add SKIPCOMPILE to tests

test/README.md

@@ -64,6 +64,15 @@ section.
 5. Failing test runs should dump enough information to diagnose the bug.  This
 includes stdout, stderr, any log files, and even the OS environment.
 
+There are a few environment variables that you can set to change the test suite
+behavior:
+
+* `KEEPTRASH=1` - This will leave the local repository data in a `tmp` directory
+and the remote repository data in `test/remote`.
+* `SKIPCOMPILE=1` - This skips the Git LFS compilation step.  Speeds up the
+tests when you're running the same test script multiple times without changing
+any Go code.
+
 ### Test Suite
 
 The `testenv.sh` script includes some global variables used in tests.  This

test/testhelpers.sh

@@ -115,13 +115,18 @@ setup() {
   rm -rf "test/remote"
   mkdir "test/remote"
 
+  if [ -z "$SKIPCOMPILE" ]; then
     echo "compile git-lfs for $0"
     script/bootstrap
+  fi
+
   $GITLFS version
 
+  if [ -z "$SKIPCOMPILE" ]; then
     for go in test/cmd/*.go; do
       go build -o "$BINPATH/$(basename $go .go)" "$go"
     done
+  fi
 
   echo "LFSTEST_URL=$LFS_URL_FILE LFSTEST_DIR=$REMOTEDIR lfstest-gitserver"
   LFSTEST_URL="$LFS_URL_FILE" LFSTEST_DIR="$REMOTEDIR" lfstest-gitserver > "$REMOTEDIR/gitserver.log" 2>&1 &