pkgconf-3.0.5

[Bruce Dubbs]

New point version

Changes from 3.0.4 to 3.0.5:

• Correctness fixes:
  • Shell quoting and backslash escapes in pc(5) properties are now consumed once, after variable substitution, instead of while splitting the property beforehand. Quoting arriving from a variable is therefore treated like quoting written inline, --variable reports a value as the .pc file spells it, and fragments are escaped exactly once when rendered. This supersedes the 3.0.4 fix, which unescaped whitespace at parse time and so hid the escaping from consumers such as cmake's FindPkgConfig. See ​https://github.com/pkgconf/pkgconf/issues/575 and ​https://github.com/pkgconf/pkgconf/issues/579.
  • Metadata queries no longer consult Conflicts rules between the modules named on the command line, as reporting metadata does not combine them into a build. This covers --license, --license-file, --modversion, --path, --print-provides, --print-requires, --print-requires-private, --print-variables, --source and --variable. --cflags, --libs and --exists are unaffected. See ​https://github.com/pkgconf/pkgconf/issues/580.
  • ${pc_sysrootdir} is now injected into the path taken by every -isystem and -idirafter flag in a fragment list, rather than only the first.
  • -isystem and -idirafter written joined to their path, as in -isystem/opt, are split into the flag and the path it takes, so that the path is subject to the same sysroot injection and deduplication as the separated spelling.
  • Sysroot injection is decided by reading the fragment's path instead of remembering whether ${pc_sysrootdir} was expanded, so a path which already lies under the sysroot never acquires a doubled prefix.

• Performance:
  • The package cache and the fragment deduplication index are kept sorted and searched with bsearch() rather than re-sorted or scanned linearly.
  • Variable keys and fragment text are stored with the structures they belong to, and buffers are rewound and reused rather than reallocated.
  • Escaping, fragment rendering and path relocation write into their destination buffer directly. Resolving a graph of roughly forty modules is about six times faster than 3.0.4, and a small graph such as gio-2.0 about twice as fast.

• Build and portability fixes:
  • Fix the pkgconf-lite build, which failed to link because the dependency list renderer had come to depend on tracing machinery that pkgconf-lite omits.
  • Fix the test runner failing to build on MinGW, where the mkdtemp(3) fallback was compiled only for MSVC builds. See ​https://github.com/pkgconf/pkgconf/issues/582.
  • The meson build now defines HAVE_DECL_READLINKAT, so readlinkat(2) is used where it is available instead of always falling back to readlink(2). The MinGW and readlinkat fixes are by moi15moi.

• New libpkgconf API additions:
  • pkgconf_argv_split_raw: splits a string into an argument vector like pkgconf_argv_split, but leaves the quoting it reads in place.
  • pkgconf_fragment_filter_splice: like pkgconf_fragment_filter, but moves the matching fragments to the destination list instead of copying them.
  • pkgconf_charset_from_spans: compiles a span list into a byte set.
  • pkgconf_buffer_escape_charset: escapes a buffer against such a byte set.
  • pkgconf_buffer_rewind: empties a buffer while keeping its allocation.
  • pkgconf_list_splice: moves the contents of one list onto the end of another.