runtime

runtime

runtime is a Starlark module provides Go and app runtime information.

Constants

• hostname: A string representing the hostname of the system where the script is being executed.
• workdir: A string representing the current working directory of the process.
• homedir: A string representing the home directory of the user running the process, it's $HOME on Unix/Linux, %USERPROFILE% on Windows.
• os: A string representing the operating system of the runtime. This value comes from Go's runtime.GOOS.
• arch: A string representing the architecture of the machine. This value is derived from Go's runtime.GOARCH.
• gover: A string representing the Go runtime version. This is obtained using runtime.Version() from the Go standard library.
• pid: An integer representing the process ID of the current process.
• ppid: An integer representing the parent process ID of the current process.
• uid: An integer representing the user ID of the process owner.
• gid: An integer representing the group ID of the process owner.
• app_start: A time value representing the moment when the application started. This is used to calculate uptime.

Functions

uptime()

Returns the uptime of the current process in time.duration.

Examples

basic

Returns the uptime of the current process immediately.

load("runtime", "uptime")
print(uptime())
# Output: 883.583µs

getenv(key, default=None)

Returns the value of the environment variable key as a string if it exists, or default if it doesn't.

Examples

basic

Returns the value of the environment variable PATH if it exists, or None if it doesn't.

load("runtime", "getenv")
print(getenv("PATH"))
# Output: /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

putenv(key, value)

Sets the value of the environment variable named by the key, returning an error if any.

Examples

basic

Sets the environment variable STARLET_TEST to the value 123456.

load("runtime", "putenv")
putenv("STARLET_TEST", 123456)

setenv(key, value)

Sets the value of the environment variable named by the key, returning an error if any. Alias of putenv.

Examples

basic

Sets the environment variable STARLET_TEST to the value ABC.

load("runtime", "setenv")
setenv("STARLET_TEST", "ABC")

unsetenv(key)

Unsets a single environment variable.

Examples

basic

Unsets the environment variable STARLET_TEST.

load("runtime", "unsetenv")
unsetenv("STARLET_TEST")