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vshReadlineParse: Drop code duplication
Now that we have a way of retrieving partly parsed command we don't need duplicate code that parses the user's input. Yes, this code removes call of opt's completer, but: a) current implementation is broken anyway, and b) it will be added back shortly Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik
parent
2e688d96a4
commit
255be07d35
214
tools/vsh.c
214
tools/vsh.c
@ -2697,216 +2697,50 @@ vshReadlineOptionsGenerator(const char *text, int state, const vshCmdDef *cmd_pa
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static char *
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vshReadlineParse(const char *text, int state)
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{
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static vshCommandParser parser, sanitizer;
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vshCommandToken tk;
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static vshCmd *partial;
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static const vshCmdDef *cmd;
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const vshCmdOptDef *opt = NULL;
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char *tkdata, *optstr, *const_tkdata, *completed_name;
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char *res = NULL;
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static char *ctext, *sanitized_text;
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static char **completed_list;
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static unsigned int completed_list_index;
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static uint64_t const_opts_need_arg, const_opts_required, const_opts_seen;
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uint64_t opts_seen;
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size_t opt_index;
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static bool cmd_exists, opts_filled, opt_exists;
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static bool non_bool_opt_exists, data_complete;
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if (!state) {
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parser.pos = rl_line_buffer;
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parser.getNextArg = vshCommandStringGetArg;
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ctext = vshStrdup(NULL, text);
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sanitizer.pos = ctext;
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sanitizer.getNextArg = vshCommandStringGetArg;
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const_tkdata = NULL;
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tkdata = NULL;
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sanitized_text = NULL;
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optstr = NULL;
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completed_list = NULL;
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completed_list_index = 0;
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/* Sanitize/de-quote the autocomplete text */
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tk = sanitizer.getNextArg(NULL, &sanitizer, &sanitized_text, false);
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/* No autocomplete if sanitized text is a token error or token end */
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if (tk == VSH_TK_ERROR)
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goto error;
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tk = parser.getNextArg(NULL, &parser, &const_tkdata, false);
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if (tk == VSH_TK_ERROR)
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goto error;
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/* Free-ing purposes */
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tkdata = const_tkdata;
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/* Skip leading space */
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virSkipSpaces((const char**)&tkdata);
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/* Handle ';'s */
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while (tk == VSH_TK_SUBCMD_END) {
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tk = parser.getNextArg(NULL, &parser, &const_tkdata, false);
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tkdata = const_tkdata;
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}
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/* Skip trailing space after ;*/
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virSkipSpaces((const char**)&tkdata);
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cmd_exists = false;
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opts_filled = false;
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non_bool_opt_exists = false;
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data_complete = false;
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const_opts_need_arg = 0;
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const_opts_required = 0;
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const_opts_seen = 0;
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opt_index = 0;
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char *buf = vshStrdup(NULL, rl_line_buffer);
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vshCommandFree(partial);
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partial = NULL;
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cmd = NULL;
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opt = NULL;
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/* Parse till text to be auto-completed is reached */
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while (STRNEQ(tkdata, sanitized_text)) {
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if (!cmd) {
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if (!(cmd = vshCmddefSearch(tkdata)))
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goto error;
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if (cmd->flags & VSH_CMD_FLAG_ALIAS)
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cmd = vshCmddefSearch(cmd->alias);
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*(buf + rl_point) = '\0';
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cmd_exists = true;
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if (vshCmddefOptParse(cmd, &const_opts_need_arg,
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&const_opts_required) < 0)
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goto error;
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opts_seen = const_opts_seen;
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opts_filled = true;
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} else if (tkdata[0] == '-' && tkdata[1] == '-' &&
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c_isalnum(tkdata[2])) {
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/* Command retrieved successfully, move to options */
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optstr = strchr(tkdata + 2, '=');
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opt_index = 0;
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vshCommandStringParse(NULL, buf, &partial);
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if (optstr) {
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*optstr = '\0';
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optstr = vshStrdup(NULL, optstr + 1);
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}
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VIR_FREE(buf);
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if (!(opt = vshCmddefGetOption(NULL, cmd, tkdata + 2,
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&opts_seen, &opt_index,
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&optstr, false))) {
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/* Parsing failed wrt autocomplete */
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VIR_FREE(optstr);
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goto error;
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}
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if (partial)
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cmd = partial->def;
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opts_seen = const_opts_seen;
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opt_exists = true;
