t/test-lib: wire up NO_ICONV prerequisite

The iconv library is used by Git to reencode files, commit messages and other things. As such it is a rather integral part, but given that many platforms nowadays use UTF-8 everywhere you can live without support for reencoding in many situations. It is thus optional to build Git with iconv, and some of our platforms wired up in "config.mak.uname" disable it. But while we support building without it, running our test suite with "NO_ICONV=Yes" causes many test failures. Wire up a new test prerequisite ICONV that gets populated via our GIT-BUILD-OPTIONS. Annotate failing tests accordingly. Note that this commit does not do a deep dive into every single test to assess whether the failure is expected or not. Most of the tests do smell like the expected kind of failure though. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Taylor Blau <me@ttaylorr.com>
2024-10-16 10:12:53 +02:00 · 2024-10-16 10:12:53 +02:00 · df383b5842
commit df383b5842
parent ed7634ebcc
22 changed files with 227 additions and 104 deletions
--- a/1
+++ b/1
@ -3171,6 +3171,7 @@ GIT-BUILD-OPTIONS: FORCE
 	@echo PYTHON_PATH=\''$(subst ','\'',$(PYTHON_PATH_SQ))'\' >>$@+
 	@echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@+
 	@echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@+
+	@echo NO_ICONV=\''$(subst ','\'',$(subst ','\'',$(NO_ICONV)))'\' >>$@+
 	@echo NO_EXPAT=\''$(subst ','\'',$(subst ','\'',$(NO_EXPAT)))'\' >>$@+
 	@echo USE_LIBPCRE2=\''$(subst ','\'',$(subst ','\'',$(USE_LIBPCRE2)))'\' >>$@+
 	@echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@+
--- a/contrib/buildsystems/CMakeLists.txt
+++ b/contrib/buildsystems/CMakeLists.txt
@ -1109,6 +1109,7 @@ set(DIFF diff)
 set(PYTHON_PATH /usr/bin/python)
 set(TAR tar)
 set(NO_CURL )
+set(NO_ICONV )
 set(NO_EXPAT )
 set(USE_LIBPCRE2 )
 set(NO_PERL )
@ -1122,6 +1123,10 @@ if(NOT CURL_FOUND)
 	set(NO_CURL 1)
 endif()

+if(NOT Iconv_FOUND)
+	SET(NO_ICONV 1)
+endif()
+
 if(NOT EXPAT_FOUND)
 	set(NO_EXPAT 1)
 endif()
@ -1145,6 +1150,7 @@ file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "DIFF='${DIFF}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PYTHON_PATH='${PYTHON_PATH}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "TAR='${TAR}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_CURL='${NO_CURL}'\n")
+file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_ICONV='${NO_ICONV}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_EXPAT='${NO_EXPAT}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PERL='${NO_PERL}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PTHREADS='${NO_PTHREADS}'\n")
--- a/t/t0028-working-tree-encoding.sh
+++ b/t/t0028-working-tree-encoding.sh
@ -12,6 +12,12 @@ TEST_CREATE_REPO_NO_TEMPLATE=1

 GIT_TRACE_WORKING_TREE_ENCODING=1 && export GIT_TRACE_WORKING_TREE_ENCODING

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping working tree encoding tests; iconv not available'
+	test_done
+fi
+
 test_expect_success 'setup test files' '
 	git config core.eol lf &&

--- a/t/t2082-parallel-checkout-attributes.sh
+++ b/t/t2082-parallel-checkout-attributes.sh
@ -34,7 +34,7 @@ test_expect_success 'parallel-checkout with ident' '
 	)
 '

