Exit causes the buildpack to exit with the given exit code and message.

GetEnvVar returns the environment variable with the provided key, and whether it was found in the provided AppHostingSchema.

GetFloatDP returns the FloatDP with MetricID m, or creates it

NodeEnv returns the value of NODE_ENV or `production`.

OptIn is used during the detect phase to opt in to the build process.

OptOutTargetPlatformNotGAE returns a DetectResult for when a buildpack is opting out because the value for 'X_GOOGLE_TARGET_PLATFORM' is not 'gae'. Th

Processes returns the list of processes added by buildpacks.

ReadDir is a pass through for ioutil.ReadDir(...) and returns any error with proper user / system attribution

RuntimeVersion returns the runtime version for the go app.

Version tries to get the concrete package version used based on lock file.

* @param {string} name The package name * @param {string} entry The target entry, eg "." * @param {number} [condition] Unmatched condition?

* @param {string} name The package name * @param {string} entry The target entry, eg "." * @param {number} [condition] Unmatched condition?

AssertFrameworkInjectionAllowed returns an error if framework injection is disabled.

BuildpackName returns the buildpack name.

EntrypointIfExists returns entrypoint from GAE app.yaml if it exists.

ExecutableJar looks for the jar with a Main-Class manifest. If there is not exactly 1 of these jars, throw an error.

FindManifestValueFromJar returns a manifest entry value from a JAR if found, or empty otherwise.

GetURL makes an HTTP GET request to given URL and writes the body to the provided writer.

HasApphostingPackageBuild returns true if the given package.json file includes a "apphosting:build" script.

HasAtLeastOne walks through file tree searching for at least one match.

IsPyprojectEnabled checks if the pyproject feature is enabled.

ProjectFiles finds all project files supported by dotnet.

ResolveToolVersion resolves a pinned version based on language, runtime, stack, and toolName from tooling_versions.json.

Version returns the installed version of Python.

VersionMatches checks if the installed version of Go and the version specified in go.mod match the given version range. The range string has the follo

WithBuildPlans adds build plans to the detect result.

WithEnvs specifies env vars to set for the buildpack test.

WithExecMocks mocks the behavior of shell commands.

CopyFile copies a file from src to dest

DependencyVersion returns the version of the given dependency in the given package.json file.

DevSyncEntrypoint returns the entrypoint command for dev sync mode.

ExecWithGoproxyFallback runs the given command with a GOPROXY fallback. Before Go 1.14, Go would fall back to direct only if a 404 or 410 error ocurre

GenerateErrorID creates a short hash from the provided parts.

GenerateNPMConfig generates an .npmrc file in the user's HOME directory with the credentials necessary for NPM to make authenticated requests to Artif

HasAtLeastOneOutsideDependencyDirectories walks through file tree searching for at least one match while ignoring dependency-only directories.

IsTPC returns true if the build universe is set and is not GDU.

OptInTargetPlatformGAE returns a DetectResult for when a buildpack is opting in because of a 'gae' value for 'X_GOOGLE_TARGET_PLATFORM'. The 'gae' val

OverrideAppHostingBuildScript overrides the "apphosting:build" script in package.json with the build command from the preprocessed apphosting.yaml.

ResolveVersion returns the newest available version of a runtime that satisfies the provided version constraint.