Ripscope 0.1.0

The first release. Ripscope answers cscope's searches over C source from the command
line, Vim, Neovim and Emacs, on x86-64 Linux and Windows.

Searches

• All of cscope's line-mode searches: symbols, definitions, functions called, callers,
  text, egrep patterns, files, includers and assignments. They run as one-shot queries
  (-L) or in line-oriented sessions (-l), with cscope's output format and session
  protocol. -C matches ASCII letters in either case.
• Each name takes the function or macro it sits in as its context, within its own
  file, so callers and callees come from where each call is written.
• Corrections read constructs that cscope misreads, such as extern "C" blocks,
  macros with CR LF line endings and pointer declarators.
• Assignment search also finds array initializers, subscript stores, and ++ and --
  on a named variable.
• Text and egrep searches read the files as they are now.
• An optional JSON interface (--json) keeps paths with spaces and non-ASCII bytes
  exact.

See differences from cscope
and the benchmarks.

Editors

• Integrations for Vim, through its built-in cscope support, for Neovim, and for
  Emacs, through xcscope.
• One-step setup. A plugin-manager line (lazy.nvim, vim-plug, or use-package :vc on
  Emacs 30 and newer) installs the integration and the executable of the same version.
• Each search finds its project: the nearest directory with cscope.files, else the
  Git repository, else the editor's current directory. The first search builds the
  project's index in your cache directory, and later searches keep it current.
  ripscope --project PATH reports the project and its index, and
  RIPSCOPE_CACHE_DIR moves the cache.

Freshness

• Index builds from explicit files, file lists (-i), cscope.files or directory
  discovery (-R), following literal includes through -I directories. Each update
  applies the selection again, so added, removed and renamed files are picked up.
• An update analyses again only the files whose size, times or identity changed, and
  commits in one SQLite transaction. Queries read a complete revision while another
  process updates.
• A session watches the files its index was made from and refreshes after a change,
  before the next query. No build or compilation database is needed.
• --verify checks the index and reads every file again, and -bu rebuilds a damaged
  index.

Platforms

• x86-64 Linux with glibc 2.28 or newer, and x86-64 Windows.
• The index lives on local storage. The
  limitations list the details.

Installation

• install.sh and install.ps1 verify and install the executable, set up Vim and
  Neovim, and print the line Emacs needs. --uninstall (-Uninstall in PowerShell)
  removes them again.
• Release archives for Linux and Windows, and Debian and RPM packages, each with a
  SHA-256 checksum.
• Source builds with Cargo.