Andrew's git - gitweb.git/blob

   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
  10const char *git_editor(void)
  11{
  12        const char *editor = getenv("GIT_EDITOR");
  13        const char *terminal = getenv("TERM");
  14        int terminal_is_dumb = !terminal || !strcmp(terminal, "dumb");
  15
  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");
  22
  23        if (!editor && terminal_is_dumb)
  24                return NULL;
  25
  26        if (!editor)
  27                editor = DEFAULT_EDITOR;
  28
  29        return editor;
  30}
  31
  32int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
  33{
  34        const char *editor = git_editor();
  35
  36        if (!editor)
  37                return error("Terminal is dumb, but EDITOR unset");
  38
  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;
  43
  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);
  49
  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);
  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}