apply: fix copy/rename breakage
[git/git.git] / exec_cmd.c
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1#include "cache.h"
2#include "exec_cmd.h"
575ba9d6 3#include "quote.h"
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4#define MAX_ARGS 32
5
6extern char **environ;
384df833 7static const char *argv_exec_path;
77cb17e9 8
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9static const char *builtin_exec_path(void)
10{
6fad004a 11#ifndef __MINGW32__
4ec22a48 12 return GIT_EXEC_PATH;
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13#else
14 int len;
15 char *p, *q, *sl;
16 static char *ep;
17 if (ep)
18 return ep;
19
20 len = strlen(_pgmptr);
21 if (len < 2)
22 return ep = ".";
23
24 p = ep = xmalloc(len+1);
25 q = _pgmptr;
26 sl = NULL;
27 /* copy program name, turn '\\' into '/', skip last part */
28 while ((*p = *q)) {
29 if (*q == '\\' || *q == '/') {
30 *p = '/';
31 sl = p;
32 }
33 p++, q++;
34 }
35 if (sl)
36 *sl = '\0';
37 else
38 ep[0] = '.', ep[1] = '\0';
39 return ep;
40#endif
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41}
42
384df833 43void git_set_argv_exec_path(const char *exec_path)
77cb17e9 44{
384df833 45 argv_exec_path = exec_path;
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46}
47
48
49/* Returns the highest-priority, location to look for git programs. */
962554c6 50const char *git_exec_path(void)
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51{
52 const char *env;
53
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54 if (argv_exec_path)
55 return argv_exec_path;
77cb17e9 56
d4ebc36c 57 env = getenv(EXEC_PATH_ENVIRONMENT);
2b601626 58 if (env && *env) {
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59 return env;
60 }
61
4ec22a48 62 return builtin_exec_path();
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63}
64
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65static void add_path(struct strbuf *out, const char *path)
66{
67 if (path && *path) {
68 if (is_absolute_path(path))
69 strbuf_addstr(out, path);
70 else
71 strbuf_addstr(out, make_absolute_path(path));
72
80ba074f 73 strbuf_addch(out, PATH_SEP);
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74 }
75}
76
77void setup_path(const char *cmd_path)
78{
79 const char *old_path = getenv("PATH");
80 struct strbuf new_path;
81
82 strbuf_init(&new_path, 0);
83
84 add_path(&new_path, argv_exec_path);
85 add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
4ec22a48 86 add_path(&new_path, builtin_exec_path());
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87 add_path(&new_path, cmd_path);
88
89 if (old_path)
90 strbuf_addstr(&new_path, old_path);
91 else
92 strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
93
94 setenv("PATH", new_path.buf, 1);
95
96 strbuf_release(&new_path);
97}
77cb17e9 98
9201c707 99int execv_git_cmd(const char **argv)
77cb17e9 100{
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101 int argc;
102 const char **nargv;
77cb17e9 103
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104 for (argc = 0; argv[argc]; argc++)
105 ; /* just counting */
106 nargv = xmalloc(sizeof(*nargv) * (argc + 2));
77cb17e9 107
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108 nargv[0] = "git";
109 for (argc = 0; argv[argc]; argc++)
110 nargv[argc + 1] = argv[argc];
111 nargv[argc + 1] = NULL;
112 trace_argv_printf(nargv, "trace: exec:");
575ba9d6 113
511707d4 114 /* execvp() can only ever return if it fails */
7550be0a 115 execvp("git", (char **)nargv);
77cb17e9 116
511707d4 117 trace_printf("trace: exec failed: %s\n", strerror(errno));
575ba9d6 118
7550be0a 119 free(nargv);
511707d4 120 return -1;
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121}
122
123
9201c707 124int execl_git_cmd(const char *cmd,...)
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125{
126 int argc;
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127 const char *argv[MAX_ARGS + 1];
128 const char *arg;
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129 va_list param;
130
131 va_start(param, cmd);
132 argv[0] = cmd;
133 argc = 1;
134 while (argc < MAX_ARGS) {
135 arg = argv[argc++] = va_arg(param, char *);
136 if (!arg)
137 break;
138 }
139 va_end(param);
140 if (MAX_ARGS <= argc)
141 return error("too many args to run %s", cmd);
142
143 argv[argc] = NULL;
144 return execv_git_cmd(argv);
145}