Enhance configure script and other cleanup

- Get rid of Makefile by using configure script to create it fully
- Enhance automation of PROJECT_VERSION
- Fold README and doc/INSTALL into one file
- Try to be more POSIX-like in scripts
- Rename 'package' target to 'dist'
- Drop usage of 'bool'
- Count dirs also while dry-run
- Use dbl quotes in some log msgs

1 files changed, 119 insertions, 14 deletions

diff --git a/configure b/configure
index fea5aeb..419e9a8 100755
--- a/configure
+++ b/configure
@@ -1,16 +1,18 @@
-#!/usr/bin/env sh
+
 set -e
+set -o posix
 
 # See https://www.gnu.org/prep/standards/html_node/Directory-Variables.html
 prefix=/usr/local
 exec_prefix='$(PREFIX)'
 exec_suffix=
 bindir='$(EXEC_PREFIX)/bin'
+verbose=0
 
 
 main() {
     parseArgs "$@"
-    mangleMakefile
+    printMakefile > Makefile
 }
 
 
@@ -19,10 +21,11 @@ printHelp() {
     echo "Example usage:   $0 --prefix /usr/local"
     echo ''
     echo 'Options:'
-    echo '    --prefix <path>      Default "/usr/local"'
-    echo '    --exec-prefix <path> Default "$(PREFIX)"'
-    echo '    --exec-suffix <path> Default <empty>'
-    echo '    --bindir <path>      Default "$(EXEC_PREFIX)/bin"'
+    echo '    --prefix "/usr/local"'
+    echo '    --exec-prefix "$(PREFIX)"'
+    echo '    --exec-suffix ""'
+    echo '    --bindir "$(EXEC_PREFIX)/bin"'
+    echo '    --verbose 0'
     echo ''
 }
 
@@ -31,25 +34,127 @@ parseArgs() {
     # See: https://stackoverflow.com/a/14203146/4415884
     while test $# -gt 0 ; do
         case $1 in
-            --help)        printHelp; exit 1; ;;
+            --help)        printHelp;       exit 1; ;;
             --prefix)      prefix="$2"      shift; shift; ;;
             --exec-prefix) exec_prefix="$2" shift; shift; ;;
             --exec-suffix) exec_suffix="$2" shift; shift; ;;
             --bindir)      bindir="$2"      shift; shift; ;;
+            --verbose)     verbose="$2"     shift; shift; ;;
             *) echo "[ERROR] Unexpected argument: $1"; exit 1 ;;
         esac
     done
+    if test "$verbose" != "0" -a "$verbose" != "1"; then
+        echo "[ERROR] verbose expected to be 0 or 1. But is: $verbose";
+        false;
+    fi
 }
 
 
-mangleMakefile() {
-    sed -i 's;^PREFIX=.*$;PREFIX='"$prefix"';' Makefile
-    sed -i 's;^EXEC_PREFIX=.*$;EXEC_PREFIX='"$exec_prefix"';' Makefile
-    sed -i 's;^EXEC_SUFFIX=.*$;EXEC_SUFFIX='"$exec_suffix"';' Makefile
-    sed -i 's;^BINDIR=.*$;BINDIR='"$bindir"';' Makefile
-}
+printMakefile () {
+    printf '\n'
+    printf '%s\n' '# This file is generated by configure script. Manual changes may be lost'
+    printf '%s\n' '# when calling configure again.'
+    printf '\n'
+    printf '%s\n' 'CC=gcc'
+    printf '%s\n' 'TAR=tar'
+    printf '%s\n' 'MKDIRS=mkdir -p'
+    printf '%s\n' 'RIMRAF=rm -rf'
+    printf '%s\n' 'COPYTO=cp -t'
+    printf '%s\n' "PREFIX=$prefix"
+    printf '%s\n' "EXEC_PREFIX=$exec_prefix"
+    printf '%s\n' "EXEC_SUFFIX=$exec_suffix"
+    printf '%s\n' "BINDIR=$bindir"
 
+    # If PROJECT_VERSION set, use it.
+    # If not, try generate via git describe.
+    # If fails (eg git not avail), create pseudo version using date.
+    printf '%s'   'PROJECT_VERSION=$(shell'
+    printf '%s'   ' ret=$$(git describe --tags 2>/dev/null |sed -E "s;^v;;");'
+    printf '%s'   ' if test -z "$$ret"; then ret=$$(date -u +0.0.0-%Y%m%d.%H%M%S); fi;'
+    printf '%s\n' ' echo "$$ret")'
 
