output.R

#!/usr/bin/env Rscript
# |  (C) 2006-2023 Potsdam Institute for Climate Impact Research (PIK)
# |  authors, and contributors see CITATION.cff file. This file is part
# |  of REMIND and licensed under AGPL-3.0-or-later. Under Section 7 of
# |  AGPL-3.0, you are granted additional permissions described in the
# |  REMIND License Exception, version 1.0 (see LICENSE file).
# |  Contact: remind@pik-potsdam.de
##########################################################
#### REMIND Output Generation ####
##########################################################
# Version 1.0
# Type "Rscript output.R" to start the script in the command line

# Based on the Version 2.2 of same file in the MAgPIE main folder
#########################################################################################

# Write dump file when error occurs, see help to dump.frames for more information
options(error = quote({
  dump.frames(to.file = TRUE)
  traceback()
  q()
}))

helpText <- "
#' Rscript output.R [options]
#'
#' [options] can be the following flags:
#'
#'   --help, -h:      show this help text and exit
#'   --test, -t:      tests output.R without actually starting any run
#'   --renv=<path>    load the renv located at <path>, incompatible with --update
#'   --update         update packages in renv first, incompatible with --renv=<path>
#'
#' [options] can also specify the following variables. If they are not specified
#' but needed, the scripts will ask the user.
#'
#'   comp=             comp=single means output for single runs (reporting, …)
#'                     comp=comparison means scripts to compare runs (compareScenarios2, …)
#'                     comp=export means scripts to export runs (xlsx_IIASA, …)
#'   filename_prefix=  string to be added to filenames by some output scripts
#'                     (compareScenarios, xlsx_IIASA)
#'   output=           output=compareScenarios2 directly selects the specific script
#'   outputdir=        Can be used to specify the output directories to be used.
#'                     Example: outputdir=./output/SSP2-Base-rem-1,./output/NDC-rem-1
#'   remind_dir=       path to remind or output folder(s) where runs can be found.
#'                     Defaults to ./output but can also be used to specify multiple
#'                     folders, comma-separated, such as remind_dir=.,../otherremind
#'   slurmConfig=      use slurmConfig=priority, short or standby to specify slurm
#'                     selection. You may also pass complicated arguments such as
#'                     slurmConfig='--qos=priority --mem=16000'
"

argv <- get0("argv", ifnotfound = commandArgs(trailingOnly = TRUE))

# run updates before loading any packages
if ("--update" %in% argv) {
  stopifnot(`--update must not be used together with --renv=...` = !any(startsWith(argv, "--renv=")))
  installedUpdates <- piamenv::updateRenv()
  piamenv::stopIfLoaded(names(installedUpdates))
} else if (any(startsWith(argv, "--renv="))) {
  renvProject <- normalizePath(sub("^--renv=", "", grep("^--renv=", argv, value = TRUE)))
  renv::load(renvProject)
}

# load landuse library
library(lucode2)
library(gms)
require(stringr, quietly = TRUE)

# Import all functions from the scripts/start folder
invisible(sapply(list.files("scripts/start", pattern = "\\.R$", full.names = TRUE), source))

flags <- NULL
### Define arguments that can be read from command line
if (!exists("source_include")) {
  # if this script is not being sourced by another script but called from the command line via Rscript read the command
  # line arguments and let the user choose the slurm options
  flags <- readArgs("outputdir", "output", "comp", "remind_dir", "slurmConfig", "filename_prefix",
                    .flags = c(t = "--test", h = "--help"))
}

if ("--help" %in% flags) {
  message(gsub("#' ?", '', helpText))
  q()
}

choose_slurmConfig_output <- function(output) {
  slurm_options <- c("--qos=priority", "--qos=short", "--qos=standby",
                     "--qos=priority --mem=16000", "--qos=short --mem=16000",
                     "--qos=standby --mem=16000", "--qos=priority --mem=32000")

  if (!isSlurmAvailable())
    return("direct")

  # Modify slurm options for ar6 reporting, since we want to run MAGICC in parallel and we'll need a lot of memory
  if ("ar6Climate" %in% output) slurm_options <- paste(slurm_options[1:3], "--tasks-per-node=12 --mem=32000")
  # reporting.R, in particular remind2::convGDX2MIF, requires at least --mem=8000 of memory
  if ("reporting" %in% output) slurm_options <- grep("--mem=[0-9]*[0-9]{3}", slurm_options, value = TRUE)

  if (length(slurm_options) == 1) {
    return(slurm_options[[1]])
  }
  identifier <- chooseFromList(gsub("qos=", "", gsub("--", "", slurm_options)), multiple = FALSE, returnBoolean = TRUE,
                               type = "slurm mode", userinfo = "Uses the first option if empty.")
  return(if (any(identifier)) slurm_options[as.numeric(which(identifier))] else slurm_options[1])
}