-test_expect_success 'parallel-checkout with re-encoding' '
+test_expect_success ICONV 'parallel-checkout with re-encoding' '
 	set_checkout_config 2 0 &&
 	git init encoding &&
 	(
--- a/t/t3434-rebase-i18n.sh
+++ b/t/t3434-rebase-i18n.sh
@ -20,6 +20,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping rebase i18n tests; iconv not available'
+	test_done
+fi
+
 compare_msg () {
 	iconv -f "$2" -t "$3" "$TEST_DIRECTORY/t3434/$1" >expect &&
 	git cat-file commit HEAD >raw &&
--- a/t/t3900-i18n-commit.sh
+++ b/t/t3900-i18n-commit.sh
@ -8,6 +8,12 @@ test_description='commit and log output encodings'
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping commit i18n tests; iconv not available'
+	test_done
+fi
+
 compare_with () {
 	git show -s $1 | sed -e '1,/^$/d' -e 's/^    //' >current &&
 	case "$3" in
--- a/t/t3901-i18n-patch.sh
+++ b/t/t3901-i18n-patch.sh
@ -11,6 +11,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping patch i18n tests; iconv not available'
+	test_done
+fi
+
 check_encoding () {
 	# Make sure characters are not corrupted
 	cnt="$1" header="$2" i=1 j=0
--- a/t/t4041-diff-submodule-option.sh
+++ b/t/t4041-diff-submodule-option.sh
@ -15,12 +15,18 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

-# Tested non-UTF-8 encoding
-test_encoding="ISO8859-1"
+# Test non-UTF-8 encoding in case iconv is available.
+if test_have_prereq ICONV
+then
+	test_encoding="ISO8859-1"
+	# String "added" in German (translated with Google Translate), encoded in UTF-8,
+	# used in sample commit log messages in add_file() function below.
+	added=$(printf "hinzugef\303\274gt")
+else
+	test_encoding="UTF-8"
+	added="added"
+fi

-# String "added" in German (translated with Google Translate), encoded in UTF-8,
-# used in sample commit log messages in add_file() function below.
-added=$(printf "hinzugef\303\274gt")
 add_file () {
 	(
 		cd "$1" &&
--- a/t/t4059-diff-submodule-not-initialized.sh
+++ b/t/t4059-diff-submodule-not-initialized.sh
@ -12,12 +12,18 @@ initialized previously but the checkout has since been removed.
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

-# Tested non-UTF-8 encoding
-test_encoding="ISO8859-1"

-# String "added" in German (translated with Google Translate), encoded in UTF-8,
-# used in sample commit log messages in add_file() function below.
-added=$(printf "hinzugef\303\274gt")
+# Test non-UTF-8 encoding in case iconv is available.
+if test_have_prereq ICONV
+then
+	test_encoding="ISO8859-1"
+	# String "added" in German (translated with Google Translate), encoded in UTF-8,
+	# used in sample commit log messages in add_file() function below.
+	added=$(printf "hinzugef\303\274gt")
+else
+	test_encoding="UTF-8"
+	added="added"
+fi

 add_file () {
 	(
--- a/t/t4060-diff-submodule-option-diff-format.sh
+++ b/t/t4060-diff-submodule-option-diff-format.sh
@ -13,12 +13,17 @@ This test tries to verify the sanity of --submodule=diff option of git diff.
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

-# Tested non-UTF-8 encoding
-test_encoding="ISO8859-1"
-
-# String "added" in German (translated with Google Translate), encoded in UTF-8,
-# used in sample commit log messages in add_file() function below.
-added=$(printf "hinzugef\303\274gt")
+# Test non-UTF-8 encoding in case iconv is available.
+if test_have_prereq ICONV
+then
+	test_encoding="ISO8859-1"
+	# String "added" in German (translated with Google Translate), encoded in UTF-8,
+	# used in sample commit log messages in add_file() function below.
+	added=$(printf "hinzugef\303\274gt")
+else
+	test_encoding="UTF-8"
+	added="added"
+fi

 add_file () {
 	(
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@ -105,7 +105,7 @@ test_expect_success 'output from user-defined format is re-wrapped' '
 	test_cmp expect log.predictable
 '

-test_expect_success !MINGW 'shortlog wrapping' '
+test_expect_success !MINGW,ICONV 'shortlog wrapping' '
 	cat >expect <<\EOF &&
 A U Thor (5):
      Test
@ -126,13 +126,13 @@ EOF
 	test_cmp expect out
 '