-main "$@"
+    printf '\n'
+    printf '%s'   'CFLAGS= --std=c99'
+    printf '%s'   ' -Wall -Wextra -Werror -fmax-errors=3'
+    printf '%s'   ' -Wno-error=unused-function -Wno-error=unused-label'
+    printf '%s'   ' -Wno-error=unused-variable -Wno-error=unused-parameter'
+    printf '%s'   ' -Wno-error=unused-const-variable'
+    printf '%s'   ' -Werror=implicit-fallthrough=1'
+    printf '%s'   ' -Wno-error=unused-but-set-variable'
+    printf '%s'   ' -Wno-unused-function -Wno-unused-parameter'
+    printf '%s\n' ' -DPROJECT_VERSION=$(PROJECT_VERSION)'
+    printf '%s\n' ''
+    printf '%s\n' 'LDFLAGS= -Wl,--no-demangle,--fatal-warnings'
+    printf '%s\n' ''
+    printf '%s\n' 'INCDIRS= -Isrc/bulk_ln -Isrc/common'
+    printf '%s\n' ''
+    printf '%s\n' 'ifndef NDEBUG'
+    printf '%s\n' '	CFLAGS := $(CFLAGS) -ggdb -O0 -g3'
+    printf '%s\n' 'else'
+    printf '%s\n' '	CFLAGS := $(CFLAGS) -ffunction-sections -fdata-sections -Os "-DNDEBUG=1"'
+    printf '%s\n' '	LDFLAGS := $(LDFLAGS) -Wl,--gc-sections,--as-needed'
+    printf '%s\n' 'endif'
+
+    if test "$verbose" = "0"; then
+        printf '\n'
+        printf '%s\n' '.SILENT:';
+    fi
+
+    printf '\n'
+    printf '%s\n' 'default: link dist'
+
+    printf '\n'
+    printf '%s\n' '.PHONY: clean'
+    printf '%s\n' 'clean:'
+    printf '%s\n' '	echo $(RIMRAF) build dist'
+    printf '%s\n' '	$(RIMRAF) build dist'
+
+    printf '\n'
+    printf '%s\n' '.PHONY: link'
+    printf '%s\n' 'link: build/bin/bulk-ln$(EXEC_SUFFIX)'
+
+    printf '\n'
+    printf '%s\n' 'build/obj/%.o: src/%.c'
+    printf '%s\n' '	echo "  CC    $@"'
+    printf '%s\n' '	$(MKDIRS) "$(shell T=$@; echo $${T%/*})"'
+    printf '%s\n' '	$(CC) -c -o $@ $^ $(CFLAGS) $(INCDIRS)'
 
+    printf '\n'
+    printf '%s'   'build/bin/bulk-ln$(EXEC_SUFFIX):'
+                  # dependencies
+    printf '%s'   ' build/obj/bulk_ln/bulk_ln.o'
+    printf '%s'   ' build/obj/bulk_ln/bulk_ln_main.o'
+    printf '\n'   # commands
+    printf '%s\n' '	echo "  LN    $@"'
+    printf '%s\n' '	$(MKDIRS) "$(shell T=$@; echo $${T%/*})"'
+    printf '%s\n' '	$(CC) -o $@ $(LDFLAGS) $^ $(LIBSDIR)'
 
+    printf '\n'
+    printf '%s\n' '.PHONY: dist'
+    printf '%s\n' 'dist: link'
+    printf '%s\n' '	echo "  Package"'
+    printf '%s\n' '	$(RIMRAF) build/dist-* dist'
+    printf '%s\n' '	$(MKDIRS) dist'
+                  # Create Executable bundle.
+    printf '%s\n' '	$(MKDIRS) build/dist-bin && $(COPYTO) build/dist-bin \'
+    printf '%s\n' '		README.txt'
+    printf '%s\n' '	$(MKDIRS) build/dist-bin/bin && $(COPYTO) build/dist-bin/bin \'
+    printf '%s\n' '		build/bin/*'
+
+    printf '%s\n' '	(cd build/dist-bin && find . -type f -not -name MD5SUM -exec md5sum -b {} +) > build/dist-bin/MD5SUM'
+
+    printf '%s\n' '	(cd build/dist-bin && $(TAR) --owner=0 --group=0 -czf "../../dist/BulkLn-$(PROJECT_VERSION).tgz" *)'
+    printf '%s\n' '	echo "" && echo "See '\''./dist/'\'' for result." && echo ""'
+    printf '%s'   '	if test -n "$$(git status --porcelain 2>/dev/null)"; then'
+    printf '%s'       ' echo "[WARN ] Worktree dirty!"; sleep 2;'
+    printf '%s\n' ' fi'
+
+    printf '\n'
+    printf '%s\n' '.PHONY: install'
+    printf '%s\n' 'install:'
+    printf '%s\n' '	$(MKDIRS) "$(BINDIR)"'
+    printf '%s\n' '	$(TAR) --strip-components=1 -C "$(BINDIR)" -xzf "$(shell ls dist/BulkLn-*.tgz)" -- bin'
+}
+
+
+main "$@"