Automate release process a bit

Makefile

@@ -10,13 +10,17 @@ else
 	MAGIC_DB := /usr/share/misc/magic.mgc
 endif
 
+pistol: build
+
 build:
 	go build -ldflags "-X 'main.Version=$(VERSION)'" ./cmd/pistol
+
 build-static:
-	@echo copying magic db for compilation from:
-	@echo "    $(MAGIC_DB)"
-	@cp --no-preserve=mode,ownership -f $(MAGIC_DB) ./cmd/pistol/magic.mgc
-	go build -tags EMBED_MAGIC_DB -ldflags "-X 'main.Version=$(VERSION)'" ./cmd/pistol
+	nix build -L ".#pistol-static"
+	ldd ./result/bin/pistol 2>&1 | grep -q 'not a dynamic executable'
+
+release:
+	./bump-version.sh
 
 # Manpage
 pistol.1: README.adoc
@@ -78,14 +82,4 @@ test: pistol
 	@echo -------------------
 	@./pistol --config tests/config tests/multi-extra A B
 
-deps:
-	go get github.com/c4milo/github-release
-	go get github.com/mitchellh/gox
-
-changelog:
-	@latest_tag=$$(git describe --tags `git rev-list --tags --max-count=1`); \
-	comparison="$$latest_tag..HEAD"; \
-	if [ -z "$$latest_tag" ]; then comparison=""; fi; \
-	git --no-pager log $$comparison --oneline --no-merges
-
 .PHONY: build install changelog

bump-version.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+# Thanks goes to @pete-otaqui for the initial gist:
+# https://gist.github.com/pete-otaqui/4188238
+#
+# Original version modified by Marek Suscak
+#
+# works with a file called VERSION in the current directory,
+# the contents of which should be a semantic version number
+# such as "1.2.3" or even "1.2.3-beta+001.ab"
+
+# this script will display the current version, automatically
+# suggest a "minor" version update, and ask for input to use
+# the suggestion, or a newly entered value.
+
+# once the new version number is determined, the script will
+# pull a list of changes from git history, prepend this to
+# a file called CHANGELOG.md (under the title of the new version
+# number), give user a chance to review and update the changelist
+# manually if needed and create a GIT tag.
+
+set -eu
+
+NOW="$(date +'%B %d, %Y')"
+RED="\033[1;31m"
+GREEN="\033[0;32m"
+YELLOW="\033[1;33m"
+BLUE="\033[1;34m"
+PURPLE="\033[1;35m"
+CYAN="\033[1;36m"
+WHITE="\033[1;37m"
+RESET="\033[0m"
+
+QUESTION_FLAG="${GREEN}?"
+WARNING_FLAG="${YELLOW}!"
+NOTICE_FLAG="${CYAN}❯"
+
+ADJUSTMENTS_MSG="${QUESTION_FLAG} ${CYAN}Now you can make adjustments to ${WHITE}CHANGELOG.md${CYAN}. Then press enter to continue."
+PUSHING_MSG="${NOTICE_FLAG} Pushing new version to the ${WHITE}origin${CYAN}..."
+
+if [ -f VERSION ]; then
+    BASE_STRING=`cat VERSION`
+    BASE_LIST=(`echo $BASE_STRING | tr '.' ' '`)
+    V_MAJOR=${BASE_LIST[0]}
+    V_MINOR=${BASE_LIST[1]}
+    V_PATCH=${BASE_LIST[2]}
+    echo -e "${NOTICE_FLAG} Current version: ${WHITE}$BASE_STRING"
+    SUGGESTED_VERSION="$V_MAJOR.$V_MINOR.$((V_PATCH + 1))"
+    echo -ne "${QUESTION_FLAG} ${CYAN}Enter a version number [${WHITE}$SUGGESTED_VERSION${CYAN}]: "
+    read INPUT_STRING
+    if [ "$INPUT_STRING" = "" ]; then
+        INPUT_STRING=$SUGGESTED_VERSION
+    fi
+    echo -e "${NOTICE_FLAG} Will set new version to be ${WHITE}$INPUT_STRING"
+    echo $INPUT_STRING > VERSION
+    git add VERSION
+    git commit -m "Bump version to ${INPUT_STRING}."
+    git tag -a -m "v$INPUT_STRING" "v$INPUT_STRING"
+    if git status --short | grep -q '*'; then
+        echo -e "${WARNING_FLAG} Git directory is dirty, refusing to compile pistol-static." >&2
+        exit 2
+    fi
+	nix build -L ".#pistol-static"
+    echo -e "${NOTICE_FLAG} Checking that the produced executable is not a dynamically linked"
+	ldd ./result/bin/pistol 2>&1 | grep 'not a dynamic executable'
+    echo -e "${NOTICE_FLAG} Checking that the produced executable has the version string compiled into it"
+    ./result/bin/pistol --version | grep $INPUT_STRING
+    # TODO: Support more executables once cross compilation works.
+	# https://cli.github.com/manual/gh_release_create
+	git log --pretty=format:"  - %s" "v$INPUT_STRING"...HEAD | tee | gh release create v$INPUT_STRING \
+        --notes-file - \
+        './result/bin/pistol#pistol-x86_64' \
+        ./result/share/man/man1/pistol.1.gz
+    git push origin --tags
+else
+    echo -e "${WARNING_FLAG} Could not find a VERSION file." >&2
+    exit 1
+fi
+
+echo -e "${NOTICE_FLAG} Finished."

flake.nix

@@ -65,6 +65,7 @@
             # Evaluated but not used for the build itself
             "gomod2nix.toml"
             "VERSION"
+            "bump-version.sh"
             # CI files
             "renovate.json5"
             # Git files