Originally, we would use "VAR=VAL command" to execute a test command with
environment variable(s) only for that command. This does not work for commands
that are shell functions (most notably test functions like "test_must_fail");
the result of the assignment is retained and affects later commands.

To avoid this, we assigned and exported the environment variables and run
the test(s) in a subshell like this,

        (
                VAR=VAL &&
                export VAR
                test_must_fail git command to be tested
        )

Using the "env" utility, we should be able to say

        test_must_fail git command to be tested

which is much short and easier to read.

Signed-off-by: David Tran <unsignedz...@gmail.com>

---

>>Let's see if I replied correctly with send-email. Retrying this again.
>>How do I 'reply' to a thread using send-email?
>Look for --in-reply-to option in "man git-send-email".
Git prompts me for this but I don't know what to type. I tried typing just
the id, like 244379 and that didn't work. I guess I'll try
244...@gmane.comp.version-control.git? Google didn't bring many results on
how to use it but many results of what it is and its goal.

>Isn't GIT_CONFIG here another way of saying:
>
>       test_must_fail git config -f doesnotexist --list
>
>Perhaps that is shorter and more readable still (and there are a few
>similar cases in this patch.
I'll ignore this for now. If needed I can make another patch to resolve this.

Hopefully this should be all of it.

I am David Tran a graduating CS/Math senior from Sonoma State University,
United States. I would like to work with git for GSoC'14, specifically the line
options for git rebase --interactive [1][2]. I have used git for a few years and
know how destructive but important rebase is to git. I have created a few shell
scripts here and there to make life using bash/zsh easier. I would like to
apply these skills and work with the best.

Github: unsignedzero

[1]: http://thread.gmane.org/gmane.comp.version-control.git/243933/focus=243967
[2]: http://thread.gmane.org/gmane.comp.version-control.git/242701

Signed-off-by: David Tran <unsignedz...@gmail.com>
---
 t/t1300-repo-config.sh        |   17 ++--------
 t/t1510-repo-setup.sh         |    4 +--
 t/t3200-branch.sh             |   12 +------
 t/t3301-notes.sh              |   22 +++---------
 t/t3404-rebase-interactive.sh |   69 ++++++++---------------------------------
 t/t3413-rebase-hook.sh        |    6 +---
 t/t4014-format-patch.sh       |   14 ++------
 t/t5305-include-tag.sh        |    4 +--
 t/t5602-clone-remote-exec.sh  |   13 ++------
 t/t5801-remote-helpers.sh     |    6 +--
 t/t6006-rev-list-format.sh    |    9 ++---
 t/t7006-pager.sh              |   18 ++---------
 12 files changed, 42 insertions(+), 152 deletions(-)

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index c9c426c..3e3f77b 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -974,24 +974,15 @@ test_expect_success SYMLINKS 'symlinked configuration' '
 '

 test_expect_success 'nonexistent configuration' '
-       (
-               GIT_CONFIG=doesnotexist &&
-               export GIT_CONFIG &&
-               test_must_fail git config --list &&
-               test_must_fail git config test.xyzzy
-       )
+       test_must_fail env GIT_CONFIG=doesnotexist git config --list &&
+       test_must_fail env GIT_CONFIG=doesnotexist git config test.xyzzy
 '

 test_expect_success SYMLINKS 'symlink to nonexistent configuration' '
        ln -s doesnotexist linktonada &&
        ln -s linktonada linktolinktonada &&
-       (
-               GIT_CONFIG=linktonada &&
-               export GIT_CONFIG &&
-               test_must_fail git config --list &&
-               GIT_CONFIG=linktolinktonada &&
-               test_must_fail git config --list
-       )
+       test_must_fail env GIT_CONFIG=linktonada git config --list &&
+       test_must_fail env GIT_CONFIG=linktolinktonada git config --list
 '