choose_filename_prefix <- function(modules, title = "") {
  cat(paste0("\n\n ", title, "Please choose a prefix for filenames of ", paste(modules, collapse=", "), ".\n"))
  cat(" For example compareScenarios2 uses it for the filenames: compScen-yourprefix-2022-….pdf.\n Use only A-Za-z0-9_-, or leave empty:\n\n")
  filename_prefix <- gms::getLine()
  if(grepl("[^A-Za-z0-9_-]", filename_prefix)) {
    filename_prefix <- choose_filename_prefix(modules, title = paste("No, this contained special characters, try again.\n",title))
  }
  return(filename_prefix)
}

if (exists("source_include")) {
  comp <- "single"
} else if (! exists("comp")) {
  modes <- c("single" = "Output for single run", "comparison" = "Comparison across runs", "export" = "Export", "exit" = "Exit")
  comp <- names(modes)[which(chooseFromList(unname(modes), type = "output mode", multiple = FALSE, returnBoolean = TRUE))]
  if (comp == "exit") q()
}
if (isFALSE(comp)) comp <- "single" # legacy from times only two comp modes existed
if (isTRUE(comp)) comp <- "comparison"

if (! exists("output")) {
  modules <- gsub("\\.R$", "", grep("\\.R$", list.files(paste0("./scripts/output/", if (isFALSE(comp)) "single" else comp)), value = TRUE))
  output <- chooseFromList(modules, type = "modules to be used for output generation", addAllPattern = FALSE)
}

# Select output directories if not defined by readArgs
if (! exists("outputdir")) {
  modulesNeedingMif <- c("compareScenarios2", "xlsx_IIASA", "policyCosts", "Ariadne_output",
                         "plot_compare_iterations", "varListHtml", "fixOnRef")
  needingMif <- any(modulesNeedingMif %in% output)
  if (exists("remind_dir")) {
    dir_folder <- c(file.path(remind_dir, "output"), remind_dir)
  } else {
    defaultcfg <- readDefaultConfig(".")
    dir_folder <- unique(c("output", dirname(defaultcfg$results_folder)))
  }
  dirs <- dirname(Sys.glob(file.path(dir_folder, "*", "fulldata.gdx")))
  if (needingMif) dirs <- intersect(dirs, unique(dirname(Sys.glob(file.path(dir_folder, "*", "REMIND_generic_*.mif")))))
  dirnames <- if (length(dir_folder) == 1) basename(dirs) else dirs
  names(dirnames) <- stringr::str_extract(dirnames, "rem-[0-9]+$")
  names(dirnames)[is.na(names(dirnames))] <- ""
  if (length(dirnames) == 0) {
    stop("No directories found containing gdx", if (needingMif) " and mif", " files. Aborting.")
  }
  selectedDirs <- chooseFromList(dirnames, type = "runs to be used for output generation",
                    userinfo = paste0(if ("policyCosts" %in% output) "The reference run will be selected separately! " else NULL,
                                      if (needingMif) "Do you miss a run? Check if .mif exists and rerun reporting. " else NULL),
                    returnBoolean = FALSE, multiple = TRUE)
  outputdirs <- if (length(dir_folder) == 1) file.path(dir_folder, selectedDirs) else selectedDirs

  if ("policyCosts" %in% output) {
    policyrun <- chooseFromList(dirnames, type = "reference run to which policy run will be compared",
                                userinfo = "Select a single reference run.",
                                returnBoolean = TRUE, multiple = FALSE)
    outputdirs <- c(rbind(outputdirs, dirs[policyrun])) # generate 3,1,4,1,5,1 out of 3,4,5 and policyrun 1
  }
} else {
  outputdirs <- outputdir
}

if (comp %in% c("comparison", "export")) {
  # ask for filename_prefix, if one of the modules that use it is selected
  modules_using_filename_prefix <- c("compareScenarios2", "xlsx_IIASA", "varListHtml")
  if (!exists("filename_prefix")) {
    if (any(modules_using_filename_prefix %in% output)) {
      filename_prefix <- choose_filename_prefix(modules = intersect(modules_using_filename_prefix, output))
    } else {
      filename_prefix <- ""
    }
  }

  # choose the slurm options. If you use command line arguments, use slurmConfig=priority or standby
  modules_using_slurmConfig <- c("compareScenarios2")
  if (!exists("slurmConfig") && any(modules_using_slurmConfig %in% output)) {
    slurmConfig <- choose_slurmConfig_output(output = output)
  }
  if (exists("slurmConfig")) {
    if (slurmConfig %in% c("priority", "short", "standby")) {
      slurmConfig <- paste0("--qos=", slurmConfig)
    }
  }

  # Set value source_include so that loaded scripts know, that they are
  # included as source (instead of a load from command line)
  source_include <- TRUE

