17 files changed, 133 insertions, 69 deletions

diff --git a/Makefile b/Makefile
index 2dc92df..6fac5bd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 all::
 
-CGIT_VERSION = v0.10
+CGIT_VERSION = v0.10.1
 CGIT_SCRIPT_NAME = cgit.cgi
 CGIT_SCRIPT_PATH = /var/www/htdocs/cgit
 CGIT_DATA_PATH = $(CGIT_SCRIPT_PATH)
@@ -14,7 +14,7 @@ htmldir = $(docdir)
 pdfdir = $(docdir)
 mandir = $(prefix)/share/man
 SHA1_HEADER = <openssl/sha.h>
-GIT_VER = 1.8.5
+GIT_VER = 1.9.0
 GIT_URL = https://git-core.googlecode.com/files/git-$(GIT_VER).tar.gz
 INSTALL = install
 COPYTREE = cp -r
@@ -29,6 +29,7 @@ DOC_PDF  = $(patsubst %.txt,%.pdf,$(MAN_TXT))
 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
 # some C compilers supported these specifiers prior to C99 as an extension.
 #
+# Define HAVE_LINUX_SENDFILE to use sendfile()
 
 #-include config.mak
 
diff --git a/README b/README
index 7b72842..faf1851 100644
--- a/README
+++ b/README
@@ -38,14 +38,11 @@ If you'd like to compile without Lua support, you may use:
 
 And if you'd like to specify a Lua implementation, you may use:
 
-    $ make LUA_IMPLEMENTATION=JIT
+    $ make LUA_PKGCONFIG=lua5.1
 
-for using the LuaJIT project. Or:
-
-    $ make LUA_IMPLEMENTATION=VANILLA
-
-for the mainline Lua project. If you specify neither implementation, it will
-be auto-detected, preferring LuaJIT if both are present.
+If this is not specified, the Lua implementation will be auto-detected,
+preferring LuaJIT if many are present. Acceptable values are generally "lua",
+"luajit", "lua5.1", and "lua5.2".
 
 
 Dependencies
@@ -54,7 +51,7 @@ Dependencies
 * libzip
 * libcrypto (OpenSSL)
 * libssl (OpenSSL)
-* optional: luajit or lua
+* optional: luajit or lua, most reliably used when pkg-config is available
 
 Apache configuration
 --------------------
diff --git a/cache.c b/cache.c
index fcd461f..801e63f 100644
--- a/cache.c
+++ b/cache.c
@@ -13,6 +13,9 @@
  *
  */
 
+#ifdef HAVE_LINUX_SENDFILE
+#include <sys/sendfile.h>
+#endif
 #include "cgit.h"
 #include "cache.h"
 #include "html.h"
@@ -30,7 +33,6 @@ struct cache_slot {
         const char *lock_name;
         int match;
         struct stat cache_st;
-        struct stat lock_st;
         int bufsize;
         char buf[CACHE_BUFSIZE];
 };
@@ -81,6 +83,23 @@ static int close_slot(struct cache_slot *slot)
 /* Print the content of the active cache slot (but skip the key). */
 static int print_slot(struct cache_slot *slot)
 {
+#ifdef HAVE_LINUX_SENDFILE
+        off_t start_off;
+        int ret;
+
+        start_off = slot->keylen + 1;
+
+        do {
+                ret = sendfile(STDOUT_FILENO, slot->cache_fd, &start_off,
+                                slot->cache_st.st_size - start_off);
+                if (ret < 0) {
+                        if (errno == EAGAIN || errno == EINTR)
+                                continue;
+                        return errno;
+                }
+                return 0;
+        } while (1);
+#else
         ssize_t i, j;
 
         i = lseek(slot->cache_fd, slot->keylen + 1, SEEK_SET);
@@ -97,6 +116,7 @@ static int print_slot(struct cache_slot *slot)
                 return errno;
         else
                 return 0;
+#endif
 }
 
 /* Check if the slot has expired */
@@ -188,6 +208,10 @@ static int fill_slot(struct cache_slot *slot)
         /* Generate cache content */
         slot->fn();
 
