment variables and .python-version file.

ShouldTestVersion returns true if the current test run's version is included in the constraint parameter. An empty inclusion constraint is treated as

SkipPruningDevSync returns true if dev sync is enabled, or if dev sync status cannot be determined.

Span emits a structured Stackdriver span.

WithEnv sets environment variables (of the form "KEY=value").

WithStderr configures what a mocked command prints to stderr.

doGet performs an HTTP GET request for a URL.