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dd93aa9f50
use the modern version using GSubprocess that already exists in node-parser. Also change from one function to two - so tests can diff GBytes and strings, depending on which they prefer.
147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
/*
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* Copyright © 2021 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <gio/gio.h>
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#ifdef G_OS_WIN32
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#include <io.h>
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#else
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#include <unistd.h>
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#endif
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#include "testsuite/testutils.h"
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/*<private>
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* diff_bytes_with_file:
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* @file1: The filename of the original. This is assumed
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* to be the reference to compare against.
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* @input: some text contained in a `GBytes` that is
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* supposed to match the file's contents
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* @error: A return location for an error if diffing could
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* not happen
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*
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* Diffs generated text with a reference file.
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*
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* If the diffing runs into any error, NULL is returned and
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* `error` is set. If diffing succeeds, the error is not set
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* and NULL is returned if the file was identical to the
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* contents of the file or the actual diff is returned if
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* they were not.
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*
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* Returns: NULL on success or failure, the diff on failure
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*/
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char *
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diff_bytes_with_file (const char *file1,
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GBytes *input,
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GError **error)
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{
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char *diff_cmd, *diff;
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diff = NULL;
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diff_cmd = g_find_program_in_path ("diff");
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if (diff_cmd)
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{
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GSubprocess *process;
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GBytes *output;
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process = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE
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| G_SUBPROCESS_FLAGS_STDOUT_PIPE,
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error,
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diff_cmd, "--strip-trailing-cr", "-u", file1, "-", NULL);
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if (process == NULL)
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return NULL;
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if (!g_subprocess_communicate (process,
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input,
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NULL,
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&output,
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NULL,
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error))
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{
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g_object_unref (process);
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return NULL;
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}
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if (g_subprocess_get_successful (process))
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{
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g_clear_pointer (&output, g_bytes_unref);
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}
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else if (g_subprocess_get_if_exited (process) && g_subprocess_get_exit_status (process) == 1)
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{
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gsize size;
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/* this is the condition when the files differ */
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diff = g_bytes_unref_to_data (output, &size);
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output = NULL;
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}
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else
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{
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g_clear_pointer (&output, g_bytes_unref);
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"The `diff' process exited with error status %d",
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g_subprocess_get_exit_status (process));
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}
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g_object_unref (process);
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}
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else
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{
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char *buf1;
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const char *buf2;
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gsize len1, len2;
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buf2 = g_bytes_get_data (input, &len2);
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if (!g_file_get_contents (file1, &buf1, &len1, error))
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return NULL;
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if ((len2 != len1) ||
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strncmp (buf2, buf1, len1) != 0)
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diff = g_strdup ("Files differ.\n");
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g_free (buf1);
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}
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return diff;
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}
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char *
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diff_string_with_file (const char *file1,
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const char *text,
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gssize len,
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GError **error)
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{
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GBytes *bytes;
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char *result;
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if (len < 0)
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len = strlen (text);
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bytes = g_bytes_new_static (text, len);
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result = diff_bytes_with_file (file1, bytes, error);
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g_bytes_unref (bytes);
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return result;
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}
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