test-rebase-base: clarify it is about the "--base" flag

It happened several times that people use `test-rebase-base.t` as a general
purposed test file for rebase. But it is intended to be only related to the
`--base` flag. This patch split, renamed the test, and added a note to
clarify.

Differential Revision: https://phab.mercurial-scm.org/D975

tests/test-rebase-base-flag.t

@@ -1,3 +1,6 b''
+Test the "--base" flag of the rebase command. (Tests unrelated to the "--base"
+flag should probably live in somewhere else)
+
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > rebase=
@@ -379,40 +382,3 b' Multiple roots. Two children share two p'
    /
   o  0: A
   
-Rebasing using a single transaction
-
-  $ hg init singletr && cd singletr
-  $ cat >> .hg/hgrc <<EOF
-  > [rebase]
-  > singletransaction=True
-  > EOF
-  $ hg debugdrawdag <<'EOF'
-  >   Z
-  >   |
-  >   | D
-  >   | |
-  >   | C
-  >   | |
-  >   Y B
-  >   |/
-  >   A
-  > EOF
-- We should only see two status stored messages. One from the start, one from
-- the end.
-  $ hg rebase --debug -b D -d Z | grep 'status stored'
-  rebase status stored
-  rebase status stored
-  $ hg tglog
-  o  5: D
-  |
-  o  4: C
-  |
-  o  3: B
-  |
-  o  2: Z
-  |
-  o  1: Y
-  |
-  o  0: A
-  
-  $ cd ..

