#!/bin/sh

global test_description := ''fetch/clone from a shallow clone''

source ./test-lib.sh

proc commit {
	echo $1 >tracked &&
	git add tracked &&
	git commit -m $1
}

test_expect_success 'setup' '
	commit 1 &&
	commit 2 &&
	commit 3 &&
	commit 4 &&
	git config --global transfer.fsckObjects true
'

test_expect_success 'setup shallow clone' '
	git clone --no-local --depth=2 .git shallow &&
	git --git-dir=shallow/.git log --format=%s >actual &&
	cat <<EOF >expect &&
4
3
EOF
	test_cmp expect actual
'

test_expect_success 'clone from shallow clone' '
	git clone --no-local shallow shallow2 &&
	(
	cd shallow2 &&
	git fsck &&
	git log --format=%s >actual &&
	cat <<EOF >expect &&
4
3
EOF
	test_cmp expect actual
	)
'

test_expect_success 'fetch from shallow clone' '
	(
	cd shallow &&
	commit 5
	) &&
	(
	cd shallow2 &&
	git fetch &&
	git fsck &&
	git log --format=%s origin/master >actual &&
	cat <<EOF >expect &&
5
4
3
EOF
	test_cmp expect actual
	)
'

test_expect_success 'fetch --depth from shallow clone' '
	(
	cd shallow &&
	commit 6
	) &&
	(
	cd shallow2 &&
	git fetch --depth=2 &&
	git fsck &&
	git log --format=%s origin/master >actual &&
	cat <<EOF >expect &&
6
5
EOF
	test_cmp expect actual
	)
'

test_expect_success 'fetch --unshallow from shallow clone' '
	(
	cd shallow2 &&
	git fetch --unshallow &&
	git fsck &&
	git log --format=%s origin/master >actual &&
	cat <<EOF >expect &&
6
5
4
3
EOF
	test_cmp expect actual
	)
'

test_expect_success 'fetch something upstream has but hidden by clients shallow boundaries' '
	# the blob "1" is available in .git but hidden by the
	# shallow2/.git/shallow and it should be resent
	! git --git-dir=shallow2/.git cat-file blob $(echo 1|git hash-object --stdin) >/dev/null &&
	echo 1 >1.t &&
	git add 1.t &&
	git commit -m add-1-back &&
	(
	cd shallow2 &&
	git fetch ../.git +refs/heads/master:refs/remotes/top/master &&
	git fsck &&
	git log --format=%s top/master >actual &&
	cat <<EOF >expect &&
add-1-back
4
3
EOF
	test_cmp expect actual
	) &&
	git --git-dir=shallow2/.git cat-file blob $(echo 1|git hash-object --stdin) >/dev/null

'

test_expect_success 'fetch that requires changes in .git/shallow is filtered' '
	(
	cd shallow &&
	git checkout --orphan no-shallow &&
	commit no-shallow
	) &&
	git init notshallow &&
	(
	cd notshallow &&
	git fetch ../shallow/.git refs/heads/*:refs/remotes/shallow/*&&
	git for-each-ref --format="%(refname)" >actual.refs &&
	cat <<EOF >expect.refs &&
refs/remotes/shallow/no-shallow
EOF
	test_cmp expect.refs actual.refs &&
	git log --format=%s shallow/no-shallow >actual &&
	cat <<EOF >expect &&
no-shallow
EOF
	test_cmp expect actual
	)
'

test_expect_success 'fetch --update-shallow' '
	(
	cd shallow &&
	git checkout master &&
	commit 7 &&
	git tag -m foo heavy-tag HEAD^ &&
	git tag light-tag HEAD^:tracked
	) &&
	(
	cd notshallow &&
	git fetch --update-shallow ../shallow/.git refs/heads/*:refs/remotes/shallow/* &&
	git fsck &&
	git for-each-ref --sort=refname --format="%(refname)" >actual.refs &&
	cat <<EOF >expect.refs &&
refs/remotes/shallow/master
refs/remotes/shallow/no-shallow
refs/tags/heavy-tag
refs/tags/light-tag
EOF
	test_cmp expect.refs actual.refs &&
	git log --format=%s shallow/master >actual &&
	cat <<EOF >expect &&
7
6
5
4
3
EOF
	test_cmp expect actual
	)
'

