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a4b5e91c49
The labels for the three participants in a potential conflict are all optional arguments for the xdiff merge routine; if they are NULL, then xdl_merge() can cope by omitting the labels from its output. Move them to the xmparam structure to allow new callers to save some keystrokes where they are not needed. This also has the virtue of making the xdiff merge interface more similar to merge_trees, which might make it easier to learn. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "xdiff/xdiff.h"
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#include "xdiff-interface.h"
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#include "parse-options.h"
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static const char *const merge_file_usage[] = {
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"git merge-file [options] [-L name1 [-L orig [-L name2]]] file1 orig_file file2",
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NULL
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};
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static int label_cb(const struct option *opt, const char *arg, int unset)
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{
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static int label_count = 0;
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const char **names = (const char **)opt->value;
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if (label_count >= 3)
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return error("too many labels on the command line");
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names[label_count++] = arg;
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return 0;
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}
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int cmd_merge_file(int argc, const char **argv, const char *prefix)
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{
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const char *names[3] = { NULL, NULL, NULL };
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mmfile_t mmfs[3];
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mmbuffer_t result = {NULL, 0};
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xmparam_t xmp = {{XDF_NEED_MINIMAL}};
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int ret = 0, i = 0, to_stdout = 0;
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int quiet = 0;
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int nongit;
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struct option options[] = {
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OPT_BOOLEAN('p', "stdout", &to_stdout, "send results to standard output"),
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OPT_SET_INT(0, "diff3", &xmp.style, "use a diff3 based merge", XDL_MERGE_DIFF3),
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OPT_SET_INT(0, "ours", &xmp.favor, "for conflicts, use our version",
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XDL_MERGE_FAVOR_OURS),
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OPT_SET_INT(0, "theirs", &xmp.favor, "for conflicts, use their version",
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XDL_MERGE_FAVOR_THEIRS),
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OPT_SET_INT(0, "union", &xmp.favor, "for conflicts, use a union version",
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XDL_MERGE_FAVOR_UNION),
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OPT_INTEGER(0, "marker-size", &xmp.marker_size,
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"for conflicts, use this marker size"),
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OPT__QUIET(&quiet),
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OPT_CALLBACK('L', NULL, names, "name",
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"set labels for file1/orig_file/file2", &label_cb),
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OPT_END(),
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};
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xmp.level = XDL_MERGE_ZEALOUS_ALNUM;
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xmp.style = 0;
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xmp.favor = 0;
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prefix = setup_git_directory_gently(&nongit);
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if (!nongit) {
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/* Read the configuration file */
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git_config(git_xmerge_config, NULL);
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if (0 <= git_xmerge_style)
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xmp.style = git_xmerge_style;
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}
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argc = parse_options(argc, argv, prefix, options, merge_file_usage, 0);
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if (argc != 3)
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usage_with_options(merge_file_usage, options);
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if (quiet) {
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if (!freopen("/dev/null", "w", stderr))
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return error("failed to redirect stderr to /dev/null: "
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"%s\n", strerror(errno));
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}
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for (i = 0; i < 3; i++) {
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if (!names[i])
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names[i] = argv[i];
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if (read_mmfile(mmfs + i, argv[i]))
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return -1;
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if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
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return error("Cannot merge binary files: %s\n",
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argv[i]);
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}
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xmp.file1 = names[0];
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xmp.file2 = names[2];
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ret = xdl_merge(mmfs + 1, mmfs + 0, mmfs + 2, &xmp, &result);
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for (i = 0; i < 3; i++)
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free(mmfs[i].ptr);
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if (ret >= 0) {
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const char *filename = argv[0];
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FILE *f = to_stdout ? stdout : fopen(filename, "wb");
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if (!f)
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ret = error("Could not open %s for writing", filename);
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else if (result.size &&
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fwrite(result.ptr, result.size, 1, f) != 1)
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ret = error("Could not write to %s", filename);
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else if (fclose(f))
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ret = error("Could not close %s", filename);
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free(result.ptr);
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}
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return ret;
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}
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