+        /* update stat info */
+        if (fstat(slot->lock_fd, &slot->cache_st))
+                return errno;
+
         /* Restore stdout */
         if (dup2(tmp, STDOUT_FILENO) == -1)
                 return errno;
@@ -319,7 +343,7 @@ int cache_process(int size, const char *path, const char *key, int ttl,
         int result;
 
         /* If the cache is disabled, just generate the content */
-        if (size <= 0) {
+        if (size <= 0 || ttl == 0) {
                 fn();
                 return 0;
         }
diff --git a/cgit.c b/cgit.c
index 09fce0c..f488ebf 100644
--- a/cgit.c
+++ b/cgit.c
@@ -184,6 +184,8 @@ static void config_cb(const char *name, const char *value)
                 ctx.cfg.cache_dynamic_ttl = atoi(value);
         else if (!strcmp(name, "cache-about-ttl"))
                 ctx.cfg.cache_about_ttl = atoi(value);
+        else if (!strcmp(name, "cache-snapshot-ttl"))
+                ctx.cfg.cache_snapshot_ttl = atoi(value);
         else if (!strcmp(name, "case-sensitive-sort"))
                 ctx.cfg.case_sensitive_sort = atoi(value);
         else if (!strcmp(name, "about-filter"))
@@ -331,6 +333,7 @@ static void prepare_context(void)
         ctx.cfg.cache_max_create_time = 5;
         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
         ctx.cfg.cache_about_ttl = 15;
+        ctx.cfg.cache_snapshot_ttl = 5;
         ctx.cfg.cache_repo_ttl = 5;
         ctx.cfg.cache_root_ttl = 5;
         ctx.cfg.cache_scanrc_ttl = 15;
@@ -921,6 +924,23 @@ static void cgit_parse_args(int argc, const char **argv)
         int scan = 0;
 
         for (i = 1; i < argc; i++) {
+                if (!strcmp(argv[i], "--version")) {
+                        printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
+#ifdef NO_LUA
+                        printf("[-] ");
+#else
+                        printf("[+] ");
+#endif
+                        printf("Lua scripting\n");
+#ifndef HAVE_LINUX_SENDFILE
+                        printf("[-] ");
+#else
+                        printf("[+] ");
+#endif
+                        printf("Linux sendfile() usage\n");
+
+                        exit(0);
+                }
                 if (!prefixcmp(argv[i], "--cache=")) {
                         ctx.cfg.cache_root = xstrdup(argv[i] + 8);
                 } else if (!strcmp(argv[i], "--nocache")) {
@@ -978,6 +998,9 @@ static int calc_ttl()
         if (!strcmp(ctx.qry.page, "about"))
                 return ctx.cfg.cache_about_ttl;
 
+        if (!strcmp(ctx.qry.page, "snapshot"))
+                return ctx.cfg.cache_snapshot_ttl;
+
         if (ctx.qry.has_sha1)
                 return ctx.cfg.cache_static_ttl;
 