 test_expect_success 'check split_cmdline return' "
diff --git a/t/t1510-repo-setup.sh b/t/t1510-repo-setup.sh
index cf2ee78..e1b2a99 100755
--- a/t/t1510-repo-setup.sh
+++ b/t/t1510-repo-setup.sh
@@ -777,9 +777,7 @@ test_expect_success '#30: core.worktree and core.bare 
conflict (gitfile version)
        setup_repo 30 "$here/30" gitfile true &&
        (
                cd 30 &&
-               GIT_DIR=.git &&
-               export GIT_DIR &&
-               test_must_fail git symbolic-ref HEAD 2>result
+               test_must_fail env GIT_DIR=.git git symbolic-ref HEAD 2>result
        ) &&
        grep "core.bare and core.worktree" 30/result
 '
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index fcdb867..d45e95c 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -849,11 +849,7 @@ test_expect_success 'detect typo in branch name when using 
--edit-description' '
        write_script editor <<-\EOF &&
                echo "New contents" >"$1"
        EOF
-       (
-               EDITOR=./editor &&
-               export EDITOR &&
-               test_must_fail git branch --edit-description no-such-branch
-       )
+       test_must_fail env EDITOR=./editor git branch --edit-description 
no-such-branch
 '

 test_expect_success 'refuse --edit-description on unborn branch for now' '
@@ -861,11 +857,7 @@ test_expect_success 'refuse --edit-description on unborn 
branch for now' '
                echo "New contents" >"$1"
        EOF
        git checkout --orphan unborn &&
-       (
-               EDITOR=./editor &&
-               export EDITOR &&
-               test_must_fail git branch --edit-description
-       )
+       test_must_fail env EDITOR=./editor git branch --edit-description
 '

 test_expect_success '--merged catches invalid object names' '
diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh
index 3bb79a4..cfd67ff 100755
--- a/t/t3301-notes.sh
+++ b/t/t3301-notes.sh
@@ -17,7 +17,7 @@ GIT_EDITOR=./fake_editor.sh
 export GIT_EDITOR

 test_expect_success 'cannot annotate non-existing HEAD' '
-       (MSG=3 && export MSG && test_must_fail git notes add)
+       test_must_fail env MSG=3 git notes add
 '

 test_expect_success setup '
@@ -32,22 +32,16 @@ test_expect_success setup '
 '

 test_expect_success 'need valid notes ref' '
-       (MSG=1 GIT_NOTES_REF=/ && export MSG GIT_NOTES_REF &&
-        test_must_fail git notes add) &&
-       (MSG=2 GIT_NOTES_REF=/ && export MSG GIT_NOTES_REF &&
-        test_must_fail git notes show)
+       test_must_fail env MSG=1 GIT_NOTES_REF=/ git notes show &&
+       test_must_fail env MSG=2 GIT_NOTES_REF=/ git notes show
 '

 test_expect_success 'refusing to add notes in refs/heads/' '
-       (MSG=1 GIT_NOTES_REF=refs/heads/bogus &&
-        export MSG GIT_NOTES_REF &&
-        test_must_fail git notes add)
+       test_must_fail env MSG=1 GIT_NOTES_REF=refs/heads/bogus git notes add
 '

 test_expect_success 'refusing to edit notes in refs/remotes/' '
-       (MSG=1 GIT_NOTES_REF=refs/remotes/bogus &&
-        export MSG GIT_NOTES_REF &&
-        test_must_fail git notes edit)
+       test_must_fail env MSG=1 GIT_NOTES_REF=refs/heads/bogus git notes edit
 '

 # 1 indicates caught gracefully by die, 128 means git-show barked
@@ -865,11 +859,7 @@ test_expect_success 'create note from non-existing note 
with "git notes add -c"
        git add a10 &&
        test_tick &&
        git commit -m 10th &&
-       (
-               MSG="yet another note" &&
-               export MSG &&
-               test_must_fail git notes add -c deadbeef
-       ) &&
+       test_must_fail env MSG="yet another note" git notes add -c deadbeef &&
        test_must_fail git notes list HEAD
 '

diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 50e22b1..c0023a5 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -102,12 +102,8 @@ test_expect_success 'rebase -i with the exec command runs 
from tree root' '

 test_expect_success 'rebase -i with the exec command checks tree cleanness' '
        git checkout master &&
-       (
        set_fake_editor &&
-       FAKE_LINES="exec_echo_foo_>file1 1" &&
-       export FAKE_LINES &&
-       test_must_fail git rebase -i HEAD^
-       ) &&
+       test_must_fail env FAKE_LINES="exec_echo_foo_>file1 1" git rebase -i 
HEAD^ &&
        test_cmp_rev master^ HEAD &&
        git reset --hard &&
        git rebase --continue
@@ -116,12 +112,9 @@ test_expect_success 'rebase -i with the exec command 
checks tree cleanness' '
 test_expect_success 'rebase -i with exec of inexistent command' '
        git checkout master &&
        test_when_finished "git rebase --abort" &&
-       (
        set_fake_editor &&
-       FAKE_LINES="exec_this-command-does-not-exist 1" &&
-       export FAKE_LINES &&
-       test_must_fail git rebase -i HEAD^ >actual 2>&1
-       ) &&
+       test_must_fail env FAKE_LINES="exec_this-command-does-not-exist 1" \
+       git rebase -i HEAD^ >actual 2>&1 &&
        ! grep "Maybe git-rebase is broken" actual
 '

