AC_PREREQ(2.68)

AC_INIT([try], [0.2.0], [https://github.com/binpash/try/issues])

# make sure we're in the right place

AC_CONFIG_SRCDIR([try])

AC_REQUIRE_AUX_FILE([docs/try.1.md])

AC_ARG_ENABLE([utils],

[AS_HELP_STRING([--disable-utils],

[don't compile C utilities for summarizing and committing changes (default is yes)])],

[enable_utils=${enableval}], [enable_utils=yes])

if test "$enable_utils" = "yes"

then

AC_REQUIRE_AUX_FILE([utils/try-commit.c])

# build tools

AC_PROG_CC

# CFLAGS and CPPFLAGGS

if test -z "$CFLAGS"

then

AUTO_CFLAGS="-g -Wall -O2"

else

AUTO_CFLAGS=""

fi

AUTO_CPPFLAGS=""

CFLAGS=${CFLAGS-"$AUTO_CFLAGS"}

CPPFLAGS=${CPPFLAGS-"$AUTO_CPPFLAGS"}

AC_SUBST(CFLAGS)

AC_SUBST(CPPFLAGS)

# needed C types

AC_TYPE_PID_T

AC_TYPE_SIZE_T

AC_TYPE_SSIZE_T

# needed C functions

AC_FUNC_MALLOC

AC_FUNC_REALLOC

AC_FUNC_FORK

AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK

AC_CHECK_HEADERS([fcntl.h unistd.h fts.h])

AC_CHECK_FUNCS([regcomp perror strerror getline getxattr fts_open])

missing_funs=""

for fun in regcomp perror strerror getline getxattr fts_open

do

varname="\$ac_cv_func_$fun"

if test "$(eval "echo ${varname-no}")" != "yes"

then

missing_funs="$missing_funs $fun"

fi

done

if ! test -z "$missing_funs"

then

AC_MSG_NOTICE([

------------------------------------------------------------------------

WARNING:

Some critical functions are missing, so utilities cannot be compiled.

Missing functions:$missing_funs

Continuing as if --disable-utils was passed.

------------------------------------------------------------------------

]);

enable_utils=no

fi

fi

AC_SUBST(enable_utils)

# install

AC_PROG_INSTALL

dnl TRY_REQUIRE_PROG(progname, checking_msg, pre, true_if_failed, post, fail_msg)

AC_DEFUN([TRY_REQUIRE_PROG], [

AC_MSG_CHECKING([ifelse([$2], [], [for $1], [$2])])

$3

if ifelse([$4], [], [! type -p $1 >/dev/null 2>&1], [$4])

then

AC_MSG_RESULT([no])

AC_MSG_ERROR([try needs $1 to work, but ifelse([$6], [], [it could not be found], [$6]).])

else

AC_MSG_RESULT([yes])

$5

fi

])

# symlinks

AC_PROG_LN_S

if test "$LN_S" != "ln -s"

then

AC_MSG_NOTICE([

----------------------------------------------------------------------

WARNING

Your system seems to not have a working implementation of symbolic

links. `try` may behave strangely.

----------------------------------------------------------------------

])

fi

#mktemp

TRY_REQUIRE_PROG([mktemp])

TRY_REQUIRE_PROG([mktemp -d], [whether mktemp -d works], [d=$(mktemp -d 2>/dev/null)], [test "$?" != 0 || ! test -d "$d"], [rmdir "$d"], [your mktemp does not support the -d option])

TRY_REQUIRE_PROG([df])

TRY_REQUIRE_PROG([find])

TRY_REQUIRE_PROG([grep])

TRY_REQUIRE_PROG([findmnt])

TRY_REQUIRE_PROG([sort])

TRY_REQUIRE_PROG([getfattr])

TRY_REQUIRE_PROG([overlayfs],[for overlayfs],[],[! lsmod | grep -q overlay], [], [the overlay module did not appear in the output of lsmod])

