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Commit | Line | Data |
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77cb17e9 MO |
1 | #include "cache.h" |
2 | #include "exec_cmd.h" | |
575ba9d6 | 3 | #include "quote.h" |
20574f55 | 4 | #include "argv-array.h" |
77cb17e9 MO |
5 | #define MAX_ARGS 32 |
6 | ||
384df833 | 7 | static const char *argv_exec_path; |
e1464ca7 | 8 | static const char *argv0_path; |
77cb17e9 | 9 | |
59362e56 | 10 | char *system_path(const char *path) |
2de9de5e | 11 | { |
35fb0e86 SP |
12 | #ifdef RUNTIME_PREFIX |
13 | static const char *prefix; | |
14 | #else | |
026fa0d5 | 15 | static const char *prefix = PREFIX; |
35fb0e86 | 16 | #endif |
026fa0d5 SP |
17 | struct strbuf d = STRBUF_INIT; |
18 | ||
19 | if (is_absolute_path(path)) | |
59362e56 | 20 | return xstrdup(path); |
026fa0d5 | 21 | |
35fb0e86 SP |
22 | #ifdef RUNTIME_PREFIX |
23 | assert(argv0_path); | |
24 | assert(is_absolute_path(argv0_path)); | |
25 | ||
024aa7d8 JS |
26 | if (!prefix && |
27 | !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) && | |
28 | !(prefix = strip_path_suffix(argv0_path, BINDIR)) && | |
29 | !(prefix = strip_path_suffix(argv0_path, "git"))) { | |
35fb0e86 | 30 | prefix = PREFIX; |
aa094570 | 31 | trace_printf("RUNTIME_PREFIX requested, " |
35fb0e86 SP |
32 | "but prefix computation failed. " |
33 | "Using static fallback '%s'.\n", prefix); | |
34 | } | |
35 | #endif | |
36 | ||
026fa0d5 | 37 | strbuf_addf(&d, "%s/%s", prefix, path); |
59362e56 | 38 | return strbuf_detach(&d, NULL); |
2de9de5e SP |
39 | } |
40 | ||
4dd47c3b | 41 | const char *git_extract_argv0_path(const char *argv0) |
e1464ca7 | 42 | { |
2cd72b0b SP |
43 | const char *slash; |
44 | ||
45 | if (!argv0 || !*argv0) | |
46 | return NULL; | |
4dd47c3b | 47 | |
f4598233 | 48 | slash = find_last_dir_sep(argv0); |
4dd47c3b | 49 | |
f4598233 | 50 | if (slash) { |
4dd47c3b SH |
51 | argv0_path = xstrndup(argv0, slash - argv0); |
52 | return slash + 1; | |
53 | } | |
54 | ||
55 | return argv0; | |
e1464ca7 JS |
56 | } |
57 | ||
384df833 | 58 | void git_set_argv_exec_path(const char *exec_path) |
77cb17e9 | 59 | { |
384df833 | 60 | argv_exec_path = exec_path; |
c90d565a JS |
61 | /* |
62 | * Propagate this setting to external programs. | |
63 | */ | |
64 | setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1); | |
77cb17e9 MO |
65 | } |
66 | ||
67 | ||
68 | /* Returns the highest-priority, location to look for git programs. */ | |
962554c6 | 69 | const char *git_exec_path(void) |
77cb17e9 MO |
70 | { |
71 | const char *env; | |
72 | ||
384df833 SP |
73 | if (argv_exec_path) |
74 | return argv_exec_path; | |
77cb17e9 | 75 | |
d4ebc36c | 76 | env = getenv(EXEC_PATH_ENVIRONMENT); |
2b601626 | 77 | if (env && *env) { |
77cb17e9 MO |
78 | return env; |
79 | } | |
80 | ||
49fa65a7 | 81 | return system_path(GIT_EXEC_PATH); |
77cb17e9 MO |
82 | } |
83 | ||
511707d4 SP |
84 | static void add_path(struct strbuf *out, const char *path) |
85 | { | |
86 | if (path && *path) { | |
9610decf | 87 | strbuf_add_absolute_path(out, path); |
80ba074f | 88 | strbuf_addch(out, PATH_SEP); |
511707d4 SP |
89 | } |
90 | } | |
91 | ||
e1464ca7 | 92 | void setup_path(void) |
511707d4 SP |
93 | { |
94 | const char *old_path = getenv("PATH"); | |
f285a2d7 | 95 | struct strbuf new_path = STRBUF_INIT; |
511707d4 | 96 | |
8e346283 | 97 | add_path(&new_path, git_exec_path()); |
511707d4 SP |
98 | |
99 | if (old_path) | |
100 | strbuf_addstr(&new_path, old_path); | |
101 | else | |
cb6a22c0 | 102 | strbuf_addstr(&new_path, _PATH_DEFPATH); |
511707d4 SP |
103 | |
104 | setenv("PATH", new_path.buf, 1); | |
105 | ||
106 | strbuf_release(&new_path); | |
107 | } | |
77cb17e9 | 108 | |
20574f55 | 109 | const char **prepare_git_cmd(struct argv_array *out, const char **argv) |
77cb17e9 | 110 | { |
20574f55 JK |
111 | argv_array_push(out, "git"); |
112 | argv_array_pushv(out, argv); | |
113 | return out->argv; | |
4933e5eb SP |
114 | } |
115 | ||
116 | int execv_git_cmd(const char **argv) { | |
20574f55 JK |
117 | struct argv_array nargv = ARGV_ARRAY_INIT; |
118 | ||
119 | prepare_git_cmd(&nargv, argv); | |
120 | trace_argv_printf(nargv.argv, "trace: exec:"); | |
575ba9d6 | 121 | |
511707d4 | 122 | /* execvp() can only ever return if it fails */ |
20574f55 | 123 | sane_execvp("git", (char **)nargv.argv); |
77cb17e9 | 124 | |
511707d4 | 125 | trace_printf("trace: exec failed: %s\n", strerror(errno)); |
575ba9d6 | 126 | |
20574f55 | 127 | argv_array_clear(&nargv); |
511707d4 | 128 | return -1; |
77cb17e9 MO |
129 | } |
130 | ||
131 | ||
9201c707 | 132 | int execl_git_cmd(const char *cmd,...) |
77cb17e9 MO |
133 | { |
134 | int argc; | |
9201c707 JH |
135 | const char *argv[MAX_ARGS + 1]; |
136 | const char *arg; | |
77cb17e9 MO |
137 | va_list param; |
138 | ||
139 | va_start(param, cmd); | |
140 | argv[0] = cmd; | |
141 | argc = 1; | |
142 | while (argc < MAX_ARGS) { | |
143 | arg = argv[argc++] = va_arg(param, char *); | |
144 | if (!arg) | |
145 | break; | |
146 | } | |
147 | va_end(param); | |
148 | if (MAX_ARGS <= argc) | |
149 | return error("too many args to run %s", cmd); | |
150 | ||
151 | argv[argc] = NULL; | |
152 | return execv_git_cmd(argv); | |
153 | } |