@@ -375,11 +368,7 @@ test_expect_success 'commit message used after conflict' '
        git checkout -b conflict-fixup conflict-branch &&
        base=$(git rev-parse HEAD~4) &&
        set_fake_editor &&
-       (
-               FAKE_LINES="1 fixup 3 fixup 4" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i $base
-       ) &&
+       test_must_fail env FAKE_LINES="1 fixup 3 fixup 4" git rebase -i $base &&
        echo three > conflict &&
        git add conflict &&
        FAKE_COMMIT_AMEND="ONCE" EXPECT_HEADER_COUNT=2 \
@@ -394,11 +383,7 @@ test_expect_success 'commit message retained after 
conflict' '
        git checkout -b conflict-squash conflict-branch &&
        base=$(git rev-parse HEAD~4) &&
        set_fake_editor &&
-       (
-               FAKE_LINES="1 fixup 3 squash 4" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i $base
-       ) &&
+       test_must_fail env FAKE_LINES="1 fixup 3 squash 4" git rebase -i $base 
&&
        echo three > conflict &&
        git add conflict &&
        FAKE_COMMIT_AMEND="TWICE" EXPECT_HEADER_COUNT=2 \
@@ -469,11 +454,7 @@ test_expect_success 'interrupted squash works as expected' 
'
        git checkout -b interrupted-squash conflict-branch &&
        one=$(git rev-parse HEAD~3) &&
        set_fake_editor &&
-       (
-               FAKE_LINES="1 squash 3 2" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i HEAD~3
-       ) &&
+       test_must_fail env FAKE_LINES="1 squash 3 2" git rebase -i HEAD~3 &&
        (echo one; echo two; echo four) > conflict &&
        git add conflict &&
        test_must_fail git rebase --continue &&
@@ -487,11 +468,7 @@ test_expect_success 'interrupted squash works as expected 
(case 2)' '
        git checkout -b interrupted-squash2 conflict-branch &&
        one=$(git rev-parse HEAD~3) &&
        set_fake_editor &&
-       (
-               FAKE_LINES="3 squash 1 2" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i HEAD~3
-       ) &&
+       test_must_fail env FAKE_LINES="3 squash 1 2" git rebase -i HEAD~3 &&
        (echo one; echo four) > conflict &&
        git add conflict &&
        test_must_fail git rebase --continue &&
@@ -528,11 +505,7 @@ test_expect_success 'aborted --continue does not squash 
commits after "edit"' '
        FAKE_LINES="edit 1" git rebase -i HEAD^ &&
        echo "edited again" > file7 &&
        git add file7 &&
-       (
-               FAKE_COMMIT_MESSAGE=" " &&
-               export FAKE_COMMIT_MESSAGE &&
-               test_must_fail git rebase --continue
-       ) &&
+       test_must_fail env FAKE_COMMIT_MESSAGE=" " git rebase --continue &&
        test $old = $(git rev-parse HEAD) &&
        git rebase --abort
 '
@@ -547,11 +520,7 @@ test_expect_success 'auto-amend only edited commits after 
"edit"' '
        echo "and again" > file7 &&
        git add file7 &&
        test_tick &&
-       (
-               FAKE_COMMIT_MESSAGE="and again" &&
-               export FAKE_COMMIT_MESSAGE &&
-               test_must_fail git rebase --continue
-       ) &&
+       test_must_fail env FAKE_COMMIT_MESSAGE="and again" git rebase 
--continue &&
        git rebase --abort
 '

