kc3-lang/SDL/build-scripts/showrev.sh

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• Hash : 2dc788cb
  Author :
  Date : 2022-10-20T19:54:24
  

  build: Expand version info in SDL_REVISION and SDL_GetRevision()
  
  Instead of using a URL and git sha1, this uses `git describe` to
  describe the version relative to the nearest previous git tag, which
  gives a better indication of whether this is a release, a prerelease,
  a slightly patched prerelease, or a long way after the last release
  during active development.
  
  This serves two purposes: it makes those APIs more informative, and it
  also puts this information into the binary in a form that is easy to
  screen-scrape using strings(1). For instance, if the bundled version of
  SDL in a game has this, we can see at a glance what version it is.
  
  It's also shorter than using the web address of the origin git
  repository and the full git commit sha1.
  
  Also write the computed version into a file ./VERSION in `make dist`
  tarballs, so that when we build from a tarball on a system that doesn't
  have git available, we still get the version details.
  
  For the Perforce code path in showrev.sh, output the version number
  followed by the Perforce revision, in a format reminiscent of
  `git describe` (with p instead of g to indicate Perforce).
  
  For the code path with no VCS available at all, put a suffix on the
  version number to indicate that this is just a guess (we can't know
  whether this SDL version is actually a git snapshot or has been
  patched locally or similar).
  
  Resolves: https://github.com/libsdl-org/SDL/issues/6418
  Signed-off-by: Simon McVittie <smcv@collabora.com>
  

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• build-scripts/showrev.sh

• #!/bin/sh
  #
  # Print the current source revision, if available
  
  SDL_ROOT=$(dirname $0)/..
  cd $SDL_ROOT
  
  if [ -e ./VERSION ]; then
      cat ./VERSION
      exit 0
  fi
  
  major=$(sed -ne 's/^#define SDL_MAJOR_VERSION  *//p' include/SDL_version.h)
  minor=$(sed -ne 's/^#define SDL_MINOR_VERSION  *//p' include/SDL_version.h)
  micro=$(sed -ne 's/^#define SDL_PATCHLEVEL  *//p' include/SDL_version.h)
  version="${major}.${minor}.${micro}"
  
  if [ -x "$(command -v git)" ]; then
      rev="$(git describe --tags --long 2>/dev/null)"
      if [ -n "$rev" ]; then
          # e.g. release-2.24.0-542-g96361fc47
          # or release-2.24.1-5-g36b987dab
          # or prerelease-2.23.2-0-gcb46e1b3f
          echo "$rev"
          exit 0
      fi
  
      rev="$(git describe --always --tags --long 2>/dev/null)"
      if [ -n "$rev" ]; then
          # Just a truncated sha1, e.g. 96361fc47.
          # Turn it into e.g. 2.25.0-g96361fc47
          echo "${version}-g${rev}"
          exit 0
      fi
  fi
  
  if [ -x "$(command -v p4)" ]; then
      rev="$(p4 changes -m1 ./...\#have 2>/dev/null| awk '{print $2}')"
      if [ $? = 0 ]; then
          # e.g. 2.25.0-p7511446
          echo "${version}-p${rev}"
          exit 0
      fi
  fi
  
  # best we can do
  echo "${version}-no-vcs"
  exit 0
  

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