diff --git a/cgit.h b/cgit.h
index 496d0f6..0badc64 100644
--- a/cgit.h
+++ b/cgit.h
@@ -210,6 +210,7 @@ struct cgit_config {
         int cache_scanrc_ttl;
         int cache_static_ttl;
         int cache_about_ttl;
+        int cache_snapshot_ttl;
         int case_sensitive_sort;
         int embedded;
         int enable_filter_overrides;
diff --git a/cgit.mk b/cgit.mk
index 056c3f9..5048b09 100644
--- a/cgit.mk
+++ b/cgit.mk
@@ -29,30 +29,18 @@ ifdef NO_LUA
         LUA_MESSAGE := linking without specified Lua support
         CGIT_CFLAGS += -DNO_LUA
 else
-LUAJIT_CFLAGS := $(shell pkg-config --cflags luajit 2>/dev/null)
-LUAJIT_LIBS := $(shell pkg-config --libs luajit 2>/dev/null)
-LUA_LIBS := $(shell pkg-config --libs lua 2>/dev/null)
-LUA_CFLAGS := $(shell pkg-config --cflags lua 2>/dev/null)
-ifeq (JIT,$(LUA_IMPLEMENTATION))
-        ifeq ($(strip $(LUAJIT_LIBS)),)
-                $(error LuaJIT specified via LUA_IMPLEMENTATION=JIT, but library could not be found.)
-        endif
-        LUA_MESSAGE := linking with selected LuaJIT
-        CGIT_LIBS += $(LUAJIT_LIBS)
-        CGIT_CFLAGS += $(LUAJIT_CFLAGS)
-else ifeq (VANILLA,$(LUA_IMPLEMENTATION))
-        ifeq ($(strip $(LUA_LIBS)),)
-                $(error Lua specified via LUA_IMPLEMENTATION=VANILLA, but library could not be found.)
-        endif
-        LUA_MESSAGE := linking with selected Lua
-        CGIT_LIBS += $(LUA_LIBS)
-        CGIT_LIBS += $(LUA_CFLAGS)
-else ifneq ($(strip $(LUAJIT_LIBS)),)
-        LUA_MESSAGE := linking with autodetected LuaJIT
-        CGIT_LIBS += $(LUAJIT_LIBS)
-        CGIT_CFLAGS += $(LUAJIT_CFLAGS)
-else ifneq ($(strip $(LUA_LIBS)),)
-        LUA_MESSAGE := linking with autodetected Lua
+ifeq ($(LUA_PKGCONFIG),)
+        LUA_PKGCONFIG := $(shell for pc in luajit lua lua5.2 lua5.1; do \
+                        pkg-config --exists $$pc 2>/dev/null && echo $$pc && break; \
+                        done)
+        LUA_MODE := autodetected
+else
+        LUA_MODE := specified
+endif
+ifneq ($(LUA_PKGCONFIG),)
+        LUA_MESSAGE := linking with $(LUA_MODE) $(LUA_PKGCONFIG)
+        LUA_LIBS := $(shell pkg-config --libs $(LUA_PKGCONFIG) 2>/dev/null)
+        LUA_CFLAGS := $(shell pkg-config --cflags $(LUA_PKGCONFIG) 2>/dev/null)
         CGIT_LIBS += $(LUA_LIBS)
         CGIT_CFLAGS += $(LUA_CFLAGS)
 else
@@ -68,6 +56,14 @@ ifeq ($(findstring BSD,$(uname_S)),)
         CGIT_LIBS += -ldl
 endif
 
+# glibc 2.1+ offers sendfile which the most common C library on Linux
+ifeq ($(uname_S),Linux)
+        HAVE_LINUX_SENDFILE = YesPlease
+endif
+
+ifdef HAVE_LINUX_SENDFILE
+        CGIT_CFLAGS += -DHAVE_LINUX_SENDFILE
+endif
 
 CGIT_OBJ_NAMES += cgit.o
 CGIT_OBJ_NAMES += cache.o
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 8eafc4a..cbaebca 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -60,37 +60,41 @@ cache-root::
 
 cache-static-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
-        version of repository pages accessed with a fixed SHA1. Negative
-        values have infinite ttl. Default value: -1".
+        version of repository pages accessed with a fixed SHA1. See also:
+        "CACHE". Default value: -1".
 
 cache-dynamic-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
-        version of repository pages accessed without a fixed SHA1. Negative
-        values have infinite ttl. Default value: "5".
+        version of repository pages accessed without a fixed SHA1. See also:
+        "CACHE". Default value: "5".
 
 cache-repo-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
-        version of the repository summary page. Negative values have infinite
-        ttl. Default value: "5".
+        version of the repository summary page. See also: "CACHE". Default
+        value: "5".
 
 cache-root-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
-        version of the repository index page. Negative values have infinite
-        ttl. Default value: "5".
+        version of the repository index page. See also: "CACHE". Default
+        value: "5".
 
