Initial bash completion

Makefile

@@ -25,8 +25,15 @@ install: writeimg
 	install -m 0755 $< $(DESTDIR)$(PREFIX)/bin/$<
 	install -m 0644 $<.1 $(DESTDIR)$(PREFIX)/share/man/man1/$<.1
 
+# Note that this bypasses PREFIX, since
+# bash does not source /usr/local by default
+install_bash: writeimg_completion_bash.sh
+	install -d $(DESTDIR)/etc/bash_completion.d
+	install -m 0644 $< $(DESTDIR)/etc/bash_completion.d/$<
+
 uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/writeimg
 	rm -f $(DESTDIR)$(PREFIX)/share/man/man1/writeimg.1
+	rm -f $(DESTDIR)/etc/bash_completion.d/writeimg*
 
 .PHONY: clean install uninstall

writeimg_completion_bash.sh

@@ -0,0 +1,25 @@
+_writeimg_completion() {
+    local cur prev opts
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    opts="-v -d -h --help -n --noconfirm -V --version"
+
+    # Devices
+    if [[ "$prev" == "-d" ]]; then
+        COMPREPLY=( $(compgen -W "$(ls -d /dev/sd* /dev/nvme* /dev/mmcblk* 2>/dev/null)" -- "$cur") )
+        return 0
+    fi
+
+    # Flags
+    if [[ "$cur" != -* ]]; then
+        COMPREPLY=( $(compgen -f -- "$cur") )
+        return 0
+    fi
+
+    # Files
+    COMPREPLY=( $(compgen -W "$opts" -- "$cur") )
+}
+
+complete -F _writeimg_completion writeimg