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git/t/t3401-rebase-and-am-rename.sh
Elijah Newren 10cdb9f38a rebase: rename the two primary rebase backends
Two related changes, with separate rationale for each:

Rename the 'interactive' backend to 'merge' because:
  * 'interactive' as a name caused confusion; this backend has been used
    for many kinds of non-interactive rebases, and will probably be used
    in the future for more non-interactive rebases than interactive ones
    given that we are making it the default.
  * 'interactive' is not the underlying strategy; merging is.
  * the directory where state is stored is not called
    .git/rebase-interactive but .git/rebase-merge.

Rename the 'am' backend to 'apply' because:
  * Few users are familiar with git-am as a reference point.
  * Related to the above, the name 'am' makes sentences in the
    documentation harder for users to read and comprehend (they may read
    it as the verb from "I am"); avoiding this difficult places a large
    burden on anyone writing documentation about this backend to be very
    careful with quoting and sentence structure and often forces
    annoying redundancy to try to avoid such problems.
  * Users stumble over pronunciation ("am" as in "I am a person not a
    backend" or "am" as in "the first and thirteenth letters in the
    alphabet in order are "A-M"); this may drive confusion when one user
    tries to explain to another what they are doing.
  * While "am" is the tool driving this backend, the tool driving git-am
    is git-apply, and since we are driving towards lower-level tools
    for the naming of the merge backend we may as well do so here too.
  * The directory where state is stored has never been called
    .git/rebase-am, it was always called .git/rebase-apply.

For all the reasons listed above:
  * Modify the documentation to refer to the backends with the new names
  * Provide a brief note in the documentation connecting the new names
    to the old names in case users run across the old names anywhere
    (e.g. in old release notes or older versions of the documentation)
  * Change the (new) --am command line flag to --apply
  * Rename some enums, variables, and functions to reinforce the new
    backend names for us as well.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00

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#!/bin/sh
test_description='git rebase + directory rename tests'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
test_expect_success 'setup testcase where directory rename should be detected' '
test_create_repo dir-rename &&
(
cd dir-rename &&
mkdir x &&
test_seq 1 10 >x/a &&
test_seq 11 20 >x/b &&
test_seq 21 30 >x/c &&
test_write_lines a b c d e f g h i >l &&
git add x l &&
git commit -m "Initial" &&
git branch O &&
git branch A &&
git branch B &&
git checkout A &&
git mv x y &&
git mv l letters &&
git commit -m "Rename x to y, l to letters" &&
git checkout B &&
echo j >>l &&
test_seq 31 40 >x/d &&
git add l x/d &&
git commit -m "Modify l, add x/d"
)
'
test_expect_success 'rebase --interactive: directory rename detected' '
(
cd dir-rename &&
git checkout B^0 &&
set_fake_editor &&
FAKE_LINES="1" git -c merge.directoryRenames=true rebase --interactive A &&
git ls-files -s >out &&
test_line_count = 5 out &&
test_path_is_file y/d &&
test_path_is_missing x/d
)
'
test_expect_failure 'rebase --apply: directory rename detected' '
(
cd dir-rename &&
git checkout B^0 &&
git -c merge.directoryRenames=true rebase --apply A &&
git ls-files -s >out &&
test_line_count = 5 out &&
test_path_is_file y/d &&
test_path_is_missing x/d
)
'
test_expect_success 'rebase --merge: directory rename detected' '
(
cd dir-rename &&
git checkout B^0 &&
git -c merge.directoryRenames=true rebase --merge A &&
git ls-files -s >out &&
test_line_count = 5 out &&
test_path_is_file y/d &&
test_path_is_missing x/d
)
'
test_expect_failure 'am: directory rename detected' '
(
cd dir-rename &&
git checkout A^0 &&
git format-patch -1 B &&
git -c merge.directoryRenames=true am --3way 0001*.patch &&
git ls-files -s >out &&
test_line_count = 5 out &&
test_path_is_file y/d &&
test_path_is_missing x/d
)
'
test_expect_success 'setup testcase where directory rename should NOT be detected' '
test_create_repo no-dir-rename &&
(
cd no-dir-rename &&
mkdir x &&
test_seq 1 10 >x/a &&
test_seq 11 20 >x/b &&
test_seq 21 30 >x/c &&
echo original >project_info &&
git add x project_info &&
git commit -m "Initial" &&
git branch O &&
git branch A &&
git branch B &&
git checkout A &&
echo v2 >project_info &&
git add project_info &&
git commit -m "Modify project_info" &&
git checkout B &&
mkdir y &&
git mv x/c y/c &&
echo v1 >project_info &&
git add project_info &&
git commit -m "Rename x/c to y/c, modify project_info"
)
'
test_expect_success 'rebase --interactive: NO directory rename' '
test_when_finished "git -C no-dir-rename rebase --abort" &&
(
cd no-dir-rename &&
git checkout B^0 &&
set_fake_editor &&
test_must_fail env FAKE_LINES="1" git rebase --interactive A &&
git ls-files -s >out &&
test_line_count = 6 out &&
test_path_is_file x/a &&
test_path_is_file x/b &&
test_path_is_missing x/c
)
'
test_expect_success 'rebase (am): NO directory rename' '
test_when_finished "git -C no-dir-rename rebase --abort" &&
(
cd no-dir-rename &&
git checkout B^0 &&
set_fake_editor &&
test_must_fail git rebase A &&
git ls-files -s >out &&
test_line_count = 6 out &&
test_path_is_file x/a &&
test_path_is_file x/b &&
test_path_is_missing x/c
)
'
test_expect_success 'rebase --merge: NO directory rename' '
test_when_finished "git -C no-dir-rename rebase --abort" &&
(
cd no-dir-rename &&
git checkout B^0 &&
set_fake_editor &&
test_must_fail git rebase --merge A &&
git ls-files -s >out &&
test_line_count = 6 out &&
test_path_is_file x/a &&
test_path_is_file x/b &&
test_path_is_missing x/c
)
'
test_expect_success 'am: NO directory rename' '
test_when_finished "git -C no-dir-rename am --abort" &&
(
cd no-dir-rename &&
git checkout A^0 &&
git format-patch -1 B &&
test_must_fail git am --3way 0001*.patch &&
git ls-files -s >out &&
test_line_count = 6 out &&
test_path_is_file x/a &&
test_path_is_file x/b &&
test_path_is_missing x/c
)
'
test_done