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, path, NULL };
  41                struct child_process p;
  42                int ret, sig;
  43
  44                memset(&p, 0, sizeof(p));
  45                p.argv = args;
  46                p.env = env;
  47                p.use_shell = 1;
  48                if (start_command(&p) < 0)
  49                        return error("unable to start editor '%s'", editor);
  50
  51                sigchain_push(SIGINT, SIG_IGN);
  52                sigchain_push(SIGQUIT, SIG_IGN);
  53                ret = finish_command(&p);
  54                sig = ret - 128;
  55                sigchain_pop(SIGINT);
  56                sigchain_pop(SIGQUIT);
  57                if (sig == SIGINT || sig == SIGQUIT)
  58                        raise(sig);
  59                if (ret)
  60                        return error("There was a problem with the editor '%s'.",
  61                                        editor);
  62        }
  63
  64        if (!buffer)
  65                return 0;
  66        if (strbuf_read_file(buffer, path, 0) < 0)
  67                return error("could not read file '%s': %s",
  68                                path, strerror(errno));
  69        return 0;
  70}