Fix bug introduced in the last release that broke git-annex sync when git-annex was installed from the standalone tarball.

This was introduced by commit 450ee53ab6

However, the same problem could affect other calls to programPath,
specifically some on the assistant. So, I fixed it at a deeper level.

Annex/Path.hs

@@ -11,7 +11,9 @@ module Annex.Path where
 
 import Common
 import Config.Files
-import System.Environment
+import Utility.Env
+
+import System.Environment (getExecutablePath)
 
 {- A fully qualified path to the currently running git-annex program.
  - 
@@ -19,15 +21,22 @@ import System.Environment
  - well, it returns the complete path to the program. But, on other OSs,
  - it might return just the basename. Fall back to reading the programFile,
  - or searching for the command name in PATH.
+ -
+ - The standalone build runs git-annex via ld.so, and defeats
+ - getExecutablePath. It sets GIT_ANNEX_PROGRAMPATH to the correct path
+ - to the wrapper script to use.
  -}
 programPath :: IO FilePath
-programPath = do
+programPath = go =<< getEnv "GIT_ANNEX_PROGRAMPATH"
+  where
+	go (Just p) = return p
+	go Nothing = do
 #if MIN_VERSION_base(4,6,0)
-	exe <- getExecutablePath
-	p <- if isAbsolute exe
-		then return exe
-		else readProgramFile
+		exe <- getExecutablePath
+		p <- if isAbsolute exe
+			then return exe
+			else readProgramFile
 #else
-	p <- readProgramFile
+		p <- readProgramFile
 #endif
-	maybe cannotFindProgram return =<< searchPath p
+		maybe cannotFindProgram return =<< searchPath p

debian/changelog

@@ -18,6 +18,8 @@ git-annex (5.20150318) UNRELEASED; urgency=medium
     command-line length limits and cause the commit to fail. This
     only happened when using the assistant in an indirect mode repository.
   * Work around curl bug when asked to download an empty url to a file.
+  * Fix bug introduced in the last release that broke git-annex sync
+    when git-annex was installed from the standalone tarball.
 
  -- Joey Hess <id@joeyh.name>  Thu, 19 Mar 2015 17:05:32 -0400
 

doc/bugs/git-annex_sync_fails_with___34__error_while_loading_shared_libraries__34__.mdwn

@@ -43,3 +43,4 @@ git-annex: sync: 2 failed
 # End of transcript or log.
 """]]
 
+> [[fixed|done]] --[[Joey]] 

doc/bugs/git_annex_sync_strange_shared_library_error.mdwn

@@ -1,44 +0,0 @@
-### Please describe the problem.
-git annex sync fails with "error while loading shared libraries: hostname: cannot open shared object file: No such file or directory" with hostname being the hostname of the remote git annex repo.
-
-### What steps will reproduce the problem?
-Running "git annex sync" in a normal git annex repo.
-
-### What version of git-annex are you using? On what operating system?
-Arch Linux with git-annex from the git-annex-bin AUR package:
-git-annex version: 5.20150317-g237d5b0
-
-build flags: Assistant Webapp Webapp-secure Pairing Testsuite S3 WebDAV Inotify DBus DesktopNotify XMPP DNS Feeds Quvi TDFA
-
-key/value backends: SHA256E SHA1E SHA512E SHA224E SHA384E SKEIN256E SKEIN512E MD5E SHA256 SHA1 SHA512 SHA224 SHA384 SKEIN256 SKEIN512 MD5 WORM URL
-
-remote types: git gcrypt S3 bup directory rsync web bittorrent webdav tahoe glacier ddar hook external
-
-### Please provide any additional information below.
-people describing the same problem here: <https://aur.archlinux.org/packages/git-annex-bin/>
-
-SSH and normal git operations work fine.
-
-[[!format sh """
-# If you can, paste a complete transcript of the problem occurring here.
-# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
-[dafo@simon-desktop dokumente_ga]$ git annex sync
-commit  ok
-pull leno 
-dafo@leno: error while loading shared libraries: dafo@leno: cannot open shared object file: No such file or directory
-fatal: Could not read from remote repository.
-Please make sure you have the correct access rights
-and the repository exists.
-failed
-push leno 
-dafo@leno: error while loading shared libraries: dafo@leno: cannot open shared object file: No such file or directory
-fatal: Could not read from remote repository.
-Please make sure you have the correct access rights
-and the repository exists.
-  Pushing to leno failed.
-  (non-fast-forward problems can be solved by setting receive.denyNonFastforwards to false in the remote's git config)
-failed
-git-annex: sync: 2 failed
-
-# End of transcript or log.
-"""]]

standalone/linux/skel/git-annex

@@ -28,4 +28,7 @@ if [ -e "$base/bin/git-annex" ]; then
 	export GIT_ANNEX_APP_BASE
 fi
 
+GIT_ANNEX_PROGRAMPATH="$0"
+export GIT_ANNEX_PROGRAMPATH
+
 exec "$base/runshell" git-annex "$@"