Optimize Bazel external dependencies

This change does the following:

- Always use {,new_}http_archive rather than git_repository
- Make liberal use of strip_prefix
- Clarify licenses() in BUILD files
- On POSIX include headers like a normal C/C++ program

This change accomplishes the following:

- Reduce download size >100MB: The biggest culprit is grpc which has
  tens of thousands of commits in its GitHub repository.

- Reduce disk size >200MB: On disk, grpc takes up 250MB when cloned even
  though the tarball of the git repo is 3.2MB. By never using git
  externals, we save on network.

- Consume less cpu: Cloning git repositories is much slower than
  downloading and extracting a tarball.
Change: 133895791

1 files changed, 83 insertions, 77 deletions

diff --git a/jpeg.BUILD b/jpeg.BUILD
index ad9e44363c..92c9ddcacf 100644
--- a/jpeg.BUILD
+++ b/jpeg.BUILD
@@ -1,83 +1,89 @@
-SOURCES = [
-    "jaricom.c",
-    "jcapimin.c",
-    "jcapistd.c",
-    "jcarith.c",
-    "jccoefct.c",
-    "jccolor.c",
-    "jcdctmgr.c",
-    "jchuff.c",
-    "jcinit.c",
-    "jcmainct.c",
-    "jcmarker.c",
-    "jcmaster.c",
-    "jcomapi.c",
-    "jcparam.c",
-    "jcprepct.c",
-    "jcsample.c",
-    "jctrans.c",
-    "jdarith.c",
-    "jdapimin.c",
-    "jdapistd.c",
-    "jdatadst.c",
-    "jdatasrc.c",
-    "jdcoefct.c",
-    "jdcolor.c",
-    "jddctmgr.c",
-    "jdhuff.c",
-    "jdinput.c",
-    "jdmainct.c",
-    "jdmarker.c",
-    "jdmaster.c",
-    "jdmerge.c",
-    "jdpostct.c",
-    "jdsample.c",
-    "jdtrans.c",
-    "jerror.c",
-    "jfdctflt.c",
-    "jfdctfst.c",
-    "jfdctint.c",
-    "jidctflt.c",
-    "jidctfst.c",
-    "jidctint.c",
-    "jmemmgr.c",
-    "jmemnobs.c",
-    "jquant1.c",
-    "jquant2.c",
-    "jutils.c",
-]
+# Description:
+#   The Independent JPEG Group's JPEG runtime library.
 
-HEADERS = [
-    "cderror.h",
-    "cdjpeg.h",
-    "jconfig.h",
-    "jdct.h",
-    "jerror.h",
-    "jinclude.h",
-    "jmemsys.h",
-    "jmorecfg.h",
-    "jpegint.h",
-    "jpeglib.h",
-    "jversion.h",
-    "transupp.h",
-]
-
-prefix_dir = "jpeg-9a"
-
-genrule(
-    name = "configure",
-    srcs = glob(
-        ["**/*"],
-        exclude = [prefix_dir + "/jconfig.h"],
-    ),
-    outs = [prefix_dir + "/jconfig.h"],
-    cmd = "pushd external/jpeg_archive/%s; workdir=$$(mktemp -d -t tmp.XXXXXXXXXX); cp -a * $$workdir; pushd $$workdir; ./configure; popd; popd; cp $$workdir/jconfig.h $(@D); rm -rf $$workdir;" % prefix_dir,
-)
+licenses(["notice"])  # custom notice-style license, see LICENSE
 
 cc_library(
     name = "jpeg",
-    srcs = [prefix_dir + "/" + source for source in SOURCES],
-    hdrs = glob(["**/*.h"]) + [":configure"],
-    includes = [prefix_dir],
+    srcs = [
+        "cderror.h",
+        "cdjpeg.h",
+        "jaricom.c",
+        "jcapimin.c",
+        "jcapistd.c",
+        "jcarith.c",
+        "jccoefct.c",
+        "jccolor.c",
+        "jcdctmgr.c",
+        "jchuff.c",
+        "jcinit.c",
+        "jcmainct.c",
+        "jcmarker.c",
+        "jcmaster.c",
+        "jcomapi.c",
+        "jconfig.h",
+        "jcparam.c",
+        "jcprepct.c",
+        "jcsample.c",
+        "jctrans.c",
+        "jdapimin.c",
+        "jdapistd.c",
+        "jdarith.c",
+        "jdatadst.c",
+        "jdatasrc.c",
+        "jdcoefct.c",
+        "jdcolor.c",
+        "jdct.h",
+        "jddctmgr.c",
+        "jdhuff.c",
+        "jdinput.c",
+        "jdmainct.c",
+        "jdmarker.c",
+        "jdmaster.c",
+        "jdmerge.c",
+        "jdpostct.c",
+        "jdsample.c",
+        "jdtrans.c",
+        "jerror.c",
+        "jfdctflt.c",
+        "jfdctfst.c",
+        "jfdctint.c",
+        "jidctflt.c",
+        "jidctfst.c",
+        "jidctint.c",
+        "jinclude.h",
+        "jmemmgr.c",
+        "jmemnobs.c",
+        "jmemsys.h",
+        "jmorecfg.h",
+        "jquant1.c",
+        "jquant2.c",
+        "jutils.c",
+        "jversion.h",
+        "transupp.h",
+    ],
+    hdrs = [
+        "jerror.h",
+        "jpegint.h",
+        "jpeglib.h",
+    ],
+    includes = ["."],
     visibility = ["//visibility:public"],
 )
+
+genrule(
+    name = "configure",
+    outs = ["jconfig.h"],
+    cmd = "cat <<EOF >$@\n" +
+          "#define HAVE_PROTOTYPES 1\n" +
+          "#define HAVE_UNSIGNED_CHAR 1\n" +
+          "#define HAVE_UNSIGNED_SHORT 1\n" +
+          "#define HAVE_STDDEF_H 1\n" +
+          "#define HAVE_STDLIB_H 1\n" +
+          "#ifdef WIN32\n" +
+          "#define INLINE __inline\n" +
+          "#else\n" +
+          "#define INLINE __inline__\n" +
+          "#endif\n" +
+          "EOF\n",
+)