-test_expect_success !MINGW 'shortlog from non-git directory' '
+test_expect_success !MINGW,ICONV 'shortlog from non-git directory' '
 	git log --no-expand-tabs HEAD >log &&
 	GIT_DIR=non-existing git shortlog -w <log >out &&
 	test_cmp expect out
 '

-test_expect_success !MINGW 'shortlog can read --format=raw output' '
+test_expect_success !MINGW,ICONV 'shortlog can read --format=raw output' '
 	git log --format=raw HEAD >log &&
 	GIT_DIR=non-existing git shortlog -w <log >out &&
 	test_cmp expect out
@ -182,7 +182,7 @@ $DSCHO (2):

 EOF

-test_expect_success !MINGW 'shortlog encoding' '
+test_expect_success !MINGW,ICONV 'shortlog encoding' '
 	git reset --hard "$commit" &&
 	git config --unset i18n.commitencoding &&
 	echo 2 > a1 &&
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@ -114,19 +114,19 @@ test_expect_success 'alias loop' '
 	test_must_fail git log --pretty=test-foo
 '

-test_expect_success 'NUL separation' '
+test_expect_success ICONV 'NUL separation' '
 	printf "add bar\0$(commit_msg)" >expected &&
 	git log -z --pretty="format:%s" >actual &&
 	test_cmp expected actual
 '

-test_expect_success 'NUL termination' '
+test_expect_success ICONV 'NUL termination' '
 	printf "add bar\0$(commit_msg)\0" >expected &&
 	git log -z --pretty="tformat:%s" >actual &&
 	test_cmp expected actual
 '

-test_expect_success 'NUL separation with --stat' '
+test_expect_success ICONV 'NUL separation with --stat' '
 	stat0_part=$(git diff --stat HEAD^ HEAD) &&
 	stat1_part=$(git diff-tree --no-commit-id --stat --root HEAD^) &&
 	printf "add bar\n$stat0_part\n\0$(commit_msg)\n$stat1_part\n" >expected &&
@ -181,7 +181,7 @@ test_expect_success 'setup more commits' '
 	head4=$(git rev-parse --verify --short HEAD~3)
 '

-test_expect_success 'left alignment formatting' '
+test_expect_success ICONV 'left alignment formatting' '
 	git log --pretty="tformat:%<(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	message two                            Z
@ -192,7 +192,7 @@ test_expect_success 'left alignment formatting' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left alignment formatting. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	message two                            Z
@ -203,7 +203,7 @@ test_expect_success 'left alignment formatting. i18n.logOutputEncoding' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting at the nth column' '
+test_expect_success ICONV 'left alignment formatting at the nth column' '
 	git log --pretty="tformat:%h %<|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1 message two                    Z
@ -214,7 +214,7 @@ test_expect_success 'left alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting at the nth column' '
+test_expect_success ICONV 'left alignment formatting at the nth column' '
 	COLUMNS=50 git log --pretty="tformat:%h %<|(-10)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1 message two                    Z
@ -225,7 +225,7 @@ test_expect_success 'left alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting at the nth column. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %<|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	$head1 message two                    Z
@ -236,7 +236,7 @@ test_expect_success 'left alignment formatting at the nth column. i18n.logOutput
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with no padding' '
+test_expect_success ICONV 'left alignment formatting with no padding' '
 	git log --pretty="tformat:%<(1)%s" >actual &&
 	cat <<-EOF >expected &&
 	message two
@ -258,7 +258,7 @@ test_expect_success 'left alignment formatting with no padding. i18n.logOutputEn
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with trunc' '
+test_expect_success ICONV 'left alignment formatting with trunc' '
 	git log --pretty="tformat:%<(10,trunc)%s" >actual &&
 	qz_to_tab_space <<-\EOF >expected &&
 	message ..
@ -269,7 +269,7 @@ test_expect_success 'left alignment formatting with trunc' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with trunc. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left alignment formatting with trunc. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,trunc)%s" >actual &&
 	qz_to_tab_space <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	message ..
@ -280,7 +280,7 @@ test_expect_success 'left alignment formatting with trunc. i18n.logOutputEncodin
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with ltrunc' '
+test_expect_success ICONV 'left alignment formatting with ltrunc' '
 	git log --pretty="tformat:%<(10,ltrunc)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	..sage two
@ -291,7 +291,7 @@ test_expect_success 'left alignment formatting with ltrunc' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with ltrunc. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left alignment formatting with ltrunc. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,ltrunc)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	..sage two
@ -302,7 +302,7 @@ test_expect_success 'left alignment formatting with ltrunc. i18n.logOutputEncodi
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with mtrunc' '
+test_expect_success ICONV 'left alignment formatting with mtrunc' '
 	git log --pretty="tformat:%<(10,mtrunc)%s" >actual &&
 	qz_to_tab_space <<-\EOF >expected &&
 	mess.. two
@ -313,7 +313,7 @@ test_expect_success 'left alignment formatting with mtrunc' '
 	test_cmp expected actual
 '