 cache-scanrc-ttl::
         Number which specifies the time-to-live, in minutes, for the result
-        of scanning a path for git repositories. Negative values have infinite
-        ttl. Default value: "15".
+        of scanning a path for git repositories. See also: "CACHE". Default
+        value: "15".
 
 cache-about-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
-        version of the repository about page. Negative values have infinite
-        ttl. Default value: "15".
+        version of the repository about page. See also: "CACHE". Default
+        value: "15".
+
+cache-snapshot-ttl::
+        Number which specifies the time-to-live, in minutes, for the cached
+        version of snapshots. See also: "CACHE". Default value: "5".
 
 cache-size::
-        The maximum number of entries in the cgit cache. Default value: "0"
-        (i.e. caching is disabled).
+        The maximum number of entries in the cgit cache. When set to "0",
+        caching is disabled. See also: "CACHE". Default value: "0"
 
 case-sensitive-sort::
         Sort items in the repo list case sensitively. Default value: "1".
@@ -712,6 +716,16 @@ the environment variables defined in "FILTER API":
 - repo.clone-url
 
 
+CACHE
+------
+
+All cache ttl values are in minutes. Negative ttl values indicate that a page
+type will never expire, and thus the first time a URL is accessed, the result
+will be cached indefinitely, even if the underlying git repository changes.
+Conversely, when a ttl value is zero, the cache is disabled for that
+particular page type, and the page type is never cached.
+
+
 EXAMPLE CGITRC FILE
 -------------------
 
diff --git a/cmd.c b/cmd.c
index cbd235c..188cd56 100644
--- a/cmd.c
+++ b/cmd.c
@@ -113,7 +113,7 @@ static void refs_fn(void)
 static void snapshot_fn(void)
 {
         cgit_print_snapshot(ctx.qry.head, ctx.qry.sha1, ctx.qry.path,
-                            ctx.repo->snapshots, ctx.qry.nohead);
+                            ctx.qry.nohead);
 }
 
 static void stats_fn(void)
diff --git a/filters/simple-authentication.lua b/filters/simple-authentication.lua
index 230d3a3..cc86b7e 100644
--- a/filters/simple-authentication.lua
+++ b/filters/simple-authentication.lua
@@ -166,7 +166,7 @@ function url_encode(str)
                 return ""
         end
         str = string.gsub(str, "\n", "\r\n")
-        str = string.gsub(str, "([^%w ])", function (c) return string.format("%%%02X", string.byte(c)) end)
+        str = string.gsub(str, "([^%w ])", function(c) return string.format("%%%02X", string.byte(c)) end)
         str = string.gsub(str, " ", "+")
         return str
 end
diff --git a/gen-version.sh b/gen-version.sh
index 3a08015..80cf49a 100755
--- a/gen-version.sh
+++ b/gen-version.sh
@@ -4,7 +4,7 @@
 V=$1
 
 # Use `git describe` to get current version if we're inside a git repo
-if test -d .git
+if test "$(git rev-parse --git-dir 2>/dev/null)" = '.git'
 then
         V=$(git describe --abbrev=4 HEAD 2>/dev/null)
 fi
diff --git a/git b/git
-Subproject d2446dfd7f3b3f8948142cfb07a0270e2497d93
+Subproject 5f95c9f850b19b368c43ae399cc831b17a26a5a
diff --git a/shared.c b/shared.c
index 7e88bbd..8ed14c0 100644
--- a/shared.c
+++ b/shared.c
@@ -368,6 +368,7 @@ void cgit_diff_tree(const unsigned char *old_sha1,
         struct diff_options opt;
         struct pathspec_item item;
 
+        memset(&item, 0, sizeof(item));
         diff_setup(&opt);
         opt.output_format = DIFF_FORMAT_CALLBACK;
         opt.detect_rename = 1;
diff --git a/tests/setup.sh b/tests/setup.sh
index 785edd7..7590f04 100755
--- a/tests/setup.sh
+++ b/tests/setup.sh
@@ -60,6 +60,12 @@ fi
 
 FILTER_DIRECTORY=$(cd ../filters && pwd)
 