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VIR_FREE(const_tkdata);
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if (opt->type != VSH_OT_BOOL) {
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non_bool_opt_exists = true;
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/* Opt exists and check for option data */
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if (optstr) {
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const_tkdata = optstr;
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tkdata = const_tkdata;
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} else {
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VIR_FREE(const_tkdata);
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tk = parser.getNextArg(NULL, &parser, &const_tkdata,
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false);
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if (tk == VSH_TK_ERROR)
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goto error;
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tkdata = const_tkdata;
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virSkipSpaces((const char **)&tkdata);
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}
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if (STREQ(tkdata, sanitized_text)) {
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/* auto-complete non-bool option arg */
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data_complete = true;
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break;
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}
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non_bool_opt_exists = false;
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} else {
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tkdata = NULL;
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/* opt type is BOOL */
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if (optstr) {
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VIR_FREE(optstr);
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goto error;
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}
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}
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} else if (!opt_exists) {
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/* No -- option provided and some other token given
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* Try to find the default option.
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*/
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if (!(opt = vshCmddefGetData(cmd, &const_opts_need_arg,
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&const_opts_seen))
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|| opt->type == VSH_OT_BOOL)
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goto error;
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opt_exists = true;
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opts_seen = const_opts_seen;
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} else {
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/* In every other case, return NULL */
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goto error;
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}
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VIR_FREE(const_tkdata);
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tk = parser.getNextArg(NULL, &parser, &const_tkdata, false);
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if (tk == VSH_TK_ERROR)
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goto error;
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while (tk == VSH_TK_SUBCMD_END) {
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cmd = NULL;
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cmd_exists = false;
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opts_filled = false;
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opt = NULL;
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non_bool_opt_exists = false;
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tk = parser.getNextArg(NULL, &parser, &const_tkdata, false);
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}
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tkdata = const_tkdata;
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virSkipSpaces((const char**)&tkdata);
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if (cmd && STREQ(cmd->name, text)) {
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/* Corner case - some commands share prefix (e.g.
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* dump and dumpxml). If user typed 'dump<TAB><TAB>',
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* then @text = "dump" and we want to offer command
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* completion. If they typed 'dump <TAB><TAB>' then
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* @text = "" (the space after the command) and we
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* want to offer options completion for dump command.
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*/
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cmd = NULL;
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}
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VIR_FREE(const_tkdata);
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}
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if (!cmd_exists) {
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res = vshReadlineCommandGenerator(sanitized_text, state);
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} else if (opts_filled && !non_bool_opt_exists) {
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res = vshReadlineOptionsGenerator(sanitized_text, state, cmd);
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} else if (non_bool_opt_exists && data_complete && opt && opt->completer) {
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if (!completed_list)
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completed_list = opt->completer(autoCompleteOpaque,
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opt->completer_flags);
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if (completed_list) {
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while ((completed_name = completed_list[completed_list_index])) {
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completed_list_index++;
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if (!STRPREFIX(completed_name, sanitized_text))
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continue;
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res = vshStrdup(NULL, completed_name);
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return res;
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}
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res = NULL;
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virStringListFree(completed_list);
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completed_list_index = 0;
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}
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if (!cmd) {
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res = vshReadlineCommandGenerator(text, state);
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} else {
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res = vshReadlineOptionsGenerator(text, state, cmd);
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}
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if (!res) {
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VIR_FREE(sanitized_text);
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VIR_FREE(ctext);
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vshCommandFree(partial);
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partial = NULL;
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}
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return res;
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error:
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VIR_FREE(const_tkdata);
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VIR_FREE(sanitized_text);
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VIR_FREE(ctext);
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return NULL;
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}
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static char **
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