-test_expect_success 'left alignment formatting with mtrunc. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left alignment formatting with mtrunc. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,mtrunc)%s" >actual &&
 	qz_to_tab_space <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	mess.. two
@ -324,7 +324,7 @@ test_expect_success 'left alignment formatting with mtrunc. i18n.logOutputEncodi
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting' '
+test_expect_success ICONV 'right alignment formatting' '
 	git log --pretty="tformat:%>(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	Z                            message two
@ -335,7 +335,7 @@ test_expect_success 'right alignment formatting' '
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting. i18n.logOutputEncoding' '
+test_expect_success ICONV 'right alignment formatting. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%>(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	Z                            message two
@ -346,7 +346,7 @@ test_expect_success 'right alignment formatting. i18n.logOutputEncoding' '
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting at the nth column' '
+test_expect_success ICONV 'right alignment formatting at the nth column' '
 	git log --pretty="tformat:%h %>|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1                      message two
@ -357,7 +357,7 @@ test_expect_success 'right alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting at the nth column' '
+test_expect_success ICONV 'right alignment formatting at the nth column' '
 	COLUMNS=50 git log --pretty="tformat:%h %>|(-10)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1                      message two
@ -368,7 +368,7 @@ test_expect_success 'right alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting at the nth column. i18n.logOutputEncoding' '
+test_expect_success ICONV 'right alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %>|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	$head1                      message two
@ -381,7 +381,7 @@ test_expect_success 'right alignment formatting at the nth column. i18n.logOutpu

 # Note: Space between 'message' and 'two' should be in the same column
 # as in previous test.
-test_expect_success 'right alignment formatting at the nth column with --graph. i18n.logOutputEncoding' '
+test_expect_success ICONV 'right alignment formatting at the nth column with --graph. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --graph --pretty="tformat:%h %>|(40)%s" >actual &&
 	iconv -f utf-8 -t $test_encoding >expected <<-EOF &&
 	* $head1                    message two
@ -392,7 +392,7 @@ test_expect_success 'right alignment formatting at the nth column with --graph.
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting with no padding' '
+test_expect_success ICONV 'right alignment formatting with no padding' '
 	git log --pretty="tformat:%>(1)%s" >actual &&
 	cat <<-EOF >expected &&
 	message two
@ -403,7 +403,7 @@ test_expect_success 'right alignment formatting with no padding' '
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting with no padding and with --graph' '
+test_expect_success ICONV 'right alignment formatting with no padding and with --graph' '
 	git log --graph --pretty="tformat:%>(1)%s" >actual &&
 	cat <<-EOF >expected &&
 	* message two
@ -414,7 +414,7 @@ test_expect_success 'right alignment formatting with no padding and with --graph
 	test_cmp expected actual
 '

-test_expect_success 'right alignment formatting with no padding. i18n.logOutputEncoding' '
+test_expect_success ICONV 'right alignment formatting with no padding. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%>(1)%s" >actual &&
 	cat <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	message two
@ -425,7 +425,7 @@ test_expect_success 'right alignment formatting with no padding. i18n.logOutputE
 	test_cmp expected actual
 '

