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#include "cache.h"
#include "strbuf.h"
#include "run-command.h"
int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
const char *editor, *terminal;
editor = getenv("GIT_EDITOR");
if (!editor && editor_program)
editor = editor_program;
if (!editor)
editor = getenv("VISUAL");
if (!editor)
editor = getenv("EDITOR");
terminal = getenv("TERM");
if (!editor && (!terminal || !strcmp(terminal, "dumb")))
return error("Terminal is dumb but no VISUAL nor EDITOR defined.");
if (!editor)
editor = "vi";
if (strcmp(editor, ":")) {
size_t len = strlen(editor);
int i = 0;
int failed;
const char *args[6];
struct strbuf arg0 = STRBUF_INIT;
if (strcspn(editor, "$ \t'") != len) {
/* there are specials */
strbuf_addf(&arg0, "%s \"$@\"", editor);
args[i++] = "sh";
args[i++] = "-c";
args[i++] = arg0.buf;
args[i++] = editor;
args[i++] = path;
args[i] = NULL;
failed = run_command_v_opt_cd_env(args, 0, NULL, env);
if (failed)
return error("There was a problem with the editor '%s'.",
if (!buffer)
return 0;
if (strbuf_read_file(buffer, path, 0) < 0)
return error("could not read file '%s': %s",
path, strerror(errno));
return 0;
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