Provide a build time default-editor setting
[git/git.git] / editor.c
1 #include "cache.h"
2 #include "strbuf.h"
3 #include "run-command.h"
4
5 #ifndef DEFAULT_EDITOR
6 #define DEFAULT_EDITOR "vi"
7 #endif
8
9 const char *git_editor(void)
10 {
11 const char *editor = getenv("GIT_EDITOR");
12 const char *terminal = getenv("TERM");
13 int terminal_is_dumb = !terminal || !strcmp(terminal, "dumb");
14
15 if (!editor && editor_program)
16 editor = editor_program;
17 if (!editor && !terminal_is_dumb)
18 editor = getenv("VISUAL");
19 if (!editor)
20 editor = getenv("EDITOR");
21
22 if (!editor && terminal_is_dumb)
23 return NULL;
24
25 if (!editor)
26 editor = DEFAULT_EDITOR;
27
28 return editor;
29 }
30
31 int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
32 {
33 const char *editor = git_editor();
34
35 if (!editor)
36 return error("Terminal is dumb, but EDITOR unset");
37
38 if (strcmp(editor, ":")) {
39 size_t len = strlen(editor);
40 int i = 0;
41 int failed;
42 const char *args[6];
43 struct strbuf arg0 = STRBUF_INIT;
44
45 if (strcspn(editor, "|&;<>()$`\\\"' \t\n*?[#~=%") != len) {
46 /* there are specials */
47 strbuf_addf(&arg0, "%s \"$@\"", editor);
48 args[i++] = "sh";
49 args[i++] = "-c";
50 args[i++] = arg0.buf;
51 }
52 args[i++] = editor;
53 args[i++] = path;
54 args[i] = NULL;
55
56 failed = run_command_v_opt_cd_env(args, 0, NULL, env);
57 strbuf_release(&arg0);
58 if (failed)
59 return error("There was a problem with the editor '%s'.",
60 editor);
61 }
62
63 if (!buffer)
64 return 0;
65 if (strbuf_read_file(buffer, path, 0) < 0)
66 return error("could not read file '%s': %s",
67 path, strerror(errno));
68 return 0;
69 }