md5_check: Check md5 checksums

In RHReynolds/rutils: Common utility functions

Check md5 checksums

Description

This function allows users to (i) generate md5 checksums on files that have been copied/download/transferred and (ii) check that these match with md5 checksums generated on the original files.

Usage

md5_check(file_paths, original_md5, column_to_join_by)

Arguments

file_paths	a data.frame or tibble object with the following two columns: file_path: full file path for files for which md5s should be generated file_name: file name, which should match the file name in the original_md5 dataframe.
original_md5	a data.frame or tibble object, with md5 checksums from the original files. Should include two columns: file_name: file name original_md5: md5 checksum
column_to_join_by	character() vector, indicating the name of the column in the dataframe supplied to the argument original_md5, which will be used to join original and transfer md5 dataframes.

Value

a tibble object with the following columns:

• file_path: full file path for files for which md5s were generated

• file_name: file name

• original_md5: original md5 checksum

• new_md5: generated md5 checksum

• same_md5: contains values TRUE/FALSE; FALSE if md5 checksums do not match, and TRUE if they match.

Examples

file_path <-
    system.file(
        "testdata",
        package = "rutils",
        mustWork = TRUE
    )

original_md5 <-
    readr::read_delim(
        file.path(file_path, "md5_test_data.txt"),
        delim = "\t"
    )

file_paths <-
    tibble::tibble(
        file_path =
            list.files(
                file_path,
                pattern = "over.chain",
                full.names = TRUE
            )
    ) %>%
    dplyr::mutate(
        file_name = basename(file_path)
    )

md5_df <-
    md5_check(
        file_paths = file_paths,
        original_md5 = original_md5,
        column_to_join_by = "file_name"
    )

md5_df

print("All check sums match between files?")

all(md5_df$same_md5)

RHReynolds/rutils documentation built on March 26, 2022, 8:17 a.m.