-#!/bin/bash -x
+#!/bin/bash
. shellopts.sh
set -e
git add "$1"
}
+check()
+{
+ echo
+ echo "check:" "$@"
+ if "$@"; then
+ echo ok
+ return 0
+ else
+ echo FAILED
+ exit 1
+ fi
+}
+
+check_not()
+{
+ echo
+ echo "check: NOT " "$@"
+ if "$@"; then
+ echo FAILED
+ exit 1
+ else
+ echo ok
+ return 0
+ fi
+}
+
+check_equal()
+{
+ echo
+ echo "check a:" "{$1}"
+ echo " b:" "{$2}"
+ if [ "$1" = "$2" ]; then
+ return 0
+ else
+ echo FAILED
+ exit 1
+ fi
+}
+
+fixnl()
+{
+ t=""
+ while read x; do
+ t="$t$x "
+ done
+ echo $t
+}
+
+multiline()
+{
+ while read x; do
+ set -- $x
+ for d in "$@"; do
+ echo "$d"
+ done
+ done
+}
+
+undo()
+{
+ git reset --hard HEAD~
+}
+
+last_commit_message()
+{
+ git log --pretty=format:%s -1
+}
rm -rf mainline subproj
mkdir mainline subproj
git commit -m 'sub1'
git branch sub1
git branch -m master subproj
+check true
create sub2
git commit -m 'sub2'
create main4
git commit -m 'main4'
git branch -m master mainline
+git branch subdir
git fetch ../subproj sub1
git branch sub1 FETCH_HEAD
-git subtree add --prefix=subdir FETCH_HEAD
+
+# check if --message works for add
+check_not git subtree merge --prefix=subdir sub1
+check_not git subtree pull --prefix=subdir ../subproj sub1
+git subtree add --prefix=subdir --message="Added subproject" sub1
+check_equal "$(last_commit_message)" "Added subproject"
+undo
+
+# check if --message works as -m and --prefix as -P
+git subtree add -P subdir -m "Added subproject using git subtree" sub1
+check_equal "$(last_commit_message)" "Added subproject using git subtree"
+undo
+
+# check if --message works with squash too
+git subtree add -P subdir -m "Added subproject with squash" --squash sub1
+check_equal "$(last_commit_message)" "Added subproject with squash"
+undo
+
+git subtree add --prefix=subdir/ FETCH_HEAD
+check_equal "$(last_commit_message)" "Add 'subdir/' from commit '$(git rev-parse sub1)'"
# this shouldn't actually do anything, since FETCH_HEAD is already a parent
git merge -m 'merge -s -ours' -s ours FETCH_HEAD
git fetch ../subproj sub2
git branch sub2 FETCH_HEAD
+
+# check if --message works for merge
+git subtree merge --prefix=subdir -m "Merged changes from subproject" sub2
+check_equal "$(last_commit_message)" "Merged changes from subproject"
+undo
+
+# check if --message for merge works with squash too
+git subtree merge --prefix subdir -m "Merged changes from subproject using squash" --squash sub2
+check_equal "$(last_commit_message)" "Merged changes from subproject using squash"
+undo
+
git subtree merge --prefix=subdir FETCH_HEAD
git branch pre-split
+check_equal "$(last_commit_message)" "Merge commit '$(git rev-parse sub2)' into mainline"
+
+# Check that prefix argument is required for split (exits with warning and exit status = 1)
+! result=$(git subtree split 2>&1)
+check_equal "You must provide the --prefix option." "$result"
+
+# Check that the <prefix> exists for a split.
+! result=$(git subtree split --prefix=non-existent-directory 2>&1)
+check_equal "'non-existent-directory' does not exist; use 'git subtree add'" \
+ "$result"
+
+# check if --message works for split+rejoin
+spl1=$(git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --message "Split & rejoin" --rejoin)
+echo "spl1={$spl1}"
+git branch spl1 "$spl1"
+check_equal "$(last_commit_message)" "Split & rejoin"
+undo
+
+# check split with --branch
+git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --branch splitbr1
+check_equal "$(git rev-parse splitbr1)" "$spl1"
+
+# check split with --branch for an existing branch
+git branch splitbr2 sub1
+git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --branch splitbr2
+check_equal "$(git rev-parse splitbr2)" "$spl1"
-split1=$(git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --rejoin)
-echo "split1={$split1}"
-git branch split1 "$split1"
+# check split with --branch for an incompatible branch
+result=$(git subtree split --prefix subdir --onto FETCH_HEAD --branch subdir || echo "caught error")
+check_equal "$result" "caught error"
+
+
+git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --rejoin
+check_equal "$(last_commit_message)" "Split 'subdir/' into commit '$spl1'"
create subdir/main-sub8
git commit -m 'main-sub8'
cd ../subproj
-git fetch ../mainline split1
-git branch split1 FETCH_HEAD
+git fetch ../mainline spl1
+git branch spl1 FETCH_HEAD
git merge FETCH_HEAD
create sub9
git commit -m 'sub9'
cd ../mainline
-split2=$(git subtree split --annotate='*' --prefix subdir --rejoin)
+split2=$(git subtree split --annotate='*' --prefix subdir/ --rejoin)
git branch split2 "$split2"
create subdir/main-sub10
git commit -m 'main-sub10'
-split3=$(git subtree split --annotate='*' --prefix subdir --rejoin)
-git branch split3 "$split3"
+spl3=$(git subtree split --annotate='*' --prefix subdir --rejoin)
+git branch spl3 "$spl3"
cd ../subproj
-git fetch ../mainline split3
-git branch split3 FETCH_HEAD
+git fetch ../mainline spl3
+git branch spl3 FETCH_HEAD
git merge FETCH_HEAD
-git branch subproj-merge-split3
+git branch subproj-merge-spl3
+
+chkm="main4 main6"
+chkms="main-sub10 main-sub5 main-sub7 main-sub8"
+chkms_sub=$(echo $chkms | multiline | sed 's,^,subdir/,' | fixnl)
+chks="sub1 sub2 sub3 sub9"
+chks_sub=$(echo $chks | multiline | sed 's,^,subdir/,' | fixnl)
+
+# make sure exactly the right set of files ends up in the subproj
+subfiles=$(git ls-files | fixnl)
+check_equal "$subfiles" "$chkms $chks"
+
+# make sure the subproj history *only* contains commits that affect the subdir.