tests/test-rebase-transaction.t

@@ -10,375 +10,6 b''
   > tglog = log -G --template "{rev}: {desc}"
   > EOF
 
-  $ rebasewithdag() {
-  >   N=`$PYTHON -c "print($N+1)"`
-  >   hg init repo$N && cd repo$N
-  >   hg debugdrawdag
-  >   hg rebase "$@" > _rebasetmp
-  >   r=$?
-  >   grep -v 'saved backup bundle' _rebasetmp
-  >   [ $r -eq 0 ] && hg tglog
-  >   cd ..
-  >   return $r
-  > }
-
-Single branching point, without merge:
-
-  $ rebasewithdag -b D -d Z <<'EOS'
-  >     D E
-  >     |/
-  > Z B C   # C: branching point, E should be picked
-  >  \|/    # B should not be picked
-  >   A
-  >   |
-  >   R
-  > EOS
-  rebasing 3:d6003a550c2c "C" (C)
-  rebasing 5:4526cf523425 "D" (D)
-  rebasing 6:b296604d9846 "E" (E tip)
-  o  6: E
-  |
-  | o  5: D
-  |/
-  o  4: C
-  |
-  o  3: Z
-  |
-  | o  2: B
-  |/
-  o  1: A
-  |
-  o  0: R
-  
-Multiple branching points caused by selecting a single merge changeset:
-
-  $ rebasewithdag -b E -d Z <<'EOS'
-  >     E
-  >    /|
-  >   B C D  # B, C: multiple branching points
-  >   | |/   # D should not be picked
-  > Z | /
-  >  \|/
-  >   A
-  >   |
-  >   R
-  > EOS
-  rebasing 2:c1e6b162678d "B" (B)
-  rebasing 3:d6003a550c2c "C" (C)
-  rebasing 6:54c8f00cb91c "E" (E tip)
-  o    6: E
-  |\
-  | o  5: C
-  | |
-  o |  4: B
-  |/
-  o  3: Z
-  |
-  | o  2: D
-  |/
-  o  1: A
-  |
-  o  0: R
-  
-Rebase should not extend the "--base" revset using "descendants":
-
-  $ rebasewithdag -b B -d Z <<'EOS'
-  >     E
-  >    /|
-  > Z B C  # descendants(B) = B+E. With E, C will be included incorrectly
-  >  \|/
-  >   A
-  >   |
-  >   R
-  > EOS
-  rebasing 2:c1e6b162678d "B" (B)
-  rebasing 5:54c8f00cb91c "E" (E tip)
-  o    5: E
-  |\
-  | o  4: B
-  | |
-  | o  3: Z
-  | |
-  o |  2: C
-  |/
-  o  1: A
-  |
-  o  0: R
-  
-Rebase should not simplify the "--base" revset using "roots":
-
-  $ rebasewithdag -b B+E -d Z <<'EOS'
-  >     E
-  >    /|
-  > Z B C  # roots(B+E) = B. Without E, C will be missed incorrectly
-  >  \|/
-  >   A
-  >   |
-  >   R
-  > EOS
-  rebasing 2:c1e6b162678d "B" (B)
-  rebasing 3:d6003a550c2c "C" (C)
-  rebasing 5:54c8f00cb91c "E" (E tip)
-  o    5: E
-  |\
-  | o  4: C
-  | |
-  o |  3: B
-  |/
-  o  2: Z
-  |
-  o  1: A
-  |
-  o  0: R
-  
-The destination is one of the two branching points of a merge:
-
-  $ rebasewithdag -b F -d Z <<'EOS'
-  >     F
-  >    / \
-  >   E   D
-  >  /   /
-  > Z   C
-  >  \ /
-  >   B
-  >   |
-  >   A
-  > EOS
-  nothing to rebase
-  [1]
-
-Multiple branching points caused by multiple bases (issue5420):
-
-  $ rebasewithdag -b E1+E2+C2+B1 -d Z <<'EOS'
-  >   Z    E2
-  >   |   /
-  >   F E1 C2
-  >   |/  /
-  >   E C1 B2
-  >   |/  /
-  >   C B1
-  >   |/
-  >   B
-  >   |
-  >   A
-  >   |
-  >   R
-  > EOS
-  rebasing 3:a113dbaa660a "B1" (B1)
-  rebasing 5:06ce7b1cc8c2 "B2" (B2)
-  rebasing 6:0ac98cce32d3 "C1" (C1)
-  rebasing 8:781512f5e33d "C2" (C2)
-  rebasing 9:428d8c18f641 "E1" (E1)
-  rebasing 11:e1bf82f6b6df "E2" (E2)
-  o  12: E2
-  |
-  o  11: E1
-  |
-  | o  10: C2
-  | |
-  | o  9: C1
-  |/
-  | o  8: B2
-  | |
-  | o  7: B1
-  |/
-  o  6: Z
-  |
-  o  5: F
-  |
-  o  4: E
-  |
-  o  3: C
-  |
-  o  2: B
-  |
-  o  1: A
-  |
-  o  0: R
-  
-Multiple branching points with multiple merges:
-
-  $ rebasewithdag -b G+P -d Z <<'EOS'
