Update all scripts to use constants, add --version support

lib/constants.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# -----------------------------------------------------------------------------
+# bat-extras | Copyright (C) 2019 eth-p | MIT License
+#
+# Repository: https://github.com/eth-p/bat-extras
+# Issues:     https://github.com/eth-p/bat-extras/issues
+# -----------------------------------------------------------------------------
+EXECUTABLE_BAT="bat"
+PROGRAM="$(basename "$0" .sh)"
+PROGRAM_HOMEPAGE="https://github.com/eth-p/bat-extras"
+PROGRAM_COPYRIGHT="Copyright (C) 2019-2020 eth-p | MIT License"
+PROGRAM_VERSION="$({
+	TOP="$(dirname "$(dirname "${BASH_SOURCE[0]}")")"
+	printf "%s" "$(cat "${TOP}/version.txt" 2>/dev/null || echo "unknown")"
+	if [[ -e "${TOP}/.git" ]]; then
+		printf "%s-git (%s)" "" "$(git -C "${TOP}" rev-parse --short HEAD)"
+	fi
+})"

lib/opt.sh

@@ -5,7 +5,7 @@
 # Repository: https://github.com/eth-p/bat-extras
 # Issues:     https://github.com/eth-p/bat-extras/issues
 # -----------------------------------------------------------------------------
-PROGRAM="$(basename "$0" .sh)"
+source "${LIB}/constants.sh"
 SHIFTOPT_HOOKS=()
 
 # Sets the internal _ARGV, _ARGV_INDEX, and _ARGV_LAST variables used when

lib/opt_hooks.sh

@@ -92,3 +92,21 @@ hook_pager() {
 		esac
 	}
 }
+
+# Option parser hook: --version support.
+# This will accept --version, which prints the version information and exits.
+hook_version() {
+	SHIFTOPT_HOOKS+=("__shiftopt_hook__version")
+	__shiftopt_hook__version() {
+		if [[ "$OPT" = "--version" ]]; then
+			printf "%s %s\n\n%s\n%s\n" \
+				"$PROGRAM" \
+				"$PROGRAM_VERSION" \
+				"$PROGRAM_COPYRIGHT" \
+				"$PROGRAM_HOMEPAGE"
+			exit 0
+		fi
+
+		return 1
+	}
+}

src/batgrep.sh

@@ -8,6 +8,7 @@
 # shellcheck disable=SC1090
 LIB="$(cd "$(dirname "${BASH_SOURCE[0]}")" && cd "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo ".")")/../lib" && pwd)"
 BAT="bat"
+source "${LIB}/constants.sh"
 source "${LIB}/print.sh"
 source "${LIB}/pager.sh"
 source "${LIB}/opt.sh"
@@ -18,6 +19,7 @@ source "${LIB}/version.sh"
 # -----------------------------------------------------------------------------
 hook_color
 hook_pager
+hook_version
 # -----------------------------------------------------------------------------
 # Options:
 # -----------------------------------------------------------------------------

src/batman.sh

@@ -9,6 +9,7 @@
 LIB="$(cd "$(dirname "${BASH_SOURCE[0]}")" && cd "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo ".")")/../lib" && pwd)"
 BAT="bat"
 if [[ -n "${MANPAGER}" ]]; then BAT_PAGER="$MANPAGER"; fi
+source "${LIB}/constants.sh"
 source "${LIB}/pager.sh"
 source "${LIB}/print.sh"
 source "${LIB}/opt.sh"
@@ -16,6 +17,7 @@ source "${LIB}/opt_hooks.sh"
 # -----------------------------------------------------------------------------
 hook_color
 hook_pager
+hook_version
 # -----------------------------------------------------------------------------
 MAN_ARGS=()
 BAT_ARGS=()

src/batwatch.sh

@@ -8,7 +8,7 @@
 # shellcheck disable=SC1090
 LIB="$(cd "$(dirname "${BASH_SOURCE[0]}")" && cd "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo ".")")/../lib" && pwd)"
 BAT="bat"
-DOCS_URL="https://github.com/eth-p/bat-extras/blob/master/doc"
+source "${LIB}/constants.sh"
 source "${LIB}/opt.sh"
 source "${LIB}/opt_hooks.sh"
 source "${LIB}/print.sh"
@@ -18,6 +18,7 @@ source "${LIB}/pager.sh"
 # -----------------------------------------------------------------------------
 hook_color
 hook_pager
+hook_version
 # -----------------------------------------------------------------------------
 # Watchers:
 # -----------------------------------------------------------------------------
@@ -209,7 +210,7 @@ fi
 if [[ -z "$OPT_WATCHER" ]]; then
 	if ! OPT_WATCHER="$(determine_watcher)"; then
 		print_error "Your system does not have any supported watchers."
-		printc "Please read the documentation at %{BLUE}%s%{CLEAR} for more details.\n" "$DOCS_URL/batwatch.md" 1>&2
+		printc "Please read the documentation at %{BLUE}%s%{CLEAR} for more details.\n" "$PROGRAM_HOMEPAGE" 1>&2
 		exit 2
 	fi
 else

src/prettybat.sh

@@ -8,10 +8,16 @@
 # shellcheck disable=SC1090
 LIB="$(cd "$(dirname "${BASH_SOURCE[0]}")" && cd "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo ".")")/../lib" && pwd)"
 BAT="bat"
+source "${LIB}/constants.sh"
 source "${LIB}/opt.sh"
+source "${LIB}/opt_hooks.sh"
 source "${LIB}/str.sh"
 source "${LIB}/print.sh"
 # -----------------------------------------------------------------------------
+# Init:
+# -----------------------------------------------------------------------------
+hook_version
+# -----------------------------------------------------------------------------
 # Formatters:
 # -----------------------------------------------------------------------------
 

test/suite/batgrep.sh

@@ -14,6 +14,12 @@ require_rg() {
 	fi
 }
 
+test:version() {
+	description "Test 'batgrep --version'"
+	snapshot stdout
+	snapshot stderr
+}
+
 test:regular_file() {
 	description "Search for a pattern in a regular file."
 	snapshot stdout