4 files changed, 41 insertions, 15 deletions
diff --git a/custom/extensions/email-gravatar.lua b/custom/extensions/email-gravatar.lua
index 01db3f9..836841f 100644
--- a/custom/extensions/email-gravatar.lua
+++ b/custom/extensions/email-gravatar.lua
@@ -12,7 +12,8 @@
 -- The one dependency is luaossl, the OpenSSL binding that provides
 -- openssl.digest, from <https://github.com/wahern/luaossl>. The reliable
 -- cross-platform install is LuaRocks, matched to the Lua version cgit is built
--- against, and it needs the OpenSSL development headers present.
+-- against, and it needs the OpenSSL development headers present. Without it
+-- the filter draws no icons and leaves the names as they are.
 --
 --     # Debian and Ubuntu
 --     sudo apt install luarocks libssl-dev
@@ -31,7 +32,7 @@
 -- that is not acceptable for your instance. Addresses are hashed with MD5,
 -- which Gravatar still accepts.
 
-local digest = require("openssl.digest")
+local has_digest, digest = pcall(require, "openssl.digest")
 
 
 -- The size is in pixels and serves both as the image asked of the service
@@ -94,7 +95,7 @@ end
 function filter_open(email, page)
 	buffer = ""
 	local address = normalize_email(email)
-	if address == nil then
+	if address == nil or not has_digest then
 		avatar_hash = nil
 	else
 		avatar_hash = hash_hex(address)
diff --git a/custom/extensions/email-libravatar.lua b/custom/extensions/email-libravatar.lua
index 1fb979d..2b1fecd 100644
--- a/custom/extensions/email-libravatar.lua
+++ b/custom/extensions/email-libravatar.lua
@@ -11,7 +11,8 @@
 -- The one dependency is luaossl, the OpenSSL binding that provides
 -- openssl.digest, from <https://github.com/wahern/luaossl>. The reliable
 -- cross-platform install is LuaRocks, matched to the Lua version cgit is built
--- against, and it needs the OpenSSL development headers present.
+-- against, and it needs the OpenSSL development headers present. Without it
+-- the filter draws no icons and leaves the names as they are.
 --
 --     # Debian and Ubuntu
 --     sudo apt install luarocks libssl-dev
@@ -29,7 +30,7 @@
 -- committer's email to a third-party service, so leave this filter off if
 -- that is not acceptable for your instance. Addresses are hashed with MD5.
 
-local digest = require("openssl.digest")
+local has_digest, digest = pcall(require, "openssl.digest")
 
 
 -- The size is in pixels and serves both as the image asked of the service
@@ -92,7 +93,7 @@ end
 function filter_open(email, page)
 	buffer = ""
 	local address = normalize_email(email)
-	if address == nil then
+	if address == nil or not has_digest then
 		avatar_hash = nil
 	else
 		avatar_hash = hash_hex(address)
diff --git a/tests/extensions/test-email-avatar.lua b/tests/extensions/test-email-avatar.lua
index 4960ec3..bedcfe8 100644
--- a/tests/extensions/test-email-avatar.lua
+++ b/tests/extensions/test-email-avatar.lua
@@ -3,8 +3,8 @@
 -- two scripts differ only in the service they point at, so the expected host
 -- is picked from the script's name. The second argument chooses how the
 -- openssl.digest dependency is met, stub swaps in the deterministic fake
--- from the harness, and real uses an installed luaossl and adds the one
--- check only a genuine MD5 can pass.
+-- from the harness, real uses an installed luaossl and adds the one check
+-- only a genuine MD5 can pass, and missing makes the module fail to load.
 
 local test_directory = arg[0]:match("^(.*)/") or "."
 local h = dofile(test_directory .. "/harness.lua")
@@ -21,6 +21,8 @@ end
 
 if mode == "stub" then
 	h.stub_digest()
+elseif mode == "missing" then
+	h.preload_failure("openssl.digest")
 end
 
 h.load(script)
@@ -29,6 +31,13 @@ local function render(email, name)
 	return h.run({ email, "commit" }, { name })
 end
 
