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Commit | Line | Data |
---|---|---|
77cb17e9 MO |
1 | #include "cache.h" |
2 | #include "exec_cmd.h" | |
575ba9d6 | 3 | #include "quote.h" |
77cb17e9 MO |
4 | #define MAX_ARGS 32 |
5 | ||
6 | extern char **environ; | |
384df833 | 7 | static const char *argv_exec_path; |
e1464ca7 | 8 | static const char *argv0_path; |
77cb17e9 | 9 | |
2de9de5e SP |
10 | const char *system_path(const char *path) |
11 | { | |
966c6edd | 12 | if (!is_absolute_path(path) && argv0_path) { |
2de9de5e | 13 | struct strbuf d = STRBUF_INIT; |
966c6edd | 14 | strbuf_addf(&d, "%s/%s", argv0_path, path); |
2de9de5e SP |
15 | path = strbuf_detach(&d, NULL); |
16 | } | |
17 | return path; | |
18 | } | |
19 | ||
e1464ca7 JS |
20 | void git_set_argv0_path(const char *path) |
21 | { | |
22 | argv0_path = path; | |
23 | } | |
24 | ||
384df833 | 25 | void git_set_argv_exec_path(const char *exec_path) |
77cb17e9 | 26 | { |
384df833 | 27 | argv_exec_path = exec_path; |
c90d565a JS |
28 | /* |
29 | * Propagate this setting to external programs. | |
30 | */ | |
31 | setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1); | |
77cb17e9 MO |
32 | } |
33 | ||
34 | ||
35 | /* Returns the highest-priority, location to look for git programs. */ | |
962554c6 | 36 | const char *git_exec_path(void) |
77cb17e9 MO |
37 | { |
38 | const char *env; | |
39 | ||
384df833 SP |
40 | if (argv_exec_path) |
41 | return argv_exec_path; | |
77cb17e9 | 42 | |
d4ebc36c | 43 | env = getenv(EXEC_PATH_ENVIRONMENT); |
2b601626 | 44 | if (env && *env) { |
77cb17e9 MO |
45 | return env; |
46 | } | |
47 | ||
49fa65a7 | 48 | return system_path(GIT_EXEC_PATH); |
77cb17e9 MO |
49 | } |
50 | ||
511707d4 SP |
51 | static void add_path(struct strbuf *out, const char *path) |
52 | { | |
53 | if (path && *path) { | |
54 | if (is_absolute_path(path)) | |
55 | strbuf_addstr(out, path); | |
56 | else | |
10c4c881 | 57 | strbuf_addstr(out, make_nonrelative_path(path)); |
511707d4 | 58 | |
80ba074f | 59 | strbuf_addch(out, PATH_SEP); |
511707d4 SP |
60 | } |
61 | } | |
62 | ||
e1464ca7 | 63 | void setup_path(void) |
511707d4 SP |
64 | { |
65 | const char *old_path = getenv("PATH"); | |
f285a2d7 | 66 | struct strbuf new_path = STRBUF_INIT; |
511707d4 SP |
67 | |
68 | add_path(&new_path, argv_exec_path); | |
69 | add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT)); | |
49fa65a7 | 70 | add_path(&new_path, system_path(GIT_EXEC_PATH)); |
e1464ca7 | 71 | add_path(&new_path, argv0_path); |
511707d4 SP |
72 | |
73 | if (old_path) | |
74 | strbuf_addstr(&new_path, old_path); | |
75 | else | |
76 | strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin"); | |
77 | ||
78 | setenv("PATH", new_path.buf, 1); | |
79 | ||
80 | strbuf_release(&new_path); | |
81 | } | |
77cb17e9 | 82 | |
4933e5eb | 83 | const char **prepare_git_cmd(const char **argv) |
77cb17e9 | 84 | { |
7550be0a JH |
85 | int argc; |
86 | const char **nargv; | |
77cb17e9 | 87 | |
7550be0a JH |
88 | for (argc = 0; argv[argc]; argc++) |
89 | ; /* just counting */ | |
90 | nargv = xmalloc(sizeof(*nargv) * (argc + 2)); | |
77cb17e9 | 91 | |
7550be0a JH |
92 | nargv[0] = "git"; |
93 | for (argc = 0; argv[argc]; argc++) | |
94 | nargv[argc + 1] = argv[argc]; | |
95 | nargv[argc + 1] = NULL; | |
4933e5eb SP |
96 | return nargv; |
97 | } | |
98 | ||
99 | int execv_git_cmd(const char **argv) { | |
100 | const char **nargv = prepare_git_cmd(argv); | |
7550be0a | 101 | trace_argv_printf(nargv, "trace: exec:"); |
575ba9d6 | 102 | |
511707d4 | 103 | /* execvp() can only ever return if it fails */ |
7550be0a | 104 | execvp("git", (char **)nargv); |
77cb17e9 | 105 | |
511707d4 | 106 | trace_printf("trace: exec failed: %s\n", strerror(errno)); |
575ba9d6 | 107 | |
7550be0a | 108 | free(nargv); |
511707d4 | 109 | return -1; |
77cb17e9 MO |
110 | } |
111 | ||
112 | ||
9201c707 | 113 | int execl_git_cmd(const char *cmd,...) |
77cb17e9 MO |
114 | { |
115 | int argc; | |
9201c707 JH |
116 | const char *argv[MAX_ARGS + 1]; |
117 | const char *arg; | |
77cb17e9 MO |
118 | va_list param; |
119 | ||
120 | va_start(param, cmd); | |
121 | argv[0] = cmd; | |
122 | argc = 1; | |
123 | while (argc < MAX_ARGS) { | |
124 | arg = argv[argc++] = va_arg(param, char *); | |
125 | if (!arg) | |
126 | break; | |
127 | } | |
128 | va_end(param); | |
129 | if (MAX_ARGS <= argc) | |
130 | return error("too many args to run %s", cmd); | |
131 | ||
132 | argv[argc] = NULL; | |
133 | return execv_git_cmd(argv); | |
134 | } |