From ca0fdcd5c943e1e2f6f6d19631268d842e920913 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20Hohnst=C3=A4dt?= <christian@hohnstaedt.de>
Date: Sun, 11 Apr 2021 14:07:50 +0200
Subject: [PATCH] Bash completion

---
 lib/arguments.cpp   | 14 +++++++++++++-
 lib/arguments.h     |  1 +
 lib/main.cpp        |  6 +++---
 misc/Makefile       |  4 +++-
 misc/xca.completion |  6 ++++++
 5 files changed, 26 insertions(+), 5 deletions(-)
 create mode 100644 misc/xca.completion

diff --git a/lib/arguments.cpp b/lib/arguments.cpp
index bd9fe965..bcb84a62 100644
--- a/lib/arguments.cpp
+++ b/lib/arguments.cpp
@@ -159,11 +159,23 @@ QString arguments::rst()
 	return s;
 }
 
+QString arguments::completion()
+{
+	QStringList sl;
+	for (auto i = opts.begin(); i != opts.end(); ++i)
+		sl << QString("--%1").arg(i->long_opt);
+	return sl.join(" ");
+}
+
 QString arguments::doc(const QString &which)
 {
 	if (which == "rst")
 		return rst();
-	return man();
+	if (which == "man")
+		return man();
+	if (which == "completion")
+		return completion();
+	return QString();
 }
 
 size_t arguments::maxOptWidth()
diff --git a/lib/arguments.h b/lib/arguments.h
index 2470d500..151b782c 100644
--- a/lib/arguments.h
+++ b/lib/arguments.h
@@ -50,6 +50,7 @@ class arguments
 	static QString help();
 	static QString man();
 	static QString rst();
+	static QString completion();
 	static size_t maxOptWidth();
 	static QString doc(const QString &which);
 
diff --git a/lib/main.cpp b/lib/main.cpp
index 6dee4f3d..6daa74c2 100644
--- a/lib/main.cpp
+++ b/lib/main.cpp
@@ -300,9 +300,9 @@ static void read_cmdline(int argc, char *argv[])
 
 int main(int argc, char *argv[])
 {
-	const char *xca_man = getenv("XCA_MAN");
-	if (xca_man && *xca_man) {
-		puts(CCHAR(arguments::doc(xca_man)));
+	const char *xca_special = getenv("XCA_SPECIAL");
+	if (xca_special && *xca_special) {
+		puts(CCHAR(arguments::doc(xca_special)));
 		return 0;
 	}
 #if QT_VERSION < 0x050000
diff --git a/misc/Makefile b/misc/Makefile
index 6b7281d4..1bd3459a 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -27,11 +27,13 @@ endif
 install:
 	install -m 755 -d $(DESTDIR)$(xca_prefix) \
 		$(DESTDIR)$(datarootdir)/applications \
-		$(DESTDIR)$(datarootdir)/mime/packages
+		$(DESTDIR)$(datarootdir)/mime/packages \
+		$(DESTDIR)$(datarootdir)/bash-completion/completions
 	install -m 644 $(CONFIG_OBJ) $(SRCPATH)*.xca \
 			$(DESTDIR)$(xca_prefix)
 	install -m 644 $(SRCPATH)xca.desktop $(DESTDIR)$(datarootdir)/applications
 	install -m 644 $(SRCPATH)xca.xml $(DESTDIR)$(datarootdir)/mime/packages
+	install -m 644 $(SRCPATH)xca.completion $(DESTDIR)$(datarootdir)/bash-completion/completions/xca
 	if test -z "$(DESTDIR)"; then \
 	  update-mime-database $(datarootdir)/mime || :; \
 	  update-desktop-database || :; \
diff --git a/misc/xca.completion b/misc/xca.completion
new file mode 100644
index 00000000..5f42842d
--- /dev/null
+++ b/misc/xca.completion
@@ -0,0 +1,6 @@
+
+_XCA_WORDS="$(XCA_SPECIAL=completion xca)"
+_xca() {
+  COMPREPLY=($(compgen -o bashdefault -W "$_XCA_WORDS" -- "${COMP_WORDS[COMP_CWORD]}"))
+}
+complete -F _xca xca