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from __future__ import annotations import contextlib import os import shlex import shutil import tempfile import textwrap from typing import Generator from typing import Sequence from pre_commit import lang_base from pre_commit.envcontext import envcontext from pre_commit.envcontext import PatchesT from pre_commit.envcontext import UNSET from pre_commit.prefix import Prefix from pre_commit.util import cmd_output_b from pre_commit.util import win_exe ENVIRONMENT_DIR = 'renv' RSCRIPT_OPTS = ('--no-save', '--no-restore', '--no-site-file', '--no-environ') get_default_version = lang_base.basic_get_default_version health_check = lang_base.basic_health_check @contextlib.contextmanager def _r_code_in_tempfile(code: str) -> Generator[str, None, None]: """ To avoid quoting and escaping issues, avoid `Rscript [options] -e {expr}` but use `Rscript [options] path/to/file_with_expr.R` """ with tempfile.TemporaryDirectory() as tmpdir: fname = os.path.join(tmpdir, 'script.R') with open(fname, 'w') as f: f.write(_inline_r_setup(textwrap.dedent(code))) yield fname def get_env_patch(venv: str) -> PatchesT: return ( ('R_PROFILE_USER', os.path.join(venv, 'activate.R')), ('RENV_PROJECT', UNSET), ) @contextlib.contextmanager def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]: envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version) with envcontext(get_env_patch(envdir)): yield def _prefix_if_file_entry( entry: list[str], prefix: Prefix, *, is_local: bool, ) -> Sequence[str]: if entry[1] == '-e' or is_local: return entry[1:] else: return (prefix.path(entry[1]),) def _rscript_exec() -> str: r_home = os.environ.get('R_HOME') if r_home is None: return 'Rscript' else: return os.path.join(r_home, 'bin', win_exe('Rscript')) def _entry_validate(entry: list[str]) -> None: """ Allowed entries: # Rscript -e expr # Rscript path/to/file """ if entry[0] != 'Rscript': raise ValueError('entry must start with `Rscript`.') if entry[1] == '-e': if len(entry) > 3: raise ValueError('You can supply at most one expression.') elif len(entry) > 2: raise ValueError( 'The only valid syntax is `Rscript -e {expr}`' 'or `Rscript path/to/hook/script`', ) def _cmd_from_hook( prefix: Prefix, entry: str, args: Sequence[str], *, is_local: bool, ) -> tuple[str, ...]: cmd = shlex.split(entry) _entry_validate(cmd) cmd_part = _prefix_if_file_entry(cmd, prefix, is_local=is_local) return (cmd[0], *RSCRIPT_OPTS, *cmd_part, *args) def install_environment( prefix: Prefix, version: str, additional_dependencies: Sequence[str], ) -> None: lang_base.assert_version_default('r', version) env_dir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version) os.makedirs(env_dir, exist_ok=True) shutil.copy(prefix.path('renv.lock'), env_dir) shutil.copytree(prefix.path('renv'), os.path.join(env_dir, 'renv')) r_code_inst_environment = f"""\ prefix_dir <- {prefix.prefix_dir!r} options( repos = c(CRAN = "https://cran.rstudio.com"), renv.consent = TRUE ) source("renv/activate.R") renv::restore() activate_statement <- paste0( 'suppressWarnings({{', 'old <- setwd("', getwd(), '"); ', 'source("renv/activate.R"); ', 'setwd(old); ', 'renv::load("', getwd(), '");}})' ) writeLines(activate_statement, 'activate.R') is_package <- tryCatch( {{ path_desc <- file.path(prefix_dir, 'DESCRIPTION') suppressWarnings(desc <- read.dcf(path_desc)) "Package" %in% colnames(desc) }}, error = function(...) FALSE ) if (is_package) {{ renv::install(prefix_dir) }} """ with _r_code_in_tempfile(r_code_inst_environment) as f: cmd_output_b(_rscript_exec(), '--vanilla', f, cwd=env_dir) if additional_dependencies: r_code_inst_add = 'renv::install(commandArgs(trailingOnly = TRUE))' with in_env(prefix, version): with _r_code_in_tempfile(r_code_inst_add) as f: cmd_output_b( _rscript_exec(), *RSCRIPT_OPTS, f, *additional_dependencies, cwd=env_dir, ) def _inline_r_setup(code: str) -> str: """ Some behaviour of R cannot be configured via env variables, but can only be configured via R options once R has started. These are set here. """ with_option = [ textwrap.dedent("""\ options( install.packages.compile.from.source = "never", pkgType = "binary" ) """), code, ] return '\n'.join(with_option) def run_hook( prefix: Prefix, entry: str, args: Sequence[str], file_args: Sequence[str], *, is_local: bool, require_serial: bool, color: bool, ) -> tuple[int, bytes]: cmd = _cmd_from_hook(prefix, entry, args, is_local=is_local) return lang_base.run_xargs( cmd, file_args, require_serial=require_serial, color=color, )
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