@@ -559,11 +528,7 @@ test_expect_success 'clean error after failed "exec"' '
        test_tick &&
        test_when_finished "git rebase --abort || :" &&
        set_fake_editor &&
-       (
-               FAKE_LINES="1 exec_false" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i HEAD^
-       ) &&
+       test_must_fail env FAKE_LINES="1 exec_false" git rebase -i HEAD^ &&
        echo "edited again" > file7 &&
        git add file7 &&
        test_must_fail git rebase --continue 2>error &&
@@ -947,12 +912,8 @@ test_expect_success 'rebase -i --root retain root commit 
author and message' '

 test_expect_success 'rebase -i --root temporary sentinel commit' '
        git checkout B &&
-       (
-               set_fake_editor &&
-               FAKE_LINES="2" &&
-               export FAKE_LINES &&
-               test_must_fail git rebase -i --root
-       ) &&
+       set_fake_editor &&
+       test_must_fail env FAKE_LINES="2" git rebase -i --root &&
        git cat-file commit HEAD | grep "^tree 4b825dc642cb" &&
        git rebase --abort
 '
@@ -1042,11 +1003,7 @@ test_expect_success 'rebase -i error on commits with \ 
in message' '
        test_when_finished "git rebase --abort; git reset --hard $current_head; 
rm -f error" &&
        test_commit TO-REMOVE will-conflict old-content &&
        test_commit "\temp" will-conflict new-content dummy &&
-       (
-       EDITOR=true &&
-       export EDITOR &&
-       test_must_fail git rebase -i HEAD^ --onto HEAD^^ 2>error
-       ) &&
+       test_must_fail env EDITOR=true git rebase -i HEAD^ --onto HEAD^^ 
2>error &&
        test_expect_code 1 grep  "      emp" error
 '

diff --git a/t/t3413-rebase-hook.sh b/t/t3413-rebase-hook.sh
index 098b755..b6833e9 100755
--- a/t/t3413-rebase-hook.sh
+++ b/t/t3413-rebase-hook.sh
@@ -118,11 +118,7 @@ test_expect_success 'pre-rebase hook stops rebase (1)' '
 test_expect_success 'pre-rebase hook stops rebase (2)' '
        git checkout test &&
        git reset --hard side &&
-       (
-               EDITOR=:
-               export EDITOR
-               test_must_fail git rebase -i master
-       ) &&
+       test_must_fail env EDITOR=: git rebase -i master &&
        test "z$(git symbolic-ref HEAD)" = zrefs/heads/test &&
        test 0 = $(git rev-list HEAD...side | wc -l)
 '
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 73194b2..9c80633 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -764,22 +764,14 @@ test_expect_success 'format-patch --signature="" 
suppresses signatures' '

 test_expect_success TTY 'format-patch --stdout paginates' '
        rm -f pager_used &&
-       (
-               GIT_PAGER="wc >pager_used" &&
-               export GIT_PAGER &&
-               test_terminal git format-patch --stdout --all
-       ) &&
+       test_terminal env GIT_PAGER="wc >pager_used" git format-patch --stdout 
--all &&
        test_path_is_file pager_used
 '

  test_expect_success TTY 'format-patch --stdout pagination can be disabled' '
        rm -f pager_used &&
-       (
-               GIT_PAGER="wc >pager_used" &&
-               export GIT_PAGER &&
-               test_terminal git --no-pager format-patch --stdout --all &&
-               test_terminal git -c "pager.format-patch=false" format-patch 
--stdout --all
-       ) &&
+       test_terminal env GIT_PAGER="wc >pager_used" git --no-pager 
format-patch --stdout --all &&
+       test_terminal env GIT_PAGER="wc >pager_used" git -c 
"pager.format-patch=false" format-patch --stdout --all &&
        test_path_is_missing pager_used &&
        test_path_is_missing .git/pager_used
 '
diff --git a/t/t5305-include-tag.sh b/t/t5305-include-tag.sh
index b061864..21517c7 100755
--- a/t/t5305-include-tag.sh
+++ b/t/t5305-include-tag.sh
@@ -45,9 +45,7 @@ test_expect_success 'unpack objects' '
 test_expect_success 'check unpacked result (have commit, no tag)' '
        git rev-list --objects $commit >list.expect &&
        (
-               GIT_DIR=clone.git &&
-               export GIT_DIR &&
-               test_must_fail git cat-file -e $tag &&
+               test_must_fail env GIT_DIR=clone.git git cat-file -e $tag &&
                git rev-list --objects $commit
        ) >list.actual &&
        test_cmp list.expect list.actual
diff --git a/t/t5602-clone-remote-exec.sh b/t/t5602-clone-remote-exec.sh
index 3f353d9..cbcceab 100755
--- a/t/t5602-clone-remote-exec.sh
+++ b/t/t5602-clone-remote-exec.sh
@@ -12,21 +12,14 @@ test_expect_success setup '
 '

