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![Junio C Hamano](/assets/img/avatar_default.png)
The Porcelainish has become so much usable as the UI that there is not much reason people should be using the core programs by hand anymore. At this point we are better off making the behaviour of the core programs predictable by keeping them unaffected by the configuration variables. Otherwise they will become very hard to use as reliable building blocks. For example, "git-commit -a" internally uses git-diff-files to figure out the set of paths that need to be updated in the index, and we should never allow diff.renames that happens to be in the configuration to interfere (or slow down the process). The UI level configuration such as showing renamed diff and coloring are still honored by the Porcelainish ("git log" family and "git diff"), but not by the core anymore. Signed-off-by: Junio C Hamano <junkio@cox.net>
138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "log-tree.h"
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#include "builtin.h"
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static struct rev_info log_tree_opt;
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static int diff_tree_commit_sha1(const unsigned char *sha1)
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{
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struct commit *commit = lookup_commit_reference(sha1);
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if (!commit)
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return -1;
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return log_tree_commit(&log_tree_opt, commit);
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}
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static int diff_tree_stdin(char *line)
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{
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int len = strlen(line);
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unsigned char sha1[20];
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struct commit *commit;
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if (!len || line[len-1] != '\n')
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return -1;
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line[len-1] = 0;
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if (get_sha1_hex(line, sha1))
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return -1;
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commit = lookup_commit(sha1);
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if (!commit || parse_commit(commit))
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return -1;
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if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
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/* Graft the fake parents locally to the commit */
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int pos = 41;
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struct commit_list **pptr, *parents;
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/* Free the real parent list */
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for (parents = commit->parents; parents; ) {
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struct commit_list *tmp = parents->next;
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free(parents);
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parents = tmp;
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}
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commit->parents = NULL;
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pptr = &(commit->parents);
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while (line[pos] && !get_sha1_hex(line + pos, sha1)) {
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struct commit *parent = lookup_commit(sha1);
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if (parent) {
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pptr = &commit_list_insert(parent, pptr)->next;
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}
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pos += 41;
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}
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}
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return log_tree_commit(&log_tree_opt, commit);
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}
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static const char diff_tree_usage[] =
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"git-diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
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"[<common diff options>] <tree-ish> [<tree-ish>] [<path>...]\n"
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" -r diff recursively\n"
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" --root include the initial commit as diff against /dev/null\n"
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COMMON_DIFF_OPTIONS_HELP;
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int cmd_diff_tree(int argc, const char **argv, char **envp)
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{
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int nr_sha1;
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char line[1000];
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struct object *tree1, *tree2;
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static struct rev_info *opt = &log_tree_opt;
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int read_stdin = 0;
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git_config(git_default_config); /* no "diff" UI options */
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nr_sha1 = 0;
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init_revisions(opt);
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opt->abbrev = 0;
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opt->diff = 1;
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argc = setup_revisions(argc, argv, opt, NULL);
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while (--argc > 0) {
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const char *arg = *++argv;
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if (!strcmp(arg, "--stdin")) {
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read_stdin = 1;
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continue;
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}
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usage(diff_tree_usage);
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}
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if (!opt->diffopt.output_format)
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opt->diffopt.output_format = DIFF_FORMAT_RAW;
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/*
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* NOTE! We expect "a ^b" to be equal to "a..b", so we
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* reverse the order of the objects if the second one
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* is marked UNINTERESTING.
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*/
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nr_sha1 = opt->pending.nr;
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switch (nr_sha1) {
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case 0:
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if (!read_stdin)
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usage(diff_tree_usage);
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break;
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case 1:
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tree1 = opt->pending.objects[0].item;
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diff_tree_commit_sha1(tree1->sha1);
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break;
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case 2:
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tree1 = opt->pending.objects[0].item;
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tree2 = opt->pending.objects[1].item;
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if (tree2->flags & UNINTERESTING) {
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struct object *tmp = tree2;
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tree2 = tree1;
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tree1 = tmp;
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}
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diff_tree_sha1(tree1->sha1,
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tree2->sha1,
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"", &opt->diffopt);
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log_tree_diff_flush(opt);
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break;
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}
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if (!read_stdin)
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return 0;
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if (opt->diffopt.detect_rename)
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opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
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DIFF_SETUP_USE_CACHE);
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while (fgets(line, sizeof(line), stdin)) {
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unsigned char sha1[20];
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if (get_sha1_hex(line, sha1)) {
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fputs(line, stdout);
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fflush(stdout);
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}
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else
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diff_tree_stdin(line);
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}
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return 0;
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}
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