+if cgit --version | grep -F -q "[+] Lua scripting"; then
+        export CGIT_HAS_LUA=1
+else
+        export CGIT_HAS_LUA=0
+fi
+
 mkrepo() {
         name=$1
         count=$2
@@ -133,7 +139,10 @@ repo.commit-filter=exec:$FILTER_DIRECTORY/dump.sh
 repo.email-filter=exec:$FILTER_DIRECTORY/dump.sh
 repo.source-filter=exec:$FILTER_DIRECTORY/dump.sh
 repo.readme=master:a+b
+EOF
 
+        if [ $CGIT_HAS_LUA -eq 1 ]; then
+                cat >>cgitrc <<EOF
 repo.url=filter-lua
 repo.path=$PWD/repos/filter/.git
 repo.desc=filtered repo
@@ -143,6 +152,7 @@ repo.email-filter=lua:$FILTER_DIRECTORY/dump.lua
 repo.source-filter=lua:$FILTER_DIRECTORY/dump.lua
 repo.readme=master:a+b
 EOF
+        fi
 }
 
 cgit_query()
@@ -155,7 +165,7 @@ cgit_url()
         CGIT_CONFIG="$PWD/cgitrc" QUERY_STRING="url=$1" cgit
 }
 
-strip_headers () {
+strip_headers() {
         while read -r line
         do
                 test -z "$line" && break
diff --git a/tests/t0111-filter.sh b/tests/t0111-filter.sh
index 730f1c0..2fdc366 100755
--- a/tests/t0111-filter.sh
+++ b/tests/t0111-filter.sh
@@ -3,7 +3,12 @@
 test_description='Check filtered content'
 . ./setup.sh
 
-for prefix in exec lua
+prefixes="exec"
+if [ $CGIT_HAS_LUA -eq 1 ]; then
+        prefixes="$prefixes lua"
+fi
+
+for prefix in $prefixes
 do
         test_expect_success "generate filter-$prefix/tree/a%2bb" "
                 cgit_url 'filter-$prefix/tree/a%2bb' >tmp
diff --git a/ui-refs.c b/ui-refs.c
index 147b665..0da063f 100644
--- a/ui-refs.c
+++ b/ui-refs.c
@@ -11,18 +11,10 @@
 #include "html.h"
 #include "ui-shared.h"
 
-static int cmp_age(int age1, int age2)
+static inline int cmp_age(int age1, int age2)
 {
-        if (age1 != 0 && age2 != 0)
-                return age2 - age1;
-
-        if (age1 == 0 && age2 == 0)
-                return 0;
-
-        if (age1 == 0)
-                return +1;
-
-        return -1;
+        /* age1 and age2 are assumed to be non-negative */
+        return age2 - age1;
 }
 
 static int cmp_ref_name(const void *a, const void *b)
@@ -105,7 +97,7 @@ static void print_tag_downloads(const struct cgit_repo *repo, const char *ref)
         const char *basename;
         int free_ref = 0;
 
-        if (!ref || strlen(ref) < 2)
+        if (!ref || strlen(ref) < 1)
                 return;
 
         basename = cgit_repobasename(repo->url);
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 582dc31..3107b05 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -193,7 +193,7 @@ static void show_error(char *fmt, ...)
 }
 
 void cgit_print_snapshot(const char *head, const char *hex,
-                         const char *filename, int snapshots, int dwim)
+                         const char *filename, int dwim)
 {
         const struct cgit_snapshot_format* f;
         char *prefix = NULL;
diff --git a/ui-snapshot.h b/ui-snapshot.h
index b6ede52..a8deec3 100644
--- a/ui-snapshot.h
+++ b/ui-snapshot.h
@@ -2,6 +2,6 @@
 #define UI_SNAPSHOT_H
 
 extern void cgit_print_snapshot(const char *head, const char *hex,
-                                const char *filename, int snapshot, int dwim);
+                                const char *filename, int dwim);
 
 #endif /* UI_SNAPSHOT_H */