-test_expect_success 'center alignment formatting' '
+test_expect_success ICONV 'center alignment formatting' '
 	git log --pretty="tformat:%><(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	Z             message two              Z
@ -436,7 +436,7 @@ test_expect_success 'center alignment formatting' '
 	test_cmp expected actual
 '

-test_expect_success 'center alignment formatting. i18n.logOutputEncoding' '
+test_expect_success ICONV 'center alignment formatting. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%><(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	Z             message two              Z
@ -446,7 +446,7 @@ test_expect_success 'center alignment formatting. i18n.logOutputEncoding' '
 	EOF
 	test_cmp expected actual
 '
-test_expect_success 'center alignment formatting at the nth column' '
+test_expect_success ICONV 'center alignment formatting at the nth column' '
 	git log --pretty="tformat:%h %><|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1           message two          Z
@ -457,7 +457,7 @@ test_expect_success 'center alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'center alignment formatting at the nth column' '
+test_expect_success ICONV 'center alignment formatting at the nth column' '
 	COLUMNS=70 git log --pretty="tformat:%h %><|(-30)%s" >actual &&
 	qz_to_tab_space <<-EOF >expected &&
 	$head1           message two          Z
@ -468,7 +468,7 @@ test_expect_success 'center alignment formatting at the nth column' '
 	test_cmp expected actual
 '

-test_expect_success 'center alignment formatting at the nth column. i18n.logOutputEncoding' '
+test_expect_success ICONV 'center alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %><|(40)%s" >actual &&
 	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	$head1           message two          Z
@ -479,7 +479,7 @@ test_expect_success 'center alignment formatting at the nth column. i18n.logOutp
 	test_cmp expected actual
 '

-test_expect_success 'center alignment formatting with no padding' '
+test_expect_success ICONV 'center alignment formatting with no padding' '
 	git log --pretty="tformat:%><(1)%s" >actual &&
 	cat <<-EOF >expected &&
 	message two
@ -493,7 +493,7 @@ test_expect_success 'center alignment formatting with no padding' '
 # save HEAD's SHA-1 digest (with no abbreviations) to use it below
 # as far as the next test amends HEAD
 old_head1=$(git rev-parse --verify HEAD~0)
-test_expect_success 'center alignment formatting with no padding. i18n.logOutputEncoding' '
+test_expect_success ICONV 'center alignment formatting with no padding. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%><(1)%s" >actual &&
 	cat <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	message two
@ -504,7 +504,7 @@ test_expect_success 'center alignment formatting with no padding. i18n.logOutput
 	test_cmp expected actual
 '

-test_expect_success 'left/right alignment formatting with stealing' '
+test_expect_success ICONV 'left/right alignment formatting with stealing' '
 	git commit --amend -m short --author "long long long <long@me.com>" &&
 	git log --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)% an" >actual &&
 	cat <<-\EOF >expected &&
@ -515,7 +515,7 @@ test_expect_success 'left/right alignment formatting with stealing' '
 	EOF
 	test_cmp expected actual
 '
-test_expect_success 'left/right alignment formatting with stealing. i18n.logOutputEncoding' '
+test_expect_success ICONV 'left/right alignment formatting with stealing. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)% an" >actual &&
 	cat <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
 	short long  long long
@ -564,22 +564,38 @@ test_expect_success 'log decoration properly follows tag chain' '
 	git tag -d tag1 &&
 	git commit --amend -m shorter &&
 	git log --no-walk --tags --pretty="%H %d" --decorate=full >actual &&
-	cat <<-EOF >expected &&
-	$head2  (tag: refs/tags/message-one)
-	$old_head1  (tag: refs/tags/message-two)
-	$head1  (tag: refs/tags/tag2)
-	EOF
+	if test_have_prereq ICONV
+	then
+		cat <<-EOF >expected
+		$head2  (tag: refs/tags/message-one)
+		$old_head1  (tag: refs/tags/message-two)
+		$head1  (tag: refs/tags/tag2)
+		EOF
+	else
+		cat <<-EOF >expected
+		$head2  (tag: refs/tags/message-one)
+		$old_head1  (tag: refs/tags/tag2, tag: refs/tags/message-two)
+		EOF
+	fi &&
 	sort -k3 actual >actual1 &&
 	test_cmp expected actual1
 '

