From 89d1dd0a7c63c7497d334e9f240ce7e36ca89434 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADt=20Ondruch?= <vondruch@redhat.com>
Date: Thu, 5 Nov 2015 14:29:21 +0100
Subject: [PATCH] Add RubyGems support.

Allow to expand RubyGems .gem file using regular %setup macro and in
addition generate also associated .gemspec file.
---
 build/parsePrep.c   | 22 ++++++++++++++++++++++
 configure.ac        |  1 +
 macros.in           |  1 +
 rpmio/rpmfileutil.c |  2 ++
 rpmio/rpmfileutil.h |  3 ++-
 5 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/build/parsePrep.c b/build/parsePrep.c
index b94aad2..64477e7 100644
--- a/build/parsePrep.c
+++ b/build/parsePrep.c
@@ -170,6 +170,7 @@ static char *doUntar(rpmSpec spec, uint32_t c, int quietly)
     if (compressed != COMPRESSED_NOT) {
 	char *zipper, *t = NULL;
 	int needtar = 1;
+	int needgemspec = 0;
 
 	switch (compressed) {
 	case COMPRESSED_NOT:	/* XXX can't happen */
@@ -200,6 +201,11 @@ static char *doUntar(rpmSpec spec, uint32_t c, int quietly)
 	    t = "%{__7zip} x";
 	    needtar = 0;
 	    break;
+	case COMPRESSED_GEM:
+	    t = "%{__gem} unpack";
+	    needtar = 0;
+	    needgemspec = 1;
+	    break;
 	}
 	zipper = rpmGetPath(t, NULL);
 	if (needtar) {
@@ -208,6 +214,22 @@ static char *doUntar(rpmSpec spec, uint32_t c, int quietly)
 		"if [ $STATUS -ne 0 ]; then\n"
 		"  exit $STATUS\n"
 		"fi", zipper, fn, tar, taropts);
+	} else if (needgemspec) {
+	    char *gem = rpmGetPath("%{__gem}", NULL);
+	    char *gemspec = NULL;
+	    char gemnameversion[strlen(sp->source) - 3];
+
+	    rstrlcpy(gemnameversion, sp->source, strlen(sp->source) - 3);
+	    gemspec = rpmGetPath("%{_builddir}/", gemnameversion, ".gemspec", NULL);
+
+	    rasprintf(&buf, "%s '%s' && %s spec '%s' --ruby > '%s'\n"
+		"STATUS=$?\n"
+		"if [ $STATUS -ne 0 ]; then\n"
+		"  exit $STATUS\n"
+		"fi", zipper, fn, gem, fn, gemspec);
+
+	    free(gemspec);
+	    free(gem);
 	} else {
 	    rasprintf(&buf, "%s '%s'\n"
 		"STATUS=$?\n"
diff --git a/configure.ac b/configure.ac
index e1baeb6..d6e8c0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -109,6 +109,7 @@ AC_PATH_PROG(__INSTALL, install, /usr/bin/install, $MYPATH)
 AC_PATH_PROG(__LRZIP, lrzip, /usr/bin/lrzip, $MYPATH)
 AC_PATH_PROG(__LZIP, lzip, /usr/bin/lzip, $MYPATH)
 AC_PATH_PROG(__XZ, xz, /usr/bin/xz, $MYPATH)
+AC_PATH_PROG(__GEM, gem, /usr/bin/gem, $MYPATH)
 AC_PATH_PROG(__MAKE, make, /usr/bin/make, $MYPATH)
 AC_PATH_PROG(__MKDIR, mkdir, /bin/mkdir, $MYPATH)
 AC_PATH_PROG(__MV, mv, /bin/mv, $MYPATH)
diff --git a/macros.in b/macros.in
index 6ea04c9..f36dd5e 100644
--- a/macros.in
+++ b/macros.in
@@ -68,6 +68,7 @@
 %__ssh			@__SSH@
 %__tar			@__TAR@
 %__unzip		@__UNZIP@
+%__gem			@__GEM@
 %__git			@__GIT@
 %__hg			@__HG@
 %__bzr			@__BZR@
diff --git a/rpmio/rpmfileutil.c b/rpmio/rpmfileutil.c
index 40d619c..67bffb9 100644
--- a/rpmio/rpmfileutil.c
+++ b/rpmio/rpmfileutil.c
@@ -370,6 +370,8 @@ int rpmFileIsCompressed(const char * file, rpmCompressedMagic * compressed)
 	*compressed = COMPRESSED_7ZIP;
     } else if (rpmFileHasSuffix(file, ".lzma")) {
 	*compressed = COMPRESSED_LZMA;
+    } else if (rpmFileHasSuffix(file, ".gem")) {
+	*compressed = COMPRESSED_GEM;
     }
 
     return rc;
diff --git a/rpmio/rpmfileutil.h b/rpmio/rpmfileutil.h
index 79fac86..3c0a984 100644
--- a/rpmio/rpmfileutil.h
+++ b/rpmio/rpmfileutil.h
@@ -26,7 +26,8 @@ typedef enum rpmCompressedMagic_e {
     COMPRESSED_XZ		= 5,	/*!< xz can handle */
     COMPRESSED_LZIP		= 6,	/*!< lzip can handle */
     COMPRESSED_LRZIP		= 7,	/*!< lrzip can handle */
-    COMPRESSED_7ZIP		= 8	/*!< 7zip can handle */
+    COMPRESSED_7ZIP		= 8,	/*!< 7zip can handle */
+    COMPRESSED_GEM		= 9	/*!< gem can handle */
 } rpmCompressedMagic;
 
 /** \ingroup rpmfileutil
-- 
2.10.1