Merge branch 'jk/fetch-pack' into maint
[git.git] / editor.c
blob01c644cddbe8e57e31cc711aa0ca3838cf23c64d
1 #include "cache.h"
2 #include "strbuf.h"
3 #include "run-command.h"
4 #include "sigchain.h"
6 #ifndef DEFAULT_EDITOR
7 #define DEFAULT_EDITOR "vi"
8 #endif
10 const char *git_editor(void)
12 const char *editor = getenv("GIT_EDITOR");
13 const char *terminal = getenv("TERM");
14 int terminal_is_dumb = !terminal || !strcmp(terminal, "dumb");
16 if (!editor && editor_program)
17 editor = editor_program;
18 if (!editor && !terminal_is_dumb)
19 editor = getenv("VISUAL");
20 if (!editor)
21 editor = getenv("EDITOR");
23 if (!editor && terminal_is_dumb)
24 return NULL;
26 if (!editor)
27 editor = DEFAULT_EDITOR;
29 return editor;
32 int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
34 const char *editor = git_editor();
36 if (!editor)
37 return error("Terminal is dumb, but EDITOR unset");
39 if (strcmp(editor, ":")) {
40 const char *args[] = { editor, real_path(path), NULL };
41 struct child_process p = CHILD_PROCESS_INIT;
42 int ret, sig;
44 p.argv = args;
45 p.env = env;
46 p.use_shell = 1;
47 if (start_command(&p) < 0)
48 return error("unable to start editor '%s'", editor);
50 sigchain_push(SIGINT, SIG_IGN);
51 sigchain_push(SIGQUIT, SIG_IGN);
52 ret = finish_command(&p);
53 sig = ret - 128;
54 sigchain_pop(SIGINT);
55 sigchain_pop(SIGQUIT);
56 if (sig == SIGINT || sig == SIGQUIT)
57 raise(sig);
58 if (ret)
59 return error("There was a problem with the editor '%s'.",
60 editor);
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;