 test_expect_success 'clone calls git upload-pack unqualified with no -u 
option' '
-       (
-               GIT_SSH=./not_ssh &&
-               export GIT_SSH &&
-               test_must_fail git clone localhost:/path/to/repo junk
-       ) &&
+       test_must_fail env GIT_SSH=./not_ssh git clone localhost:/path/to/repo 
junk &&
        echo "localhost git-upload-pack '\''/path/to/repo'\''" >expected &&
        test_cmp expected not_ssh_output
 '

 test_expect_success 'clone calls specified git upload-pack with -u option' '
-       (
-               GIT_SSH=./not_ssh &&
-               export GIT_SSH &&
-               test_must_fail git clone -u ./something/bin/git-upload-pack 
localhost:/path/to/repo junk
-       ) &&
+       test_must_fail env GIT_SSH=./not_ssh \
+               git clone -u ./something/bin/git-upload-pack 
localhost:/path/to/repo junk &&
        echo "localhost ./something/bin/git-upload-pack '\''/path/to/repo'\''" 
>expected &&
        test_cmp expected not_ssh_output
 '
diff --git a/t/t5801-remote-helpers.sh b/t/t5801-remote-helpers.sh
index 613f69a..ca19838 100755
--- a/t/t5801-remote-helpers.sh
+++ b/t/t5801-remote-helpers.sh
@@ -218,10 +218,8 @@ test_expect_success 'proper failure checks for fetching' '
 '

 test_expect_success 'proper failure checks for pushing' '
-       (GIT_REMOTE_TESTGIT_FAILURE=1 &&
-       export GIT_REMOTE_TESTGIT_FAILURE &&
-       cd local &&
-       test_must_fail git push --all
+       (cd local &&
+       test_must_fail env GIT_REMOTE_TESTGIT_FAILURE=1 git push --all
        )
 '

diff --git a/t/t6006-rev-list-format.sh b/t/t6006-rev-list-format.sh
index 9874403..9d9d9de 100755
--- a/t/t6006-rev-list-format.sh
+++ b/t/t6006-rev-list-format.sh
@@ -190,12 +190,9 @@ test_expect_success '%C(auto) respects --no-color' '
 '

 test_expect_success TTY '%C(auto) respects --color=auto (stdout is tty)' '
-       (
-               TERM=vt100 && export TERM &&
-               test_terminal \
-                       git log --format=$AUTO_COLOR -1 --color=auto >actual &&
-               has_color actual
-       )
+       test_terminal env TERM=vt100 \
+               git log --format=$AUTO_COLOR -1 --color=auto >actual &&
+       has_color actual
 '

 test_expect_success '%C(auto) respects --color=auto (stdout not tty)' '
diff --git a/t/t7006-pager.sh b/t/t7006-pager.sh
index b9365b4..da958a8 100755
--- a/t/t7006-pager.sh
+++ b/t/t7006-pager.sh
@@ -146,11 +146,7 @@ test_expect_success 'no color when stdout is a regular 
file' '
 test_expect_success TTY 'color when writing to a pager' '
        rm -f paginated.out &&
        test_config color.ui auto &&
-       (
-               TERM=vt100 &&
-               export TERM &&
-               test_terminal git log
-       ) &&
+       test_terminal env TERM=vt100 git log &&
        colorful paginated.out
 '

@@ -158,11 +154,7 @@ test_expect_success TTY 'colors are suppressed by 
color.pager' '
        rm -f paginated.out &&
        test_config color.ui auto &&
        test_config color.pager false &&
-       (
-               TERM=vt100 &&
-               export TERM &&
-               test_terminal git log
-       ) &&
+       test_terminal env TERM=vt100 git log &&
        ! colorful paginated.out
 '

@@ -181,11 +173,7 @@ test_expect_success 'color when writing to a file intended 
for a pager' '
 test_expect_success TTY 'colors are sent to pager for external commands' '
        test_config alias.externallog "!git log" &&
        test_config color.ui auto &&
-       (
-               TERM=vt100 &&
-               export TERM &&
-               test_terminal git -p externallog
-       ) &&
+       test_terminal env TERM=vt100 git -p externallog &&
        colorful paginated.out
 '

--
1.7.9

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