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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "strbuf.h" | |
4 | #include "run-command.h" | |
5 | #include "sigchain.h" | |
6 | ||
7 | #ifndef DEFAULT_EDITOR | |
8 | #define DEFAULT_EDITOR "vi" | |
9 | #endif | |
10 | ||
11 | int is_terminal_dumb(void) | |
12 | { | |
13 | const char *terminal = getenv("TERM"); | |
14 | return !terminal || !strcmp(terminal, "dumb"); | |
15 | } | |
16 | ||
17 | const char *git_editor(void) | |
18 | { | |
19 | const char *editor = getenv("GIT_EDITOR"); | |
20 | int terminal_is_dumb = is_terminal_dumb(); | |
21 | ||
22 | if (!editor && editor_program) | |
23 | editor = editor_program; | |
24 | if (!editor && !terminal_is_dumb) | |
25 | editor = getenv("VISUAL"); | |
26 | if (!editor) | |
27 | editor = getenv("EDITOR"); | |
28 | ||
29 | if (!editor && terminal_is_dumb) | |
30 | return NULL; | |
31 | ||
32 | if (!editor) | |
33 | editor = DEFAULT_EDITOR; | |
34 | ||
35 | return editor; | |
36 | } | |
37 | ||
38 | const char *git_sequence_editor(void) | |
39 | { | |
40 | const char *editor = getenv("GIT_SEQUENCE_EDITOR"); | |
41 | ||
42 | if (!editor) | |
43 | git_config_get_string_const("sequence.editor", &editor); | |
44 | if (!editor) | |
45 | editor = git_editor(); | |
46 | ||
47 | return editor; | |
48 | } | |
49 | ||
50 | static int launch_specified_editor(const char *editor, const char *path, | |
51 | struct strbuf *buffer, const char *const *env) | |
52 | { | |
53 | if (!editor) | |
54 | return error("Terminal is dumb, but EDITOR unset"); | |
55 | ||
56 | if (strcmp(editor, ":")) { | |
57 | const char *args[] = { editor, real_path(path), NULL }; | |
58 | struct child_process p = CHILD_PROCESS_INIT; | |
59 | int ret, sig; | |
60 | int print_waiting_for_editor = advice_waiting_for_editor && isatty(2); | |
61 | ||
62 | if (print_waiting_for_editor) { | |
63 | /* | |
64 | * A dumb terminal cannot erase the line later on. Add a | |
65 | * newline to separate the hint from subsequent output. | |
66 | * | |
67 | * Make sure that our message is separated with a whitespace | |
68 | * from further cruft that may be written by the editor. | |
69 | */ | |
70 | const char term = is_terminal_dumb() ? '\n' : ' '; | |
71 | ||
72 | fprintf(stderr, | |
73 | _("hint: Waiting for your editor to close the file...%c"), | |
74 | term); | |
75 | fflush(stderr); | |
76 | } | |
77 | ||
78 | p.argv = args; | |
79 | p.env = env; | |
80 | p.use_shell = 1; | |
81 | p.trace2_child_class = "editor"; | |
82 | if (start_command(&p) < 0) | |
83 | return error("unable to start editor '%s'", editor); | |
84 | ||
85 | sigchain_push(SIGINT, SIG_IGN); | |
86 | sigchain_push(SIGQUIT, SIG_IGN); | |
87 | ret = finish_command(&p); | |
88 | sig = ret - 128; | |
89 | sigchain_pop(SIGINT); | |
90 | sigchain_pop(SIGQUIT); | |
91 | if (sig == SIGINT || sig == SIGQUIT) | |
92 | raise(sig); | |
93 | if (ret) | |
94 | return error("There was a problem with the editor '%s'.", | |
95 | editor); | |
96 | ||
97 | if (print_waiting_for_editor && !is_terminal_dumb()) | |
98 | /* | |
99 | * Erase the entire line to avoid wasting the | |
100 | * vertical space. | |
101 | */ | |
102 | term_clear_line(); | |
103 | } | |
104 | ||
105 | if (!buffer) | |
106 | return 0; | |
107 | if (strbuf_read_file(buffer, path, 0) < 0) | |
108 | return error_errno("could not read file '%s'", path); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | int launch_editor(const char *path, struct strbuf *buffer, const char *const *env) | |
113 | { | |
114 | return launch_specified_editor(git_editor(), path, buffer, env); | |
115 | } | |
116 | ||
117 | int launch_sequence_editor(const char *path, struct strbuf *buffer, | |
118 | const char *const *env) | |
119 | { | |
120 | return launch_specified_editor(git_sequence_editor(), path, buffer, env); | |
121 | } |