AC_CHECK_PROG([mergerfs], [mergerfs], [yes], [no])

AC_CHECK_PROG([unionfs], [unionfs], [yes], [no])

AC_MSG_CHECKING([for union helpers (unionfs or mergerfs)])

if test "$ac_cv_prog_mergerfs" = "no" && test "$ac_cv_prog_unionfs" = "no"

then

AC_MSG_RESULT([no; try may issue warnings and error messages])

else

AC_MSG_RESULT([yes])

fi

TRY_REQUIRE_PROG([readlink])

TRY_REQUIRE_PROG([unshare], [for unshare], [

res=$(unshare --mount --map-root-user --user --pid --fork -- ls $PWD/try 2>/dev/null)

], [

test "$?" != 0 || test "$res" != "$PWD/try"

], [], [could not run unshare])

# for manpages

if test -f man/try.1.gz

then

need_manpage=no

else

need_manpage=yes

fi

AC_ARG_ENABLE([manpage],

[AS_HELP_STRING([--enable-manpage],

[generate the manpage instead of using the cached version (requires pandoc, default is no when man/try.1.gz is present)])],

[enable_manpage=${enableval}], [enable_manpage=${need_manpage}])

if test "$enable_manpage" = "yes"

then

AC_MSG_CHECKING([for pandoc (for manpage)])

if ! type -p pandoc >/dev/null 2>&1

then

AC_MSG_RESULT([no])

enable_manpage="no"

else

AC_MSG_RESULT([yes])

fi

AC_MSG_CHECKING([for gzip (for manpage)])

if ! type -p gzip >/dev/null 2>&1

then

AC_MSG_RESULT([no])

enable_manpage="no"

else

AC_MSG_RESULT([yes])

fi

if test "$enable_manpage" = no

then

if test -f man/try.1.gz

then

AC_MSG_NOTICE([

------------------------------------------------------------------------

WARNING

Your system is missing some programs used to generate the manpage, so

the cached version will be used instead.

------------------------------------------------------------------------

])

else

AC_MSG_ERROR([

------------------------------------------------------------------------

WARNING

Your system is missing some programs used to generate the manpage and

no cached manpage is available.

------------------------------------------------------------------------

])

fi

fi

fi

AC_SUBST(enable_manpage)

# programs just used in tests

missing_test_programs=0

AC_PROG_AWK

AC_MSG_CHECKING([whether awk is gawk (for tests)])

if test "$(stat -L -c %i "$(type -p "$AWK")")" != "$(stat -L -c %i "$(type -p awk)")"

then

AC_MSG_RESULT([no; some tests may behave strangely])

: $((missing_test_programs += 1))

else

AC_MSG_RESULT([yes])

fi

dnl TRY_REQUIRE_PROG(progname)

AC_DEFUN([TRY_TEST_PROG], [

AC_MSG_CHECKING([for $1 (for tests)])

if ! type -p $1 >/dev/null 2>&1

then

AC_MSG_RESULT([no; some tests may fail])

: $((missing_test_programs += 1))

else

AC_MSG_RESULT([yes])

fi

])

TRY_TEST_PROG([expect])

TRY_TEST_PROG([curl])

TRY_TEST_PROG([diff])

TRY_TEST_PROG([touch])

TRY_TEST_PROG([gunzip])

if test "$missing_test_programs" -ne 0

then

AC_MSG_NOTICE([

------------------------------------------------------------------------

WARNING

Your system is missing some programs used in tests, so some tests may

fail.

------------------------------------------------------------------------

])

fi

AC_CONFIG_FILES([Makefile:Makefile.in])

AC_OUTPUT

cat <<EOF

------------------------------------------------------------------------

${PACKAGE_NAME} version ${PACKAGE_VERSION}

Prefix: ${prefix}

Compiling utilities: $enable_utils

To build and install, run:

make && make install

------------------------------------------------------------------------

EOF