Reverted the DEFINE_SCRIPT_DIR to compatible mode.

It doesn't resolve symlinks -
that's what DEFINE_SCRIPT_DIR_GNU does.

ChangeLog

@@ -1,6 +1,10 @@
 2.8.1 (TBA)
 ------------------
 
+Incompatible changes (minor):
+
+* The `DEFINE_SCRIPT_DIR` macro doesn't resolve symlinks as it started to do so in `2.8.0`, use `DEFINE_SCRIPT_DIR_GNU` if you need the functionality.
+
 New features:
 
 * The help message now contains reference for one-of argument types (#76).
@@ -9,6 +13,7 @@ Bugfixes:
 
 * The environment variables help message has been fixed (#79).
 * The manpage generation works when long description is supplied (#78).
+* The `DEFINE_SCRIPT_DIR` macro doesn't use `readlink -e` any more (#74).
 
 
 2.8.0 (2019-01-26)

bin/argbash

@@ -5,7 +5,7 @@
 # SC2059 Don't use variables in the printf format string.
 
 
-# DEFINE_SCRIPT_DIR()
+# DEFINE_SCRIPT_DIR()_DEFINE_SCRIPT_DIR([],[cd "$(dirname "${BASH_SOURCE[0]}")" && pwd])
 # ARG_POSITIONAL_SINGLE([input],[The input template file (pass '-' for stdin)])
 # ARG_OPTIONAL_SINGLE([output],[o],[Name of the output file (pass '-' for stdout)],[-])
 # ARG_OPTIONAL_SINGLE([type],[t],[Output type to generate],[bash-script])
@@ -232,7 +232,7 @@ handle_passed_args_count
 assign_positional_args 1 "${_positionals[@]}"
 
 # OTHER STUFF GENERATED BY Argbash
-script_dir="$(cd "$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")" && pwd)" || die "Couldn't determine the script's running directory, which probably matters, bailing out" 2
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" || die "Couldn't determine the script's running directory, which probably matters, bailing out" 2
 # Validation of values
 
 
@@ -460,7 +460,7 @@ then
 	# match against suspicious, then inverse match against correct stuff:
 	# #<optional whitespace>\(allowed\|another allowed\|...\)<optional whitespace><opening bracket <or> end of line>
 	# Then, extract all matches (assumed to be alnum chars + '_') from grep and put them in the error msg.
-	grep_output="$(printf "%s" "$output" | grep '^#\s*\(ARG_\|ARGBASH\)' | grep -v '^#\s*\(ARGBASH_SET_INDENT\|ARG_OPTIONAL_SINGLE\|ARG_VERSION\|ARG_VERSION_AUTO\|ARG_HELP\|ARG_OPTIONAL_INCREMENTAL\|ARG_OPTIONAL_REPEATED\|ARG_VERBOSE\|ARG_OPTIONAL_BOOLEAN\|ARG_OPTIONAL_ACTION\|ARG_POSITIONAL_SINGLE\|ARG_POSITIONAL_INF\|ARG_POSITIONAL_MULTI\|ARG_POSITIONAL_DOUBLEDASH\|ARG_OPTION_STACKING\|ARG_RESTRICT_VALUES\|ARG_DEFAULTS_POS\|ARG_LEFTOVERS\|ARGBASH_WRAP\|INCLUDE_PARSING_CODE\|DEFINE_SCRIPT_DIR\|ARGBASH_SET_DELIM\|ARGBASH_GO\|ARGBASH_PREPARE\|ARG_TYPE_GROUP\|ARG_TYPE_GROUP_SET\|ARG_USE_ENV\|ARG_USE_PROG\)\s*\((\|$\)' | sed -e 's/#\s*\([[:alnum:]_]*\).*/\1 /' | tr -d '\n\r')"
+	grep_output="$(printf "%s" "$output" | grep '^#\s*\(ARG_\|ARGBASH\)' | grep -v '^#\s*\(ARGBASH_SET_INDENT\|ARG_OPTIONAL_SINGLE\|ARG_VERSION\|ARG_VERSION_AUTO\|ARG_HELP\|ARG_OPTIONAL_INCREMENTAL\|ARG_OPTIONAL_REPEATED\|ARG_VERBOSE\|ARG_OPTIONAL_BOOLEAN\|ARG_OPTIONAL_ACTION\|ARG_POSITIONAL_SINGLE\|ARG_POSITIONAL_INF\|ARG_POSITIONAL_MULTI\|ARG_POSITIONAL_DOUBLEDASH\|ARG_OPTION_STACKING\|ARG_RESTRICT_VALUES\|ARG_DEFAULTS_POS\|ARG_LEFTOVERS\|ARGBASH_WRAP\|INCLUDE_PARSING_CODE\|DEFINE_SCRIPT_DIR\|DEFINE_SCRIPT_DIR_GNU\|_DEFINE_SCRIPT_DIR\|ARGBASH_SET_DELIM\|ARGBASH_GO\|ARGBASH_PREPARE\|ARG_TYPE_GROUP\|ARG_TYPE_GROUP_SET\|ARG_USE_ENV\|ARG_USE_PROG\)\s*\((\|$\)' | sed -e 's/#\s*\([[:alnum:]_]*\).*/\1 /' | tr -d '\n\r')"
 	test -n "$grep_output" && die "Your script contains possible misspelled Argbash macros: $grep_output" 1
 fi
 if test "$outfname" != '-'

