| 1 | #define USE_THE_REPOSITORY_VARIABLE |
| 2 | |
| 3 | #include "git-compat-util.h" |
| 4 | #include "abspath.h" |
| 5 | #include "advice.h" |
| 6 | #include "config.h" |
| 7 | #include "editor.h" |
| 8 | #include "environment.h" |
| 9 | #include "gettext.h" |
| 10 | #include "pager.h" |
| 11 | #include "path.h" |
| 12 | #include "strbuf.h" |
| 13 | #include "strvec.h" |
| 14 | #include "run-command.h" |
| 15 | #include "sigchain.h" |
| 16 | |
| 17 | #ifndef DEFAULT_EDITOR |
| 18 | #define DEFAULT_EDITOR "vi" |
| 19 | #endif |
| 20 | |
| 21 | int is_terminal_dumb(void) |
| 22 | { |
| 23 | const char *terminal = getenv("TERM"); |
| 24 | return !terminal || !strcmp(terminal, "dumb"); |
| 25 | } |
| 26 | |
| 27 | const char *git_editor(void) |
| 28 | { |
| 29 | const char *editor = getenv("GIT_EDITOR"); |
| 30 | int terminal_is_dumb = is_terminal_dumb(); |
| 31 | |
| 32 | if (!editor) |
| 33 | editor = repo_config_values(the_repository)->editor_program; |
| 34 | if (!editor && !terminal_is_dumb) |
| 35 | editor = getenv("VISUAL"); |
| 36 | if (!editor) |
| 37 | editor = getenv("EDITOR"); |
| 38 | |
| 39 | if (!editor && terminal_is_dumb) |
| 40 | return NULL; |
| 41 | |
| 42 | if (!editor) |
| 43 | editor = DEFAULT_EDITOR; |
| 44 | |
| 45 | return editor; |
| 46 | } |
| 47 | |
| 48 | const char *git_sequence_editor(void) |
| 49 | { |
| 50 | const char *editor = getenv("GIT_SEQUENCE_EDITOR"); |
| 51 | |
| 52 | if (!editor) |
| 53 | repo_config_get_string_tmp(the_repository, "sequence.editor", &editor); |
| 54 | if (!editor) |
| 55 | editor = git_editor(); |
| 56 | |
| 57 | return editor; |
| 58 | } |
| 59 | |
| 60 | static int launch_specified_editor(const char *editor, const char *path, |
| 61 | struct strbuf *buffer, const char *const *env) |
| 62 | { |
| 63 | if (!editor) |
| 64 | return error("Terminal is dumb, but EDITOR unset"); |
| 65 | |
| 66 | if (strcmp(editor, ":")) { |
| 67 | struct strbuf realpath = STRBUF_INIT; |
| 68 | struct child_process p = CHILD_PROCESS_INIT; |
| 69 | int ret, sig; |
| 70 | int print_waiting_for_editor = advice_enabled(ADVICE_WAITING_FOR_EDITOR) && isatty(2); |
| 71 | |
| 72 | if (print_waiting_for_editor) { |
| 73 | /* |
| 74 | * A dumb terminal cannot erase the line later on. Add a |
| 75 | * newline to separate the hint from subsequent output. |
| 76 | * |
| 77 | * Make sure that our message is separated with a whitespace |
| 78 | * from further cruft that may be written by the editor. |
| 79 | */ |
| 80 | const char term = is_terminal_dumb() ? '\n' : ' '; |
| 81 | |
| 82 | fprintf(stderr, |
| 83 | _("hint: Waiting for your editor to close the file...%c"), |
| 84 | term); |
| 85 | fflush(stderr); |
| 86 | } |
| 87 | |
| 88 | strbuf_realpath(&realpath, path, 1); |
| 89 | |
| 90 | strvec_pushl(&p.args, editor, realpath.buf, NULL); |
| 91 | if (env) |
| 92 | strvec_pushv(&p.env, (const char **)env); |
| 93 | p.use_shell = 1; |
| 94 | p.trace2_child_class = "editor"; |
| 95 | if (start_command(&p) < 0) { |
| 96 | strbuf_release(&realpath); |
| 97 | return error("unable to start editor '%s'", editor); |
| 98 | } |
| 99 | |
| 100 | sigchain_push(SIGINT, SIG_IGN); |
| 101 | sigchain_push(SIGQUIT, SIG_IGN); |
| 102 | ret = finish_command(&p); |
| 103 | strbuf_release(&realpath); |
| 104 | sig = ret - 128; |
| 105 | sigchain_pop(SIGINT); |
| 106 | sigchain_pop(SIGQUIT); |
| 107 | if (sig == SIGINT || sig == SIGQUIT) |
| 108 | raise(sig); |
| 109 | if (print_waiting_for_editor && !is_terminal_dumb()) |
| 110 | /* |
| 111 | * Erase the entire line to avoid wasting the |
| 112 | * vertical space. |
| 113 | */ |
| 114 | term_clear_line(); |
| 115 | if (ret) |
| 116 | return error("there was a problem with the editor '%s'", |
| 117 | editor); |
| 118 | } |
| 119 | |
| 120 | if (!buffer) |
| 121 | return 0; |
| 122 | if (strbuf_read_file(buffer, path, 0) < 0) |
| 123 | return error_errno("could not read file '%s'", path); |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | int launch_editor(const char *path, struct strbuf *buffer, const char *const *env) |
| 128 | { |
| 129 | return launch_specified_editor(git_editor(), path, buffer, env); |
| 130 | } |
| 131 | |
| 132 | int launch_sequence_editor(const char *path, struct strbuf *buffer, |
| 133 | const char *const *env) |
| 134 | { |
| 135 | return launch_specified_editor(git_sequence_editor(), path, buffer, env); |
| 136 | } |
| 137 | |
| 138 | int strbuf_edit_interactively(struct repository *r, |
| 139 | struct strbuf *buffer, const char *path, |
| 140 | const char *const *env) |
| 141 | { |
| 142 | struct strbuf sb = STRBUF_INIT; |
| 143 | int fd, res = 0; |
| 144 | |
| 145 | if (!is_absolute_path(path)) |
| 146 | path = repo_git_path_append(r, &sb, "%s", path); |
| 147 | |
| 148 | fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
| 149 | if (fd < 0) |
| 150 | res = error_errno(_("could not open '%s' for writing"), path); |
| 151 | else if (write_in_full(fd, buffer->buf, buffer->len) < 0) { |
| 152 | res = error_errno(_("could not write to '%s'"), path); |
| 153 | close(fd); |
| 154 | } else if (close(fd) < 0) |
| 155 | res = error_errno(_("could not close '%s'"), path); |
| 156 | else { |
| 157 | strbuf_reset(buffer); |
| 158 | if (launch_editor(path, buffer, env) < 0) |
| 159 | res = error_errno(_("could not edit '%s'"), path); |
| 160 | unlink(path); |
| 161 | } |
| 162 | |
| 163 | strbuf_release(&sb); |
| 164 | return res; |
| 165 | } |