 test_expect_success 'clean log decoration' '
 	git log --no-walk --tags --pretty="%H %D" --decorate=full >actual &&
-	cat >expected <<-EOF &&
-	$head2 tag: refs/tags/message-one
-	$old_head1 tag: refs/tags/message-two
-	$head1 tag: refs/tags/tag2
-	EOF
+	if test_have_prereq ICONV
+	then
+		cat <<-EOF >expected
+		$head2 tag: refs/tags/message-one
+		$old_head1 tag: refs/tags/message-two
+		$head1 tag: refs/tags/tag2
+		EOF
+	else
+		cat <<-EOF >expected
+		$head2 tag: refs/tags/message-one
+		$old_head1 tag: refs/tags/tag2, tag: refs/tags/message-two
+		EOF
+	fi &&
 	sort -k3 actual >actual1 &&
 	test_cmp expected actual1
 '
--- a/t/t4210-log-i18n.sh
+++ b/t/t4210-log-i18n.sh
@ -5,6 +5,12 @@ test_description='test log with i18n features'
 TEST_PASSES_SANITIZE_LEAK=true
 . ./lib-gettext.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping log i18n tests; iconv not available'
+	test_done
+fi
+
 # two forms of é
 utf8_e=$(printf '\303\251')
 latin1_e=$(printf '\351')
--- a/t/t4254-am-corrupt.sh
+++ b/t/t4254-am-corrupt.sh
@ -5,6 +5,12 @@ test_description='git am with corrupt input'
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping am encoding corruption tests; iconv not available'
+	test_done
+fi
+
 make_mbox_with_nul () {
 	space=' '
 	q_nul_in_subject=
--- a/t/t5100-mailinfo.sh
+++ b/t/t5100-mailinfo.sh
@ -28,7 +28,12 @@ check_mailinfo () {

 for mail in 00*
 do
-	test_expect_success "mailinfo $mail" '
+	case "$mail" in
+	0004)
+		prereq=ICONV;;
+	esac
+
+	test_expect_success $prereq "mailinfo $mail" '
 		check_mailinfo "$mail" "" &&
 		if test -f "$DATA/msg$mail--scissors"
 		then
@ -56,7 +61,12 @@ test_expect_success 'split box with rfc2047 samples' \

 for mail in rfc2047/00*
 do
-	test_expect_success "mailinfo $mail" '
+	case "$mail" in
+	rfc2047/0001)
+		prereq=ICONV;;
+	esac
+
+	test_expect_success $prereq "mailinfo $mail" '
 		git mailinfo -u "$mail-msg" "$mail-patch" <"$mail" >"$mail-info" &&
 		echo msg &&
 		test_cmp "$DATA/empty" "$mail-msg" &&
--- a/t/t5550-http-fetch-dumb.sh
+++ b/t/t5550-http-fetch-dumb.sh
@ -344,12 +344,12 @@ test_expect_success 'git client shows text/plain with a charset' '
 	grep "this is the error message" stderr
 '

-test_expect_success 'http error messages are reencoded' '
+test_expect_success ICONV 'http error messages are reencoded' '
 	test_must_fail git clone "$HTTPD_URL/error/utf16" 2>stderr &&
 	grep "this is the error message" stderr
 '

-test_expect_success 'reencoding is robust to whitespace oddities' '
+test_expect_success ICONV 'reencoding is robust to whitespace oddities' '
 	test_must_fail git clone "$HTTPD_URL/error/odd-spacing" 2>stderr &&
 	grep "this is the error message" stderr
 '
--- a/t/t6006-rev-list-format.sh
+++ b/t/t6006-rev-list-format.sh
@ -13,21 +13,41 @@ TEST_PASSES_SANITIZE_LEAK=true
 . "$TEST_DIRECTORY"/lib-terminal.sh

 test_tick
-# Tested non-UTF-8 encoding
-test_encoding="ISO8859-1"