doc/_static/wrapper-output-action.txt

@@ -9,7 +9,7 @@ Contents of '../src' matching '*.m4':
 	collectors.m4: 20 kiB
 	constants.m4: 0 kiB
 	default_settings.m4: 0 kiB
-	docopt.m4: 2 kiB
+	docopt.m4: 3 kiB
 	env_vars.m4: 1 kiB
 	function_generators.m4: 7 kiB
 	list.m4: 5 kiB
@@ -23,8 +23,8 @@ Contents of '../src' matching '*.m4':
 	output-strip-none.m4: 0 kiB
 	output-strip-user-content.m4: 0 kiB
 	progs.m4: 2 kiB
-	stuff.m4: 44 kiB
-	utilities.m4: 10 kiB
+	stuff.m4: 46 kiB
+	utilities.m4: 11 kiB
 	value_validators.m4: 5 kiB
 Contents of '../resources/examples' matching '*.m4':
 	minimal.m4: 0 kiB

doc/guide.rst

@@ -429,10 +429,20 @@ Plus, there are convenience macros:
 * Add a line where the directory where the script is running is stored in an environmental variable:
   ::
 
-     DEFINE_SCRIPT_DIR([variable name (optional, default is script_dir)])
+     DEFINE_SCRIPT_DIR([variable name (optional, default is 'script_dir')])
 
   You can use this variable to e.g. source ``bash`` snippets that are in a known location relative to the script's parent directory.
 
+  ::
+
+     DEFINE_SCRIPT_DIR_GNU([variable name (optional, default is 'script_dir')])
+
+  Does the same as ``DEFINE_SCRIPT_DIR``, but it uses the ``readlink -e`` to determine the real script directory by resolving symlinks.
+
+  .. warning::
+    This command is available only on GNU systems, so be very careful with its usage --- it won't work for OSX users, and for users on non-GNU based Linux distributions (s.a. Alpine Linux).
+    Don't use it unless you need the functionality AND you are sure that the script will be used only on systems with GNU coreutils.
+
 .. _parsing_code:
 
 * Include a file (let's say a ``parse.sh`` file) that is in the same directory during runtime.

docker/Dockerfile.in

@@ -19,7 +19,6 @@ ENV PROGRAM=argbash
 # and coreutils for readlink
 RUN apk add --no-cache \
 	autoconf \
-	coreutils \
 	bash
 
 # Install argbash from sources

resources/Makefile

@@ -3,7 +3,9 @@ NUL =
 # SC2015: Note that A && B || C is not if-then-else. C may run when A is true.
 SHELLCHECK_EXCLUDE_CHECKS_ARGUMENT = -e 2015
 
-SHELLCHECK=$(shell shellcheck -V > /dev/null && echo "shellcheck -x $(SHELLCHECK_EXCLUDE_CHECKS_ARGUMENT)")
+SHELLCHECK = $(shell shellcheck -V > /dev/null && echo "shellcheck -x $(SHELLCHECK_EXCLUDE_CHECKS_ARGUMENT)")
+
+DEFINE_SCRIPT_DIR_FORM ?= DEFINE_SCRIPT_DIR$(shell readlink -e /dev/null > /dev/null && echo "_GNU")
 
 M4_SRC = \
 	../src/output-strip-none.m4 \
@@ -64,6 +66,10 @@ MANPAGE = argbash.1.gz
 $(GENPARSE): ../src/argbash.m4 $(M4_SRC)
 	ARGBASH_INTENDED_DESTINATION="$@" bash $(GENPARSE) $< -o argbash.temp && mv argbash.temp $@
 
+# TODO: Figure out how to use the GNU version of DEFINE_SCRIPT_DIR based on autodetection.
+../src/argbash.m4.script-dir: ../src/argbash.m4
+	sed "s/\\bDEFINE_SCRIPT_DIR\\b/$(DEFINE_SCRIPT_DIR_FORM)/" $< > $@
+
 $(A_INIT): ../src/argbash-init.m4 $(GENPARSE)
 	$(GENPARSE) $< -o $@
 

src/stuff.m4

@@ -88,11 +88,36 @@ dnl
 dnl $1: Name of the holding variable
 dnl Taken from: http://stackoverflow.com/a/246128/592892
 argbash_api([DEFINE_SCRIPT_DIR], [m4_do(
+	[[$0($@)]],
+	[dnl Taken from: http://stackoverflow.com/a/246128/592892
+],
+	[_DEFINE_SCRIPT_DIR([$1], [cd "$(dirname "${BASH_SOURCE[0]}")" && pwd])],
+)])
+
+
+dnl
+dnl Does the same as DEFINE_SCRIPT_DIR, but uses 'readlink -e' to follow symlinks.
+dnl Works only on GNU systems.
+dnl
+dnl $1: Name of the holding variable
+dnl Taken from: http://stackoverflow.com/a/246128/592892
+argbash_api([DEFINE_SCRIPT_DIR_GNU], [m4_do(
+	[[$0($@)]],
+	[dnl Taken from: http://stackoverflow.com/a/246128/592892
+],
+	[_DEFINE_SCRIPT_DIR([$1], [cd "$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")" && pwd])],
+)])
+
+
+dnl
+dnl $1: Name of the holding variable
+dnl $2: Command to find the script dir
+argbash_api([_DEFINE_SCRIPT_DIR], [m4_do(
 	[[$0($@)]],
 	[m4_define([SCRIPT_DIR_DEFINED])],
 	[m4_pushdef([_sciptdir], m4_ifnblank([$1], [[$1]], _DEFAULT_SCRIPTDIR))],
 	[m4_list_append([_OTHER],
-		m4_quote(_sciptdir[="$(cd "$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")" && pwd)" || die "Couldn't determine the script's running directory, which probably matters, bailing out" 2]))],
+		m4_quote(_sciptdir[="$($2)" || die "Couldn't determine the script's running directory, which probably matters, bailing out" 2]))],
 	[m4_popdef([_sciptdir])],
 )])