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-rw-r--r--editor.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/editor.c b/editor.c
new file mode 100644
index 0000000..b67b802
--- /dev/null
+++ b/editor.c
@@ -0,0 +1,163 @@
+#include "git-compat-util.h"
+#include "abspath.h"
+#include "advice.h"
+#include "config.h"
+#include "editor.h"
+#include "environment.h"
+#include "gettext.h"
+#include "pager.h"
+#include "path.h"
+#include "strbuf.h"
+#include "strvec.h"
+#include "run-command.h"
+#include "sigchain.h"
+
+#ifndef DEFAULT_EDITOR
+#define DEFAULT_EDITOR "vi"
+#endif
+
+int is_terminal_dumb(void)
+{
+ const char *terminal = getenv("TERM");
+ return !terminal || !strcmp(terminal, "dumb");
+}
+
+const char *git_editor(void)
+{
+ const char *editor = getenv("GIT_EDITOR");
+ int terminal_is_dumb = is_terminal_dumb();
+
+ if (!editor && editor_program)
+ editor = editor_program;
+ if (!editor && !terminal_is_dumb)
+ editor = getenv("VISUAL");
+ if (!editor)
+ editor = getenv("EDITOR");
+
+ if (!editor && terminal_is_dumb)
+ return NULL;
+
+ if (!editor)
+ editor = DEFAULT_EDITOR;
+
+ return editor;
+}
+
+const char *git_sequence_editor(void)
+{
+ const char *editor = getenv("GIT_SEQUENCE_EDITOR");
+
+ if (!editor)
+ git_config_get_string_tmp("sequence.editor", &editor);
+ if (!editor)
+ editor = git_editor();
+
+ return editor;
+}
+
+static int launch_specified_editor(const char *editor, const char *path,
+ struct strbuf *buffer, const char *const *env)
+{
+ if (!editor)
+ return error("Terminal is dumb, but EDITOR unset");
+
+ if (strcmp(editor, ":")) {
+ struct strbuf realpath = STRBUF_INIT;
+ struct child_process p = CHILD_PROCESS_INIT;
+ int ret, sig;
+ int print_waiting_for_editor = advice_enabled(ADVICE_WAITING_FOR_EDITOR) && isatty(2);
+
+ if (print_waiting_for_editor) {
+ /*
+ * A dumb terminal cannot erase the line later on. Add a
+ * newline to separate the hint from subsequent output.
+ *
+ * Make sure that our message is separated with a whitespace
+ * from further cruft that may be written by the editor.
+ */
+ const char term = is_terminal_dumb() ? '\n' : ' ';
+
+ fprintf(stderr,
+ _("hint: Waiting for your editor to close the file...%c"),
+ term);
+ fflush(stderr);
+ }
+
+ strbuf_realpath(&realpath, path, 1);
+
+ strvec_pushl(&p.args, editor, realpath.buf, NULL);
+ if (env)
+ strvec_pushv(&p.env, (const char **)env);
+ p.use_shell = 1;
+ p.trace2_child_class = "editor";
+ if (start_command(&p) < 0) {
+ strbuf_release(&realpath);
+ return error("unable to start editor '%s'", editor);
+ }
+
+ sigchain_push(SIGINT, SIG_IGN);
+ sigchain_push(SIGQUIT, SIG_IGN);
+ ret = finish_command(&p);
+ strbuf_release(&realpath);
+ sig = ret - 128;
+ sigchain_pop(SIGINT);
+ sigchain_pop(SIGQUIT);
+ if (sig == SIGINT || sig == SIGQUIT)
+ raise(sig);
+ if (ret)
+ return error("There was a problem with the editor '%s'.",
+ editor);
+
+ if (print_waiting_for_editor && !is_terminal_dumb())
+ /*
+ * Erase the entire line to avoid wasting the
+ * vertical space.
+ */
+ term_clear_line();
+ }
+
+ if (!buffer)
+ return 0;
+ if (strbuf_read_file(buffer, path, 0) < 0)
+ return error_errno("could not read file '%s'", path);
+ return 0;
+}
+
+int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
+{
+ return launch_specified_editor(git_editor(), path, buffer, env);
+}
+
+int launch_sequence_editor(const char *path, struct strbuf *buffer,
+ const char *const *env)
+{
+ return launch_specified_editor(git_sequence_editor(), path, buffer, env);
+}
+
+int strbuf_edit_interactively(struct strbuf *buffer, const char *path,
+ const char *const *env)
+{
+ char *path2 = NULL;
+ int fd, res = 0;
+
+ if (!is_absolute_path(path))
+ path = path2 = xstrdup(git_path("%s", path));
+
+ fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (fd < 0)
+ res = error_errno(_("could not open '%s' for writing"), path);
+ else if (write_in_full(fd, buffer->buf, buffer->len) < 0) {
+ res = error_errno(_("could not write to '%s'"), path);
+ close(fd);
+ } else if (close(fd) < 0)
+ res = error_errno(_("could not close '%s'"), path);
+ else {
+ strbuf_reset(buffer);
+ if (launch_editor(path, buffer, env) < 0)
+ res = error_errno(_("could not edit '%s'"), path);
+ unlink(path);
+ }
+
+ free(path2);
+ return res;
+}