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1 | #include "cache.h" | |
2 | #include "strbuf.h" | |
3 | #include "run-command.h" | |
4 | #include "sigchain.h" | |
5 | ||
6 | #ifndef DEFAULT_EDITOR | |
7 | #define DEFAULT_EDITOR "vi" | |
8 | #endif | |
9 | ||
10 | int is_terminal_dumb(void) | |
11 | { | |
12 | const char *terminal = getenv("TERM"); | |
13 | return !terminal || !strcmp(terminal, "dumb"); | |
14 | } | |
15 | ||
16 | const char *git_editor(void) | |
17 | { | |
18 | const char *editor = getenv("GIT_EDITOR"); | |
19 | int terminal_is_dumb = is_terminal_dumb(); | |
20 | ||
21 | if (!editor && editor_program) | |
22 | editor = editor_program; | |
23 | if (!editor && !terminal_is_dumb) | |
24 | editor = getenv("VISUAL"); | |
25 | if (!editor) | |
26 | editor = getenv("EDITOR"); | |
27 | ||
28 | if (!editor && terminal_is_dumb) | |
29 | return NULL; | |
30 | ||
31 | if (!editor) | |
32 | editor = DEFAULT_EDITOR; | |
33 | ||
34 | return editor; | |
35 | } | |
36 | ||
37 | int launch_editor(const char *path, struct strbuf *buffer, const char *const *env) | |
38 | { | |
39 | const char *editor = git_editor(); | |
40 | ||
41 | if (!editor) | |
42 | return error("Terminal is dumb, but EDITOR unset"); | |
43 | ||
44 | if (strcmp(editor, ":")) { | |
45 | const char *args[] = { editor, real_path(path), NULL }; | |
46 | struct child_process p = CHILD_PROCESS_INIT; | |
47 | int ret, sig; | |
48 | int print_waiting_for_editor = advice_waiting_for_editor && isatty(2); | |
49 | ||
50 | if (print_waiting_for_editor) { | |
51 | /* | |
52 | * A dumb terminal cannot erase the line later on. Add a | |
53 | * newline to separate the hint from subsequent output. | |
54 | * | |
55 | * Make sure that our message is separated with a whitespace | |
56 | * from further cruft that may be written by the editor. | |
57 | */ | |
58 | const char term = is_terminal_dumb() ? '\n' : ' '; | |
59 | ||
60 | fprintf(stderr, | |
61 | _("hint: Waiting for your editor to close the file...%c"), | |
62 | term); | |
63 | fflush(stderr); | |
64 | } | |
65 | ||
66 | p.argv = args; | |
67 | p.env = env; | |
68 | p.use_shell = 1; | |
69 | if (start_command(&p) < 0) | |
70 | return error("unable to start editor '%s'", editor); | |
71 | ||
72 | sigchain_push(SIGINT, SIG_IGN); | |
73 | sigchain_push(SIGQUIT, SIG_IGN); | |
74 | ret = finish_command(&p); | |
75 | sig = ret - 128; | |
76 | sigchain_pop(SIGINT); | |
77 | sigchain_pop(SIGQUIT); | |
78 | if (sig == SIGINT || sig == SIGQUIT) | |
79 | raise(sig); | |
80 | if (ret) | |
81 | return error("There was a problem with the editor '%s'.", | |
82 | editor); | |
83 | ||
84 | if (print_waiting_for_editor && !is_terminal_dumb()) | |
85 | /* | |
86 | * Go back to the beginning and erase the entire line to | |
87 | * avoid wasting the vertical space. | |
88 | */ | |
89 | fputs("\r\033[K", stderr); | |
90 | } | |
91 | ||
92 | if (!buffer) | |
93 | return 0; | |
94 | if (strbuf_read_file(buffer, path, 0) < 0) | |
95 | return error_errno("could not read file '%s'", path); | |
96 | return 0; | |
97 | } |