From patchwork Fri May 31 13:19:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philippe Waroquiers X-Patchwork-Id: 32958 Received: (qmail 90672 invoked by alias); 31 May 2019 13:19:21 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Delivered-To: mailing list gdb-patches@sourceware.org Received: (qmail 90589 invoked by uid 89); 31 May 2019 13:19:20 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-23.2 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_LOW, SPF_PASS autolearn=ham version=3.3.1 spammy=utilsc, utils.c, documentations, UD:utils.c X-HELO: mailsec108.isp.belgacom.be Received: from mailsec108.isp.belgacom.be (HELO mailsec108.isp.belgacom.be) (195.238.20.104) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 31 May 2019 13:19:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=skynet.be; i=@skynet.be; q=dns/txt; s=securemail; t=1559308758; x=1590844758; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=pUasj+fZT4aYNqeUbwRgEZU8xHs+37P6ROUe1gElFtU=; b=odhSpH/aYz/Roz//Ff58kXhdOKGrXSd5zyLc0qfjLKz/CXCQzz4p0Ejy ceN1h66BptcL5Abtu5FB3lhBQc4HJg==; Received: from 161.32-242-81.adsl-dyn.isp.belgacom.be (HELO md.home) ([81.242.32.161]) by relay.skynet.be with ESMTP/TLS/DHE-RSA-AES128-GCM-SHA256; 31 May 2019 15:19:10 +0200 From: Philippe Waroquiers To: gdb-patches@sourceware.org Cc: Philippe Waroquiers Subject: [RFA 2/4] Improve usability and/or readibility of help and apropos output. Date: Fri, 31 May 2019 15:19:01 +0200 Message-Id: <20190531131903.21203-3-philippe.waroquiers@skynet.be> In-Reply-To: <20190531131903.21203-1-philippe.waroquiers@skynet.be> References: <20190531131903.21203-1-philippe.waroquiers@skynet.be> MIME-Version: 1.0 X-IsSubscribed: yes The "help" command can output long list of command names or classes. Use the title style to style the command names or classes to make the output more readable. Similarly, change "apropos" command to also style the command names. It is sometimes unclear why "apropos REGEXP" lists some commands, and then the user has to manually do 'help command' for all commands listed by "apropos" to see more details about the matching commands. => Add an optional flag -v so that "apropos -v REGEXP": * outputs the full documentation of matching commands. * highlights the documentation parts matching REGEXP. --- gdb/ChangeLog | 11 +++++++++ gdb/cli/cli-cmds.c | 22 ++++++++++++------ gdb/cli/cli-decode.c | 55 +++++++++++++++++++++++++++++++++----------- gdb/cli/cli-decode.h | 1 + 4 files changed, 69 insertions(+), 20 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 318275b34c..7018c3347a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -7089,3 +7089,14 @@ End: Update all callers according to the changes in cli/cli-style.h. * utils.h (fputs_highlighted): New function. * utils.c (fputs_highlighted): Likewise. + +2019-05-31 Philippe Waroquiers + + * cli/cli-decode.h (apropos_cmd): Add verbose argument. + * cli/cli-decode.c (apropos_cmd): Likewise. Use print_doc_of_command + instead of print_help_for_command. + (print_doc_of_command): New function. + (help_list): Add 'apropos -v word' suggestion. + (print_help_for_command): Style the command name using title style. + * cli/cli-cmds.c (apropos_command): Parse optional -v flag. + (_initialize_cli_cmds): Describe -v in apropos_command help. diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c index daf409a558..5f36814467 100644 --- a/gdb/cli/cli-cmds.c +++ b/gdb/cli/cli-cmds.c @@ -1289,16 +1289,21 @@ show_user (const char *args, int from_tty) /* Search through names of commands and documentations for a certain regular expression. */ -static void -apropos_command (const char *searchstr, int from_tty) +static void +apropos_command (const char *arg, int from_tty) { - if (searchstr == NULL) + bool verbose = arg && check_for_argument (&arg, "-v", 2); + + if (verbose) + arg = skip_spaces (arg); + + if (arg == NULL || *arg == '\0') error (_("REGEXP string is empty")); - compiled_regex pattern (searchstr, REG_ICASE, + compiled_regex pattern (arg, REG_ICASE, _("Error in regular expression")); - apropos_cmd (gdb_stdout, cmdlist, pattern, ""); + apropos_cmd (gdb_stdout, cmdlist, verbose, pattern, ""); } /* Subroutine of alias_command to simplify it. @@ -1877,8 +1882,11 @@ Run the ``make'' program using the rest of the line as arguments.")); Show definitions of non-python/scheme user defined commands.\n\ Argument is the name of the user defined command.