test_expect_success POSIXPERM,SANITY 'shallow fetch from a read-only repo' '
	cp -R .git read-only.git &&
	find read-only.git -print | xargs chmod -w &&
	test_when_finished "find read-only.git -type d -print | xargs chmod +w" &&
	git clone --no-local --depth=2 read-only.git from-read-only &&
	git --git-dir=from-read-only/.git log --format=%s >actual &&
	cat >expect <<EOF &&
add-1-back
4
EOF
	test_cmp expect actual
'

test_done
(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"fetch/clone from a shallow clone">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./test-lib.sh)})
    (FuncDef
      name: commit
      body: 
        (BraceGroup
          children: [
            (AndOr
              children: [
                (SimpleCommand
                  words: [{(echo)} {(DQ ($ VSub_Number "$1"))}]
                  redirects: [(Redir op_id:Redir_Great fd:-1 arg_word:{(tracked)} spids:[28])]
                )
                (AndOr
                  children: [
                    (C {(git)} {(add)} {(tracked)})
                    (C {(git)} {(commit)} {(-m)} {(DQ ($ VSub_Number "$1"))})
                  ]
                  op_id: Op_DAmp
                )
              ]
              op_id: Op_DAmp
            )
          ]
          spids: [19]
        )
      spids: [15 18]
    )
    (C {(test_expect_success)} {(SQ <setup>)} 
      {
        (SQ <"\n"> <"\tcommit 1 &&\n"> <"\tcommit 2 &&\n"> <"\tcommit 3 &&\n"> <"\tcommit 4 &&\n"> 
          <"\tgit config --global transfer.fsckObjects true\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"setup shallow clone">)} 
      {
        (SQ <"\n"> <"\tgit clone --no-local --depth=2 .git shallow &&\n"> 
          <"\tgit --git-dir=shallow/.git log --format=%s >actual &&\n"> <"\tcat <<EOF >expect &&\n"> <"4\n"> <"3\n"> <"EOF\n"> <"\ttest_cmp expect actual\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"clone from shallow clone">)} 
      {
        (SQ <"\n"> <"\tgit clone --no-local shallow shallow2 &&\n"> <"\t(\n"> <"\tcd shallow2 &&\n"> 
          <"\tgit fsck &&\n"> <"\tgit log --format=%s >actual &&\n"> <"\tcat <<EOF >expect &&\n"> <"4\n"> <"3\n"> <"EOF\n"> 
          <"\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"fetch from shallow clone">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\tcd shallow &&\n"> <"\tcommit 5\n"> <"\t) &&\n"> <"\t(\n"> 
          <"\tcd shallow2 &&\n"> <"\tgit fetch &&\n"> <"\tgit fsck &&\n"> <"\tgit log --format=%s origin/master >actual &&\n"> 
          <"\tcat <<EOF >expect &&\n"> <"5\n"> <"4\n"> <"3\n"> <"EOF\n"> <"\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"fetch --depth from shallow clone">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\tcd shallow &&\n"> <"\tcommit 6\n"> <"\t) &&\n"> <"\t(\n"> 
          <"\tcd shallow2 &&\n"> <"\tgit fetch --depth=2 &&\n"> <"\tgit fsck &&\n"> <"\tgit log --format=%s origin/master >actual &&\n"> 
          <"\tcat <<EOF >expect &&\n"> <"6\n"> <"5\n"> <"EOF\n"> <"\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"fetch --unshallow from shallow clone">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\tcd shallow2 &&\n"> <"\tgit fetch --unshallow &&\n"> <"\tgit fsck &&\n"> 
          <"\tgit log --format=%s origin/master >actual &&\n"> <"\tcat <<EOF >expect &&\n"> <"6\n"> <"5\n"> <"4\n"> <"3\n"> <"EOF\n"> <"\ttest_cmp expect actual\n"> 
