why-binaries-from-server-not-used.rst

Why binaries from server not used?

.. seealso::

  * :ref:`Using GitHub cache server <uploading to server>`

If settings and environment of your local project does not match environment of Travis/AppVeyor services (this is where binaries usually uploaded from) you will see Cache miss message and package will be build locally:

-- [hunter *** DEBUG *** ...] Downloading file (try #1 of 10):
-- [hunter *** DEBUG *** ...]   https://raw.githubusercontent.com/ingenue/hunter-cache/master/aa85dd8/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.DONE
-- [hunter *** DEBUG *** ...]   -> /.../_Base/Cache/meta/aa85dd8/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.DONE
-- [hunter *** DEBUG *** ...] File not found
-- [hunter *** DEBUG *** ...] Cache miss (no basic dependencies info found: /.../_Base/Cache/meta/aa85dd8/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.DONE)

Reproduce environment

Next information will help you to set your environment.

• Xcode 6.1 used by default on Travis CI:

• The OS X Build Environment
• iOS 8.1 SDK is default for Xcode 6.1
• Xcode 6.1 direct download link

• Xcode 7.3.1 used for osx_image: xcode7.3 on Travis CI:

• Xcode 7.3.1 image
• iOS 9.3 SDK is default for Xcode 7.3
• Xcode 7.3.1 direct download link

• Visual Studio versions on AppVeyor:

• https://www.appveyor.com/docs/installed-software/#visual-studio

• Docker can be used for reproducing Travis CI Linux environment:

• Install Docker on Ubuntu: https://docs.docker.com/engine/installation/linux/ubuntulinux/
• Pull image and run container by (see details):

> docker pull quay.io/ruslo/hunter-travis-trusty # pull/update image
> docker run -it quay.io/ruslo/hunter-travis-trusty bash
travis@...:~$ (cd polly && git pull) # fetch last changes
travis@...:~$ (cd hunter && git pull) # - // -
travis@...:~$  cd hunter && TOOLCHAIN=gcc PROJECT_DIR=examples/GTest ./jenkins.py --verbose --clear-except

Starting GUI:

> xhost +
> docker run -it -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix quay.io/ruslo/hunter-travis-trusty bash
travis@...:~$ firefox

Information from logs

When HUNTER_STATUS_DEBUG is ON you can find information about servers and cache state.

List of servers used (HUNTER_CACHE_SERVERS):

-- [hunter *** DEBUG *** ...] List of cache servers:
-- [hunter *** DEBUG *** ...]   * https://github.com/ingenue/hunter-cache

Meta information not found on server (cache miss):

-- [hunter *** DEBUG *** ...] Try to download file (try #0 of 3):
-- [hunter *** DEBUG *** ...]   https://raw.githubusercontent.com/ingenue/hunter-cache/master/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.info
-- [hunter *** DEBUG *** ...]   -> /.../_Base/Cache/meta/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.info
-- [hunter *** DEBUG *** ...] File not found
-- [hunter *** DEBUG *** ...] Cache miss (no basic dependencies info found: /.../_Base/Cache/meta/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.DONE)

Meta information found on server (cache hit):

-- [hunter *** DEBUG *** ...] Try to download file (try #0 of 3):
-- [hunter *** DEBUG *** ...]   https://raw.githubusercontent.com/ingenue/hunter-cache/master/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/da39a3e/cache.sha1
-- [hunter *** DEBUG *** ...]   -> /.../_Base/Cache/meta/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/da39a3e/cache.sha1
-- [hunter] Cache HIT: GTest
-- [hunter] Cache info: /.../_Base/Cache/meta/2695528/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/da39a3e/cache.sha1

Downloading archive with binaries:

-- [hunter *** DEBUG *** ...] Try to download file (try #0 of 3):
-- [hunter *** DEBUG *** ...]   https://github.com/ingenue/hunter-cache/releases/download/cache/da62fc35901e07d30db7a1c19b7358855978e11f.tar.bz2
-- [hunter *** DEBUG *** ...]   -> /.../_Base/Cache/raw/da62fc35901e07d30db7a1c19b7358855978e11f.tar.bz2
-- [hunter *** DEBUG *** ...] Unpacking:
-- [hunter *** DEBUG *** ...]   /.../_Base/Cache/raw/da62fc35901e07d30db7a1c19b7358855978e11f.tar.bz2
-- [hunter *** DEBUG *** ...]   -> /.../_Base/3f0dbc9/6104b67/2695528/Install

.. seealso::

  * `Example of log <https://travis-ci.org/forexample/hunter-simple/jobs/116296645>`__

Debugging mismatches

If environment looks the same and you're expecting everything to work fine but still see Cache miss message you can download meta directory and do investigate problem:

> git clone https://github.com/ingenue/hunter-cache

Information about missing cache entry:

-- [hunter *** DEBUG *** ...] Downloading file (try #1 of 10):
-- [hunter *** DEBUG *** ...]   https://raw.githubusercontent.com/ingenue/hunter-cache/master/aa85dd8/GTest/1.8.0-hunter-p2/93148cb/da39a3e/a49b0e5/356a192/basic-deps.DONE

First aa85dd8 id is about toolchain. You can find the path to toolchain info in logs:

-- [hunter *** DEBUG *** ...] HUNTER_TOOLCHAIN_ID_PATH: /.../_Base/86b1bc9/aa85dd8

> openssl sha1 /.../_Base/86b1bc9/aa85dd8/toolchain.info
SHA1(toolchain.info)= aa85dd86f2feefe76397d7b624ccb6c09d971fe5

You can see that there is no aa85dd8 entry in cache:

> ls hunter-cache/aa85dd8
ls: cannot access 'hunter-cache/aa85dd8': No such file or directory

However in Travis build log toolchain-id is 8928885:

> ls hunter-cache/8928885/toolchain.info
hunter-cache/8928885/toolchain.info

Compare both files to figure out what's wrong:

> diff hunter-cache/8928885/toolchain.info /.../_Base/86b1bc9/aa85dd8/toolchain.info
...
< #define __GNUC_MINOR__ 8
< #define __GNUC_PATCHLEVEL__ 1
---
> #define __GNUC_MINOR__ 4
> #define __GNUC_PATCHLEVEL__ 0
111,112c115,116
< #define __GNUC__ 4
< #define __GNUG__ 4
---
> #define __GNUC__ 5
> #define __GNUG__ 5

It means that local GCC version is 5.4.0 and server version is 4.8.1.