+allchanges=$(git log --name-only --pretty=format:'' | sort | fixnl)
+check_equal "$allchanges" "$chkms $chks"
cd ../mainline
-git fetch ../subproj subproj-merge-split3
-git branch subproj-merge-split3 FETCH_HEAD
-git subtree pull --prefix=subdir ../subproj subproj-merge-split3
+git fetch ../subproj subproj-merge-spl3
+git branch subproj-merge-spl3 FETCH_HEAD
+git subtree pull --prefix=subdir ../subproj subproj-merge-spl3
+
+# make sure exactly the right set of files ends up in the mainline
+mainfiles=$(git ls-files | fixnl)
+check_equal "$mainfiles" "$chkm $chkms_sub $chks_sub"
+
+# make sure each filename changed exactly once in the entire history.
+# 'main-sub??' and '/subdir/main-sub??' both change, because those are the
+# changes that were split into their own history. And 'subdir/sub??' never
+# change, since they were *only* changed in the subtree branch.
+allchanges=$(git log --name-only --pretty=format:'' | sort | fixnl)
+check_equal "$allchanges" "$(echo $chkms $chkm $chks $chkms_sub | multiline | sort | fixnl)"
+
+# make sure the --rejoin commits never make it into subproj
+check_equal "$(git log --pretty=format:'%s' HEAD^2 | grep -i split)" ""
+
+# make sure no 'git subtree' tagged commits make it into subproj. (They're
+# meaningless to subproj since one side of the merge refers to the mainline)
+check_equal "$(git log --pretty=format:'%s%n%b' HEAD^2 | grep 'git-subtree.*:')" ""
+
+
+# check if split can find proper base without --onto
+# prepare second pair of repositories
+mkdir test2
+cd test2
+
+mkdir main
+cd main
+git init
+create main1
+git commit -m "main1"
+
+cd ..
+mkdir sub
+cd sub
+git init
+create sub2
+git commit -m "sub2"
+
+cd ../main
+git fetch ../sub master
+git branch sub2 FETCH_HEAD
+git subtree add --prefix subdir sub2
+
+cd ../sub
+create sub3
+git commit -m "sub3"
+
+cd ../main
+git fetch ../sub master
+git branch sub3 FETCH_HEAD
+git subtree merge --prefix subdir sub3
+
+create subdir/main-sub4
+git commit -m "main-sub4"
+git subtree split --prefix subdir --branch mainsub4
+
+# at this point, the new commit's parent should be sub3
+# if it's not, something went wrong (the "newparent" of "master~" commit should have been sub3,
+# but it wasn't, because it's cache was not set to itself)
+check_equal "$(git log --pretty=format:%P -1 mainsub4)" "$(git rev-parse sub3)"
+
+mkdir subdir2
+create subdir2/main-sub5
+git commit -m "main-sub5"
+git subtree split --prefix subdir2 --branch mainsub5
+
+# also test that we still can split out an entirely new subtree
+# if the parent of the first commit in the tree isn't empty,
+# then the new subtree has accidently been attached to something
+check_equal "$(git log --pretty=format:%P -1 mainsub5)" ""
+
+
+# make sure no patch changes more than one file. The original set of commits
+# changed only one file each. A multi-file change would imply that we pruned
+# commits too aggressively.
+joincommits()
+{
+ commit=
+ all=
+ while read x y; do
+ echo "{$x}" >&2
+ if [ -z "$x" ]; then
+ continue
+ elif [ "$x" = "commit:" ]; then
+ if [ -n "$commit" ]; then
+ echo "$commit $all"
+ all=
+ fi
+ commit="$y"
+ else
+ all="$all $y"
+ fi
+ done
+ echo "$commit $all"
+}
+x=
+git log --pretty=format:'commit: %H' | joincommits |
+( while read commit a b; do
+ echo "Verifying commit $commit"
+ check_equal "$b" ""
+ x=1
+ done
+ check_equal "$x" 1
+) || exit 1
+
+echo
+echo 'ok'