-# String "added" in German
-# (translated with Google Translate),
-# encoded in UTF-8, used as a commit log message below.
-added_utf8_part=$(printf "\303\274")
-added_utf8_part_iso88591=$(echo "$added_utf8_part" | iconv -f utf-8 -t $test_encoding)
-added=$(printf "added (hinzugef${added_utf8_part}gt) foo")
-added_iso88591=$(echo "$added" | iconv -f utf-8 -t $test_encoding)
-# same but "changed"
-changed_utf8_part=$(printf "\303\244")
-changed_utf8_part_iso88591=$(echo "$changed_utf8_part" | iconv -f utf-8 -t $test_encoding)
-changed=$(printf "changed (ge${changed_utf8_part}ndert) foo")
-changed_iso88591=$(echo "$changed" | iconv -f utf-8 -t $test_encoding)
+if test_have_prereq ICONV
+then
+	# Tested non-UTF-8 encoding
+	test_encoding="ISO8859-1"
+
+	# String "added" in German
+	# (translated with Google Translate),
+	# encoded in UTF-8, used as a commit log message below.
+	added_utf8_part=$(printf "\303\274")
+	added_utf8_part_iso88591=$(echo "$added_utf8_part" | iconv -f utf-8 -t $test_encoding)
+	added=$(printf "added (hinzugef${added_utf8_part}gt) foo")
+	added_iso88591=$(echo "$added" | iconv -f utf-8 -t $test_encoding)
+	# same but "changed"
+	changed_utf8_part=$(printf "\303\244")
+	changed_utf8_part_iso88591=$(echo "$changed_utf8_part" | iconv -f utf-8 -t $test_encoding)
+	changed=$(printf "changed (ge${changed_utf8_part}ndert) foo")
+	changed_iso88591=$(echo "$changed" | iconv -f utf-8 -t $test_encoding)
+else
+	# Tested non-UTF-8 encoding
+	test_encoding="UTF-8"
+
+	# String "added" in German
+	# (translated with Google Translate),
+	# encoded in UTF-8, used as a commit log message below.
+	added_utf8_part="u"
+	added_utf8_part_iso88591="u"
+	added=$(printf "added (hinzugef${added_utf8_part}gt) foo")
+	added_iso88591="$added"
+	# same but "changed"
+	changed_utf8_part="a"
+	changed_utf8_part_iso88591="a"
+	changed=$(printf "changed (ge${changed_utf8_part}ndert) foo")
+	changed_iso88591="$changed"
+fi

 # Count of char to truncate
 # Number is chosen so, that non-ACSII characters
@ -198,7 +218,7 @@ Thu, 7 Apr 2005 15:13:13 -0700
 1112911993
 EOF

-test_format encoding %e <<EOF
+test_format ICONV encoding %e <<EOF
 commit $head2
 $test_encoding
 commit $head1
@ -374,7 +394,7 @@ test_expect_success 'setup complex body' '
 	head3_short=$(git rev-parse --short $head3)
 '

-test_format complex-encoding %e <<EOF
+test_format ICONV complex-encoding %e <<EOF
 commit $head3
 $test_encoding
 commit $head2
--- a/t/t7102-reset.sh
+++ b/t/t7102-reset.sh
@ -13,21 +13,31 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh

-commit_msg () {
-	# String "modify 2nd file (changed)" partly in German
-	# (translated with Google Translate),
-	# encoded in UTF-8, used as a commit log message below.
-	msg="modify 2nd file (ge\303\244ndert)\n"
-	if test -n "$1"
-	then
-		printf "$msg" | iconv -f utf-8 -t "$1"
-	else
-		printf "$msg"
-	fi
-}
+if test_have_prereq ICONV
+then
+	commit_msg () {
+		# String "modify 2nd file (changed)" partly in German
+		# (translated with Google Translate),
+		# encoded in UTF-8, used as a commit log message below.
+		msg="modify 2nd file (ge\303\244ndert)\n"
+		if test -n "$1"
+		then
+			printf "$msg" | iconv -f utf-8 -t "$1"
+		else
+			printf "$msg"
+		fi
+	}