-  > G   H   P
-  > |\ /|   |\
-  > F E D   M N
-  >  \|/|  /| |\
-  > Z C B I J K L
-  >  \|/  |/  |/
-  >   A   A   A
-  > EOS
-  rebasing 2:dc0947a82db8 "C" (C)
-  rebasing 8:4e4f9194f9f1 "D" (D)
-  rebasing 9:03ca77807e91 "E" (E)
-  rebasing 10:afc707c82df0 "F" (F)
-  rebasing 13:690dfff91e9e "G" (G)
-  rebasing 14:2893b886bb10 "H" (H)
-  rebasing 3:08ebfeb61bac "I" (I)
-  rebasing 4:a0a5005cec67 "J" (J)
-  rebasing 5:83780307a7e8 "K" (K)
-  rebasing 6:e131637a1cb6 "L" (L)
-  rebasing 11:d1f6d0c3c7e4 "M" (M)
-  rebasing 12:7aaec6f81888 "N" (N)
-  rebasing 15:325bc8f1760d "P" (P tip)
-  o    15: P
-  |\
-  | o    14: N
-  | |\
-  o \ \    13: M
-  |\ \ \
-  | | | o  12: L
-  | | | |
-  | | o |  11: K
-  | | |/
-  | o /  10: J
-  | |/
-  o /  9: I
-  |/
-  | o    8: H
-  | |\
-  | | | o  7: G
-  | | |/|
-  | | | o  6: F
-  | | | |
-  | | o |  5: E
-  | | |/
-  | o |  4: D
-  | |\|
-  +---o  3: C
-  | |
-  o |  2: Z
-  | |
-  | o  1: B
-  |/
-  o  0: A
-  
-Slightly more complex merge case (mentioned in https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-November/091074.html):
-
-  $ rebasewithdag -b A3+B3 -d Z <<'EOF'
-  > Z     C1    A3     B3
-  > |    /     / \    / \
-  > M3 C0     A1  A2 B1  B2
-  > | /       |   |  |   |
-  > M2        M1  C1 C1  M3
-  > |
-  > M1
-  > |
-  > M0
-  > EOF
-  rebasing 4:8817fae53c94 "C0" (C0)
-  rebasing 6:06ca5dfe3b5b "B2" (B2)
-  rebasing 7:73508237b032 "C1" (C1)
-  rebasing 9:fdb955e2faed "A2" (A2)
-  rebasing 11:4e449bd1a643 "A3" (A3)
-  rebasing 10:0a33b0519128 "B1" (B1)
-  rebasing 12:209327807c3a "B3" (B3 tip)
-  o    12: B3
-  |\
-  | o  11: B1
-  | |
-  | | o    10: A3
-  | | |\
-  | +---o  9: A2
-  | | |
-  | o |  8: C1
-  | | |
-  o | |  7: B2
-  | | |
-  | o |  6: C0
-  |/ /
-  o |  5: Z
-  | |
-  o |  4: M3
-  | |
-  o |  3: M2
-  | |
-  | o  2: A1
-  |/
-  o  1: M1
-  |
-  o  0: M0
-  
-Disconnected graph:
-
-  $ rebasewithdag -b B -d Z <<'EOS'
-  >   B
-  >   |
-  > Z A
-  > EOS
-  nothing to rebase from 112478962961 to 48b9aae0607f
-  [1]
-
-Multiple roots. Roots are ancestors of dest:
-
-  $ rebasewithdag -b B+D -d Z <<'EOF'
-  > D Z B
-  >  \|\|
-  >   C A
-  > EOF
-  rebasing 2:112478962961 "B" (B)
-  rebasing 3:b70f76719894 "D" (D)
-  o  4: D
-  |
-  | o  3: B
-  |/
-  o    2: Z
-  |\
-  | o  1: C
-  |
-  o  0: A
-  
-Multiple roots. One root is not an ancestor of dest:
-
-  $ rebasewithdag -b B+D -d Z <<'EOF'
-  > Z B D
-  >  \|\|
-  >   A C
-  > EOF
-  nothing to rebase from f675d5a1c6a4+b70f76719894 to 262e37e34f63
-  [1]
-
-Multiple roots. One root is not an ancestor of dest. Select using a merge:
-
-  $ rebasewithdag -b E -d Z <<'EOF'
-  >   E
-  >   |\
-  > Z B D
-  >  \|\|
-  >   A C
-  > EOF
-  rebasing 2:f675d5a1c6a4 "B" (B)
-  rebasing 5:f68696fe6af8 "E" (E tip)
-  o    5: E
-  |\
-  | o    4: B
-  | |\
-  | | o  3: Z
-  | | |
-  o | |  2: D
-  |/ /
-  o /  1: C
-   /
-  o  0: A
-  
-Multiple roots. Two children share two parents while dest has only one parent:
-
-  $ rebasewithdag -b B+D -d Z <<'EOF'
-  > Z B D
-  >  \|\|\
-  >   A C A
-  > EOF
-  rebasing 2:f675d5a1c6a4 "B" (B)
-  rebasing 3:c2a779e13b56 "D" (D)
-  o    4: D
-  |\
-  +---o  3: B
-  | |/
-  | o  2: Z
-  | |
-  o |  1: C
-   /
-  o  0: A
-  
 Rebasing using a single transaction
 
   $ hg init singletr && cd singletr