          <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} 
      {(SQ <"fetch something upstream has but hidden by clients shallow boundaries">)} 
      {
        (SQ <"\n"> <"\t# the blob \"1\" is available in .git but hidden by the\n"> 
          <"\t# shallow2/.git/shallow and it should be resent\n"> <"\t! git --git-dir=shallow2/.git cat-file blob $(echo 1|git hash-object --stdin) >/dev/null &&\n"> 
          <"\techo 1 >1.t &&\n"> <"\tgit add 1.t &&\n"> <"\tgit commit -m add-1-back &&\n"> <"\t(\n"> <"\tcd shallow2 &&\n"> 
          <"\tgit fetch ../.git +refs/heads/master:refs/remotes/top/master &&\n"> <"\tgit fsck &&\n"> <"\tgit log --format=%s top/master >actual &&\n"> <"\tcat <<EOF >expect &&\n"> 
          <"add-1-back\n"> <"4\n"> <"3\n"> <"EOF\n"> <"\ttest_cmp expect actual\n"> <"\t) &&\n"> 
          <
"\tgit --git-dir=shallow2/.git cat-file blob $(echo 1|git hash-object --stdin) >/dev/null\n"
          > <"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"fetch that requires changes in .git/shallow is filtered">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\tcd shallow &&\n"> <"\tgit checkout --orphan no-shallow &&\n"> 
          <"\tcommit no-shallow\n"> <"\t) &&\n"> <"\tgit init notshallow &&\n"> <"\t(\n"> <"\tcd notshallow &&\n"> 
          <"\tgit fetch ../shallow/.git refs/heads/*:refs/remotes/shallow/*&&\n"> <"\tgit for-each-ref --format=\"%(refname)\" >actual.refs &&\n"> <"\tcat <<EOF >expect.refs &&\n"> 
          <"refs/remotes/shallow/no-shallow\n"> <"EOF\n"> <"\ttest_cmp expect.refs actual.refs &&\n"> 
          <"\tgit log --format=%s shallow/no-shallow >actual &&\n"> <"\tcat <<EOF >expect &&\n"> <"no-shallow\n"> <"EOF\n"> <"\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"fetch --update-shallow">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\tcd shallow &&\n"> <"\tgit checkout master &&\n"> <"\tcommit 7 &&\n"> 
          <"\tgit tag -m foo heavy-tag HEAD^ &&\n"> <"\tgit tag light-tag HEAD^:tracked\n"> <"\t) &&\n"> <"\t(\n"> <"\tcd notshallow &&\n"> 
          <"\tgit fetch --update-shallow ../shallow/.git refs/heads/*:refs/remotes/shallow/* &&\n"> <"\tgit fsck &&\n"> <"\tgit for-each-ref --sort=refname --format=\"%(refname)\" >actual.refs &&\n"> 
          <"\tcat <<EOF >expect.refs &&\n"> <"refs/remotes/shallow/master\n"> <"refs/remotes/shallow/no-shallow\n"> <"refs/tags/heavy-tag\n"> 
          <"refs/tags/light-tag\n"> <"EOF\n"> <"\ttest_cmp expect.refs actual.refs &&\n"> 
          <"\tgit log --format=%s shallow/master >actual &&\n"> <"\tcat <<EOF >expect &&\n"> <"7\n"> <"6\n"> <"5\n"> <"4\n"> <"3\n"> <"EOF\n"> 
          <"\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(POSIXPERM) (Lit_Comma ",") (SANITY)} 
      {(SQ <"shallow fetch from a read-only repo">)} 
      {
        (SQ <"\n"> <"\tcp -R .git read-only.git &&\n"> 
          <"\tfind read-only.git -print | xargs chmod -w &&\n"> <"\ttest_when_finished \"find read-only.git -type d -print | xargs chmod +w\" &&\n"> 
          <"\tgit clone --no-local --depth=2 read-only.git from-read-only &&\n"> <"\tgit --git-dir=from-read-only/.git log --format=%s >actual &&\n"> <"\tcat >expect <<EOF &&\n"> 
          <"add-1-back\n"> <"4\n"> <"EOF\n"> <"\ttest_cmp expect actual\n">
        )
      }
    )
    (C {(test_done)})
  ]
)