-# Tested non-UTF-8 encoding
-test_encoding="ISO8859-1"
+	# Tested non-UTF-8 encoding
+	test_encoding="ISO8859-1"
+else
+	commit_msg () {
+		echo "modify 2nd file (geandert)"
+	}
+
+	# Tested non-UTF-8 encoding
+	test_encoding="UTF-8"
+fi

 test_expect_success 'creating initial files and commits' '
 	test_tick &&
--- a/t/t8005-blame-i18n.sh
+++ b/t/t8005-blame-i18n.sh
@ -3,6 +3,12 @@
 test_description='git blame encoding conversion'
 . ./test-lib.sh

+if ! test_have_prereq ICONV
+then
+	skip_all='skipping blame i18n tests; iconv not available'
+	test_done
+fi
+
 . "$TEST_DIRECTORY"/t8005/utf8.txt
 . "$TEST_DIRECTORY"/t8005/euc-japan.txt
 . "$TEST_DIRECTORY"/t8005/sjis.txt
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@ -3676,7 +3676,7 @@ test_expect_success !MINGW 'W: get-mark & empty orphan commit with erroneous thi
 ### series X (other new features)
 ###

-test_expect_success 'X: handling encoding' '
+test_expect_success ICONV 'X: handling encoding' '
 	test_tick &&
 	cat >input <<-INPUT_END &&
 	commit refs/heads/encoding
--- a/t/t9350-fast-export.sh
+++ b/t/t9350-fast-export.sh
@ -125,7 +125,7 @@ test_expect_success 'fast-export --show-original-ids | git fast-import' '
 	test $MUSS = $(git rev-parse --verify refs/tags/muss)
 '

-test_expect_success 'reencoding iso-8859-7' '
+test_expect_success ICONV 'reencoding iso-8859-7' '

 	test_when_finished "git reset --hard HEAD~1" &&
 	test_config i18n.commitencoding iso-8859-7 &&
@ -421,7 +421,7 @@ M 100644 :1 there

 EOF

-test_expect_success 'dropping tag of filtered out object' '
+test_expect_success ICONV 'dropping tag of filtered out object' '
 (
 	cd limit-by-paths &&
 	git fast-export --tag-of-filtered-object=drop mytag -- there > output &&
@ -438,7 +438,7 @@ msg

 EOF

-test_expect_success 'rewriting tag of filtered out object' '
+test_expect_success ICONV 'rewriting tag of filtered out object' '
 (
 	cd limit-by-paths &&
 	git fast-export --tag-of-filtered-object=rewrite mytag -- there > output &&
@ -667,7 +667,7 @@ M 100644 :13 file

 EOF

-test_expect_success 'avoid uninteresting refs' '
+test_expect_success ICONV 'avoid uninteresting refs' '
 	> tmp-marks &&
 	git fast-export --import-marks=tmp-marks \
 		--export-marks=tmp-marks main > /dev/null &&
@ -686,7 +686,7 @@ from :14

 EOF

-test_expect_success 'refs are updated even if no commits need to be exported' '
+test_expect_success ICONV 'refs are updated even if no commits need to be exported' '
 	> tmp-marks &&
 	git fast-export --import-marks=tmp-marks \
 		--export-marks=tmp-marks main > /dev/null &&
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@ -1743,6 +1743,7 @@ esac

 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 test -z "$NO_CURL" && test_set_prereq LIBCURL
+test -z "$NO_ICONV" && test_set_prereq ICONV
 test -z "$NO_PERL" && test_set_prereq PERL
 test -z "$NO_PTHREADS" && test_set_prereq PTHREADS
 test -z "$NO_PYTHON" && test_set_prereq PYTHON