Reference codebase for Universal-ctags

This is the reference codebase for measuring the performance of Universal-ctags parsers.

How to run ctags for the code base

We assume you may have enough storage space on your PC.

1. Get the input code for a parser for the language you are interested in with following command line:

   $ ./codebase clone <LANGUAGE>

   The following command lists available languages:

   $ ./codebase list-languages
   #           LANGUAGE    CODE
                      C    linux
                    C++    qtbase rocksdb
                     Go    buildah kubernetes
                   HTML    cockpit
             JavaScript    cockpit
               LdScript    linux
             ObjectiveC    gnustep-libs-base

   An example preparing C source code:

   $ ./codebae clone C
   ...

2. Run Universal-ctags for the cloned code with following command line:

   $ [CTAGS_EXE=${where your ctags executable is}] ./codebase ctags <LANGUAGE> [<PROFILE>]

   codebase refers CTAGS_EXE environment variable to run ctags. --ctags ${where your ctags executable is} is an alternative way to specify the ctags executable you want to test.

   You can run ctags with different option combination. We call such option combination PROFILE. The following command is for listing predefined profiles:

   $ ./codebase list-profiles
   
           PROFILE         DESCRIPTION
           maximum0        Enables all extras, fields, and kinds
           minimum0        Disables all fields and extras.

   Results are displayed to your terminal. Tee'ed output goes to a file under results/ directory.

   An example command line for running C parser:

   $ cd /home/yamato/hacking/ctags-github; ./autogen.sh; ./configure; make
   $ cd /home/yamato/hacking/codebase
   $ CTAGS_EXE=/home/yamato/hacking/ctags-github/ctags ./codebase ctags C
   version: 2c46f6d4
   features: +wildcards +regex +iconv +option-directory +xpath +json +interactive +sandbox +yaml +aspell +packcc
   log: results/2c46f6d4,C...................,..........,time......,default...,2019-03-18-12:47:20.log
   tagsoutput: /dev/null
   cmdline: + /home/yamato/var/ctags-github/ctags --quiet --options=NONE --sort=no --options=profile.d/maps --totals=yes --languages=C -o - -R code/linux code/php-src code/ruby
   27886 files, 19784832 lines (555082 kB) scanned in 15.1 seconds (36686 kB/s)
   1158391 tags added to tag file
   
   real    0m15.172s
   user    0m14.735s
   sys     0m0.399s
   + set +x

   In the above output, "36686 kB/s" represents the speed of parsing of C parser. "1158391 tags" represents the number of tags captured by C parser.

codebase stores the cloned source code to code directory. The directory is repository base. codebase makes another directory, lang, for your convince. As the name shows, lang is language bases. You can run ctags directly on a directory for the language you are interested in:

[codebase]$ cd lang
[codebase/lang]$ ls
Asm    C++      GDScript  Java        Kconfg    Lua   Markdown  Perl            R      SQL        VHDL
Basic  CMake    Go        JavaScript  Kotlin    Make  Meson     PHP             RSpec  SystemTap  XSLT
C      Fortran  HTML      Julia       LdScript  Man   OpenAPI   PuppetManifest  Ruby   Vala       YACC
[codebase/lang]$ ~/var/ctags-developing/ctags -R JavaScript
ctags: Warning: ignoring null tag in JavaScript/mediawiki/.svgo.config.js(line: 6)
ctags: main/entry.c:1454: registerEntry: Assertion `corkIndex != CORK_NIL' failed.
ctags: main/entry.c:1454: parsing JavaScript/mediawiki/.svgo.config.js:6 as JavaScript
Aborted (core dumped)

How to add your code to code base

You have to write a .lcopy file and put it to lcopy.d directory. See lcopy.d/linux.lcopy as an example:

REPO=https://github.com/torvalds/linux
ALIGNMENT=v4.20
LANGUAGES=C,LdScript,Asm,Kconfig,DTS

REPO specifies a git repository. ALIGNMENT is a tag put on the git repository. ALIGNMENT allows users of codebase to get the same source tree. LANGUAGES is a comma separated language list.

How to add your profile to preset list

You have to write a .ctags file and put it to profile.d directory. A line started from "# @" is used as a description for the profile. You may wan to use --options-maybe to extend profile without modifying existing .ctags files.

Let's optimize our parsers! Masatake YAMATO <yamato@redhat.com>