Honor $(prefix) set in config.mak* when defining ETC_GIT*
[git/dscho.git] / trace.c
blob35d388dce44a4a8e3d6053dfd6abcb652771818a
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
5 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
6 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
7 * Copyright (C) 2006 Mike McCormack
8 * Copyright (C) 2006 Christian Couder
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "cache.h"
26 #include "quote.h"
28 /* Get a trace file descriptor from GIT_TRACE env variable. */
29 static int get_trace_fd(int *need_close)
31 char *trace = getenv("GIT_TRACE");
33 if (!trace || !strcmp(trace, "") ||
34 !strcmp(trace, "0") || !strcasecmp(trace, "false"))
35 return 0;
36 if (!strcmp(trace, "1") || !strcasecmp(trace, "true"))
37 return STDERR_FILENO;
38 if (strlen(trace) == 1 && isdigit(*trace))
39 return atoi(trace);
40 if (is_absolute_path(trace)) {
41 int fd = open(trace, O_WRONLY | O_APPEND | O_CREAT, 0666);
42 if (fd == -1) {
43 fprintf(stderr,
44 "Could not open '%s' for tracing: %s\n"
45 "Defaulting to tracing on stderr...\n",
46 trace, strerror(errno));
47 return STDERR_FILENO;
49 *need_close = 1;
50 return fd;
53 fprintf(stderr, "What does '%s' for GIT_TRACE mean?\n", trace);
54 fprintf(stderr, "If you want to trace into a file, "
55 "then please set GIT_TRACE to an absolute pathname "
56 "(starting with /).\n");
57 fprintf(stderr, "Defaulting to tracing on stderr...\n");
59 return STDERR_FILENO;
62 static const char err_msg[] = "Could not trace into fd given by "
63 "GIT_TRACE environment variable";
65 void trace_printf(const char *fmt, ...)
67 struct strbuf buf;
68 va_list ap;
69 int fd, len, need_close = 0;
71 fd = get_trace_fd(&need_close);
72 if (!fd)
73 return;
75 set_try_to_free_routine(NULL); /* is never reset */
76 strbuf_init(&buf, 64);
77 va_start(ap, fmt);
78 len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
79 va_end(ap);
80 if (len >= strbuf_avail(&buf)) {
81 strbuf_grow(&buf, len - strbuf_avail(&buf) + 128);
82 va_start(ap, fmt);
83 len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
84 va_end(ap);
85 if (len >= strbuf_avail(&buf))
86 die("broken vsnprintf");
88 strbuf_setlen(&buf, len);
90 write_or_whine_pipe(fd, buf.buf, buf.len, err_msg);
91 strbuf_release(&buf);
93 if (need_close)
94 close(fd);
97 void trace_argv_printf(const char **argv, const char *fmt, ...)
99 struct strbuf buf;
100 va_list ap;
101 int fd, len, need_close = 0;
103 fd = get_trace_fd(&need_close);
104 if (!fd)
105 return;
107 set_try_to_free_routine(NULL); /* is never reset */
108 strbuf_init(&buf, 64);
109 va_start(ap, fmt);
110 len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
111 va_end(ap);
112 if (len >= strbuf_avail(&buf)) {
113 strbuf_grow(&buf, len - strbuf_avail(&buf) + 128);
114 va_start(ap, fmt);
115 len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
116 va_end(ap);
117 if (len >= strbuf_avail(&buf))
118 die("broken vsnprintf");
120 strbuf_setlen(&buf, len);
122 sq_quote_argv(&buf, argv, 0);
123 strbuf_addch(&buf, '\n');
124 write_or_whine_pipe(fd, buf.buf, buf.len, err_msg);
125 strbuf_release(&buf);
127 if (need_close)
128 close(fd);
131 static const char *quote_crnl(const char *path)
133 static char new_path[PATH_MAX];
134 const char *p2 = path;
135 char *p1 = new_path;
137 if (!path)
138 return NULL;
140 while (*p2) {
141 switch (*p2) {
142 case '\\': *p1++ = '\\'; *p1++ = '\\'; break;
143 case '\n': *p1++ = '\\'; *p1++ = 'n'; break;
144 case '\r': *p1++ = '\\'; *p1++ = 'r'; break;
145 default:
146 *p1++ = *p2;
148 p2++;
150 *p1 = '\0';
151 return new_path;
154 /* FIXME: move prefix to startup_info struct and get rid of this arg */
155 void trace_repo_setup(const char *prefix)
157 const char *git_work_tree;
158 char cwd[PATH_MAX];
159 char *trace = getenv("GIT_TRACE");
161 if (!trace || !strcmp(trace, "") ||
162 !strcmp(trace, "0") || !strcasecmp(trace, "false"))
163 return;
165 if (!getcwd(cwd, PATH_MAX))
166 die("Unable to get current working directory");
168 if (!(git_work_tree = get_git_work_tree()))
169 git_work_tree = "(null)";
171 if (!prefix)
172 prefix = "(null)";
174 trace_printf("setup: git_dir: %s\n", quote_crnl(get_git_dir()));
175 trace_printf("setup: worktree: %s\n", quote_crnl(git_work_tree));
176 trace_printf("setup: cwd: %s\n", quote_crnl(cwd));
177 trace_printf("setup: prefix: %s\n", quote_crnl(prefix));