+if mode == "missing" then
+	local out, ret = render("<author@example.com>", "A U Thor")
+	h.equals("without luaossl the name stands alone", out, "A U Thor")
+	h.equals("and close still answers zero", ret, 0)
+	h.finish()
+end
+
 local function hash_of(output)
 	local prefix = base_url:gsub("([%^%$%(%)%%%.%[%]%*%+%-%?])", "%%%1")
 	return output:match("src='" .. prefix .. "(%x+)%?")
diff --git a/tests/t0504-email-avatar.sh b/tests/t0504-email-avatar.sh
index 91ddc20..0150c54 100755
--- a/tests/t0504-email-avatar.sh
+++ b/tests/t0504-email-avatar.sh
@@ -3,11 +3,11 @@
 # Checks email-gravatar.lua and email-libravatar.lua, the shipped email
 # filters, which differ only in the service the icon is fetched from. The
 # unit checks run each under every suitable standalone Lua with a
-# deterministic digest standing in for luaossl, and once more against the
-# real module wherever it is installed, which adds the check that a known
-# address hashes to its published md5. The run through cgit itself needs
-# luaossl inside the binary's own Lua, so it is probed for rather than
-# assumed.
+# deterministic digest standing in for luaossl, with the module made to
+# fail to load, and once more against the real module wherever it is
+# installed, which adds the check that a known address hashes to its
+# published md5. Through cgit itself the answer depends on whether the
+# binary's own Lua has luaossl, so it is probed for rather than assumed.
 
 test_description='Check the shipped email avatar extensions'
 CGIT_TEST_NO_CREATE_REPOS=YesPlease
@@ -25,6 +25,9 @@ do
 		test_expect_success "$script checks under $lua" "
 			'$lua' '$EXT_TEST_DIRECTORY/test-email-avatar.lua' '$EXTENSIONS_DIRECTORY/$script.lua' stub
 		"
+		test_expect_success "$script checks without luaossl under $lua" "
+			'$lua' '$EXT_TEST_DIRECTORY/test-email-avatar.lua' '$EXTENSIONS_DIRECTORY/$script.lua' missing
+		"
 
 		if "$lua" -e "require([[openssl.digest]])" >/dev/null 2>&1
 		then
@@ -49,11 +52,16 @@ if test "$CGIT_HAS_LUA" -eq 1 &&
 	cgit_lua_probe "$PWD/repos/avatar/.git" openssl.digest
 then
 	test_set_prereq CGIT_LUA_OSSL
+elif test "$CGIT_HAS_LUA" -eq 1
+then
+	test_set_prereq CGIT_LUA_NOOSSL
+	say 'cgit lua has no luaossl, expecting names without icons'
 else
-	say 'cgit lua has no luaossl, filter checks through cgit skipped'
+	say 'cgit built without lua, filter checks through cgit skipped'
 fi
+test "$CGIT_HAS_LUA" -eq 1 && test_set_prereq CGIT_LUA
 
-test_expect_success CGIT_LUA_OSSL 'point cgit at it through the email filter' '
+test_expect_success CGIT_LUA 'point cgit at it through the email filter' '
 	cat >cgitrc <<-EOF
 	virtual-root=/
 	cache-size=0
@@ -71,4 +79,11 @@ test_expect_success CGIT_LUA_OSSL 'the commit page draws the author icon' '
 	grep "loading=.lazy." tmp
 '
 
+test_expect_success CGIT_LUA_NOOSSL 'without luaossl the page keeps the name alone' '
+	cgit_url "avatar/commit/" >tmp &&
+	grep "A U Thor" tmp &&
+	! grep "<img src=.https:" tmp &&
+	! grep "Unable to complete the request" tmp
+'
+
 test_done