\n\ With no argument, show definitions of all user defined commands."), &showlist); - add_com ("apropos", class_support, apropos_command, - _("Search for commands matching a REGEXP")); + add_com ("apropos", class_support, apropos_command, _("\ +Search for commands matching a REGEXP\n\ +Usage: apropos [-v] REGEXP\n\ +Flag -v indicates to produce a verbose output, showing full documentation\n\ +of the matching commands.")); add_setshow_uinteger_cmd ("max-user-call-depth", no_class, &max_user_call_depth, _("\ diff --git a/gdb/cli/cli-decode.c b/gdb/cli/cli-decode.c index 72e2a97009..07e36b3132 100644 --- a/gdb/cli/cli-decode.c +++ b/gdb/cli/cli-decode.c @@ -23,6 +23,7 @@ #include "ui-out.h" #include "cli/cli-cmds.h" #include "cli/cli-decode.h" +#include "cli/cli-style.h" #include "common/gdb_optional.h" /* Prototypes for local functions. */ @@ -937,13 +938,42 @@ add_com_suppress_notification (const char *name, enum command_class theclass, &cmdlist, suppress_notification); } +/* If VERBOSE, print the full help for command C and highlight the + documentation parts matching HIGHLIGHT, + otherwise print only one-line help for command C. */ + +static void +print_doc_of_command (struct cmd_list_element *c, const char *prefix, + bool verbose, compiled_regex &highlight, + struct ui_file *stream) +{ + /* When printing the full documentation, add a line to separate + this documentation from the previous command help, in the likely + case that apropos finds several commands. */ + if (verbose) + fputs_filtered ("\n", stream); + + fprintf_styled (stream, title_style.style (), + "%s%s", prefix, c->name); + fputs_filtered (" -- ", stream); + if (verbose) + fputs_highlighted (c->doc, highlight, stream); + else + print_doc_line (stream, c->doc); + fputs_filtered ("\n", stream); +} + /* Recursively walk the commandlist structures, and print out the documentation of commands that match our regex in either their name, or their documentation. + If VERBOSE, prints the complete documentation and highlight the + documentation parts matching REGEX, otherwise prints only + the first line. */ -void -apropos_cmd (struct ui_file *stream, +void +apropos_cmd (struct ui_file *stream, struct cmd_list_element *commandlist, + bool verbose, compiled_regex ®ex, const char *prefix) { struct cmd_list_element *c; @@ -960,10 +990,7 @@ apropos_cmd (struct ui_file *stream, /* Try to match against the name. */ returnvalue = regex.search (c->name, name_len, 0, name_len, NULL); if (returnvalue >= 0) - { - print_help_for_command (c, prefix, - 0 /* don't recurse */, stream); - } + print_doc_of_command (c, prefix, verbose, regex, stream); } if (c->doc != NULL && returnvalue < 0) { @@ -971,10 +998,7 @@ apropos_cmd (struct ui_file *stream, /* Try to match against documentation. */ if (regex.search (c->doc, doc_len, 0, doc_len, NULL) >= 0) - { - print_help_for_command (c, prefix, - 0 /* don't recurse */, stream); - } + print_doc_of_command (c, prefix, verbose, regex, stream); } /* Check if this command has subcommands and is not an abbreviation. We skip listing subcommands of abbreviations @@ -983,7 +1007,7 @@ apropos_cmd (struct ui_file *stream, { /* Recursively call ourselves on the subcommand list, passing the right prefix in. */ - apropos_cmd (stream,*c->prefixlist,regex,c->prefixname); + apropos_cmd (stream, *c->prefixlist, verbose, regex, c->prefixname); } } } @@ -1126,6 +1150,9 @@ Type \"help all\" for the list of all commands."); fputs_filtered ("documentation.\n", stream); fputs_filtered ("Type \"apropos word\" to search " "for commands related to \"word\".\n", stream); + fputs_filtered ("Type \"apropos -v word\" for full documentation", stream); + wrap_here (""); + fputs_filtered (" of commands related to \"word\".\n", stream); fputs_filtered ("Command name abbreviations are allowed if unambiguous.\n", stream); } @@ -1212,10 +1239,12 @@ static void print_help_for_command (struct cmd_list_element *c, const char *prefix, int recurse, struct ui_file *stream) { - fprintf_filtered (stream, "%s%s -- ", prefix, c->name); + fprintf_styled (stream, title_style.style (), + "%s%s", prefix, c->name); + fputs_filtered (" -- ", stream); print_doc_line (stream, c->doc); fputs_filtered ("\n", stream); - + if (recurse && c->prefixlist != 0 && c->abbrev_flag == 0) diff --git a/gdb/cli/cli-decode.h b/gdb/cli/cli-decode.h index c53683d95c..f68b4c120f 100644 --- a/gdb/cli/cli-decode.h +++ b/gdb/cli/cli-decode.h @@ -249,6 +249,7 @@ extern void help_cmd_list (struct cmd_list_element *, enum command_class, extern void help_cmd (const char *, struct ui_file *); extern void apropos_cmd (struct ui_file *, struct cmd_list_element *, + bool verbose, compiled_regex &, const char *); /* Used to mark commands that don't do anything. If we just leave the