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# Runs a generic MLflow command through the command-line interface.
#
# @param ... The parameters to pass to the command line.
# @param background Should this command be triggered as a background task?
# Defaults to \code{FALSE}.
# @param echo Print the standard output and error to the screen? Defaults to
# \code{TRUE}, does not apply to background tasks.
# @param stderr_callback \code{NULL} (the default), or a function to call for
# every chunk of the standard error, passed to \code{\link[=processx:run]{processx::run()}}.
# @param client Mlflow client to provide environment for the cli process.
#
# @return A \code{processx} task.
#' @importFrom processx run
#' @importFrom processx process
#' @importFrom withr with_envvar
mlflow_cli <- function(...,
background = FALSE,
echo = TRUE,
stderr_callback = NULL,
client = mlflow_client()) {
env <- if (is.null(client)) list() else client$get_cli_env()
args <- list(...)
verbose <- mlflow_is_verbose()
python <- dirname(python_bin())
mlflow_bin <- python_mlflow_bin()
env <- modifyList(list(
PATH = paste(python, Sys.getenv("PATH"), sep = ":"),
MLFLOW_TRACKING_URI = mlflow_get_tracking_uri(),
MLFLOW_BIN = mlflow_bin,
MLFLOW_PYTHON_BIN = python_bin()
), env)
MLFLOW_CONDA_HOME <- Sys.getenv("MLFLOW_CONDA_HOME", NA)
if (!is.na(MLFLOW_CONDA_HOME)) {
env$MLFLOW_CONDA_HOME <- MLFLOW_CONDA_HOME
}
with_envvar(env, {
if (background) {
result <- process$new(mlflow_bin, args = unlist(args), echo_cmd = verbose, supervise = TRUE)
} else {
result <- run(mlflow_bin, args = unlist(args), echo = echo, echo_cmd = verbose, stderr_callback = stderr_callback)
}
})
invisible(result)
}
mlflow_cli_file_output <- function(response) {
temp_file <- tempfile(fileext = ".txt")
writeLines(response$stdout, temp_file)
temp_file
}
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