test-graph.c

   1 /* Copyright (c) 2006-2013 Jonas Fonseca <fonseca@diku.dk>
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License as
   5  * published by the Free Software Foundation; either version 2 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include "tig.h"
  15 #include "io.h"
  16 #include "graph.h"
  17
  18 #define USAGE \
  19 "test-graph [--ascii]\n" \
  20 "\n" \
  21 "Example usage:\n" \
  22 "       # git log --pretty=raw --parents | ./test-graph\n" \
  23 "       # git log --pretty=raw --parents | ./test-graph --ascii"
  24
  25 static void TIG_NORETURN
  26 die(const char *err, ...)
  27 {
  28         va_list args;
  29
  30         endwin();
  31
  32         va_start(args, err);
  33         fputs("test-graph: ", stderr);
  34         vfprintf(stderr, err, args);
  35         fputs("\n", stderr);
  36         va_end(args);
  37
  38         exit(1);
  39 }
  40
  41 struct commit {
  42         char id[SIZEOF_REV];
  43         struct graph_canvas canvas;
  44 };
  45
  46 DEFINE_ALLOCATOR(realloc_commits, struct commit *, 8)
  47
  48 int
  49 main(int argc, const char *argv[])
  50 {
  51         struct graph graph = { };
  52         struct io io = { };
  53         char *line;
  54         struct commit **commits = NULL;
  55         size_t ncommits = 0;
  56         struct commit *commit = NULL;
  57         bool is_boundary;
  58         const char *(*graph_fn)(struct graph_symbol *) = graph_symbol_to_utf8;
  59
  60         if (argc > 1 && !strcmp(argv[1], "--ascii"))
  61                 graph_fn = graph_symbol_to_ascii;
  62
  63         if (isatty(STDIN_FILENO)) {
  64                 die(USAGE);
  65         }
  66
  67         if (!io_open(&io, "%s", ""))
  68                 die("IO");
  69
  70         while (!io_eof(&io)) {
  71                 bool can_read = io_can_read(&io, TRUE);
  72
  73                 for (; (line = io_get(&io, '\n', can_read)); can_read = FALSE) {
  74                         if (!prefixcmp(line, "commit ")) {
  75                                 line += STRING_SIZE("commit ");
  76                                 is_boundary = *line == '-';
  77
  78                                 if (is_boundary)
  79                                         line++;
  80
  81                                 if (!realloc_commits(&commits, ncommits, 1))
  82                                         die("Commits");
  83
  84                                 commit = calloc(1, sizeof(*commit));
  85                                 if (!commit)
  86                                         die("Commit");
  87                                 commits[ncommits++] = commit;
  88                                 string_copy_rev(commit->id, line);
  89                                 graph_add_commit(&graph, &commit->canvas, commit->id, line, is_boundary);
  90                                 graph_render_parents(&graph);
  91
  92                         } else if (!prefixcmp(line, "    ")) {
  93                                 int i;
  94
  95                                 if (!commit)
  96                                         continue;
  97
  98                                 for (i = 0; i < commit->canvas.size; i++) {
  99                                         struct graph_symbol *symbol = &commit->canvas.symbols[i];
 100                                         const char *chars = graph_fn(symbol);
 101
 102                                         printf("%s", chars + (i == 0));
 103                                 }
 104                                 printf("%s\n", line + 3);
 105
 106                                 commit = NULL;
 107                         }
 108                 }
 109         }
 110
 111         return 0;
 112 }
 113
 114 /* vim: set ts=8 sw=8 noexpandtab: */