  # Execute output scripts over all chosen folders
  for (rout in output) {
    name <- paste(rout, ".R", sep = "")
    if (file.exists(paste0("scripts/output/", comp, "/", name))) {
      if ("--test" %in% flags) {
        message("Test mode, not executing ", paste0("scripts/output/", comp, "/", name))
      } else {
        message(paste("Executing", name))
        tmp.env <- new.env()
        tmp.error <- try(sys.source(paste0("scripts/output/", comp, "/", name), envir = tmp.env))
        rm(tmp.env)
        gc()
        if (!is.null(tmp.error)) {
          warning("Script ", name, " was stopped by an error and not executed properly!")
        }
      }
    }
  }
} else { # comp = single
    # define slurm class or direct execution
  outputInteractive <- c("plotIterations", "fixOnRef", "integratedDamageCosts")
  if (! exists("source_include")) {
    if (any(output %in% outputInteractive)) {
      slurmConfig <- "direct"
      flags <- c(flags, "--interactive") # to tell scripts they can run in interactive mode
    }
    # if this script is not being sourced by another script but called from the command line via Rscript let the user
    # choose the slurm options
    if (!exists("slurmConfig")) {
      slurmConfig <- choose_slurmConfig_output(output = output)
      if (slurmConfig != "direct") slurmConfig <- combine_slurmConfig("--nodes=1 --tasks-per-node=1", slurmConfig)
    }
    if (slurmConfig %in% c("priority", "short", "standby")) {
      slurmConfig <- paste0("--qos=", slurmConfig, " --nodes=1 --tasks-per-node=1")
    }
  } else {
    # if being sourced by another script execute the output scripts directly without sending them to the cluster
    slurmConfig <- "direct"
  }

  # Execute outputscripts for all choosen folders
  for (outputdir in outputdirs) {

    if (exists("cfg")) {
      title <- cfg$title
      gms <- cfg$gms
      revision <- cfg$inputRevision
      magpie_folder <- cfg$magpie_folder
    }

    # Get values of config if output.R is called standalone
    if (!exists("source_include")) {
      magpie_folder <- getwd()
      message("Load data from ", file.path(outputdir, "config.Rdata"))
      if (file.exists(file.path(outputdir, "config.Rdata"))) {
        load(file.path(outputdir, "config.Rdata"))
        title <- cfg$title
        gms <- cfg$gms
        revision <- cfg$inputRevision
      } else {
        config <- grep("\\.cfg$", list.files(outputdir), value = TRUE)
        l <- readLines(file.path(outputdir, config))
        title <- strsplit(grep("(cfg\\$|)title +<-", l, value = TRUE), "\"")[[1]][2]
        gms <- list()
        gms$scenarios <- strsplit(grep("(cfg\\$|)gms\\$scenarios +<-", l, value = TRUE), "\"")[[1]][2]
        revision <- as.numeric(unlist(strsplit(grep("(cfg\\$|)inputRevision +<-", l, value = TRUE), "<-[ \t]*"))[2])
      }
    }

    # Set value source_include so that loaded scripts know, that they are
    # included as source (instead of a load from command line)
    source_include <- TRUE

    ###################################################################################
    # Execute R scripts
    ###################################################################################

    # output creation for --testOneRegi was switched off in start.R in this commit:
    # https://github.com/remindmodel/remind/commit/5905d9dd814b4e4a62738d282bf1815e6029c965
    if (all(is.na(output)) || output == "NA") {
      message("\nNo output generation, as output was set to NA, as for example for --testOneRegi or --quick.")
    } else {
      message("\nStarting output generation for ", outputdir, "\n")
      name <- paste0(output, ".R")
      if ("--test" %in% flags) {
        message("Test mode, not executing scripts/output/single/", paste(name, collapse = ", "))
      } else if (all(file.exists(paste0("scripts/output/single/", name)))) {
        if (slurmConfig == "direct") {
          # execute output script directly (without sending it to slurm)
          for (n in name) {
            message("Executing ", n)
            tmp.env <- new.env()
            tmp.error <- try(sys.source(paste0("scripts/output/single/", n), envir = tmp.env))
            #        rm(list=ls(tmp.env),envir=tmp.env)
            rm(tmp.env)
            gc()
            if (!is.null(tmp.error)) {
              warning("Script ", n, " was stopped by an error and not executed properly!")
            }
          }
        } else {
          # send the output script to slurm
          logfile <- file.path(outputdir, "log_output.txt")
          Rscripts <- paste0("Rscript scripts/output/single/", name, " outputdir=", outputdir, collapse = "; ")
          slurmcmd <- paste0("sbatch ", slurmConfig, " --job-name=", logfile, " --output=", logfile,
                       " --mail-type=END --comment=output.R --wrap='", Rscripts, "'")
          message("Sending to slurm: ", paste(name, collapse = ", "), ". Find log in ", logfile)
          system(slurmcmd)
        }
        # finished
        message("\nFinished ", ifelse(slurmConfig == "direct", "", "starting job for "), "output generation for ", outputdir, "!\n")
      } else {
        warning("Skipping ", outputdir, " because some output script selected could not be found ",
                "in scripts/output/single: ", name[! name %in% dir("scripts/output/single")])
      }
    }

    rm(source_include)
    if (!is.null(warnings())) {
      print(warnings())
    }
  }
}