Rework texlive package to install from source (#14332)

* Rework texlive package to install from source

This PR reworks the texlive package so that it installs from versioned
source distibution files. This is preferred over installing the binary
package for several reasons. For the binary installation:

1. Each component is downloaded, so can not use a spack mirror.
2. Changes in components over time are not reflected in spack hash.
3. Some of the binaries do not run due to glibc issues, depending on OS.

This PR keeps the binary installation as an option but it should be
considered deprecated, and probably rewmoved at some point.

This PR depends on zziplib from PR #14318.

* Fix flake8 issues

var/spack/repos/builtin/packages/texlive/package.py

@@ -6,29 +6,67 @@
 from spack import *
 import os
 import platform
+import glob
 
 
-class Texlive(Package):
-    """TeX Live is a free software distribution for the TeX typesetting
-       system.  Heads up, it's is not a reproducible installation."""
+class Texlive(AutotoolsPackage):
+    """TeX Live is an easy (we hope) way to get up and running with the TeX
+    document production system. It provides a comprehensive TeX system with
+    binaries for most flavors of Unix, including GNU/Linux, macOS, and also
+    Windows. It includes all the major TeX-related programs, macro packages,
+    and fonts that are free software, including support for many languages
+    around the world."""
 
     homepage = "http://www.tug.org/texlive"
+    url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive/2019/texlive-20190410-source.tar.xz'
+    base_url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive/{year}/texlive-{version}-{dist}.tar.xz'
+    list_url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive'
+    list_depth = 1
 
-    # Install from specific site because the texlive mirrors do not
-    # all update in synchrony.
-    #
-    # BEWARE: TexLive updates their installs frequently (probably why
-    # they call it *Live*...).  There is no good way to provide a
-    # repeatable install of the package.
-    #
-    # We're now pulling the installation bits from tug.org's repo of
-    # historic bits.  This means that the checksum for the installer
-    # itself is stable.  Don't let that fool you though, it's still
-    # installing TeX **LIVE** from e.g. ctan.math.... below, which is
-    # not reproducible.
+    # Below is the url for a binary distribution. This was originally how this
+    # was distributed in Spack, but should be considered deprecated. Note that
+    # the "live" version will pull down the packages so it requires an Internet
+    # connection at install time and the package versions could change over
+    # time. It is better to use a version built from tarballs, as defined with
+    # the "releases" below.
     version('live', sha256='44aa41b5783e345b7021387f19ac9637ff1ce5406a59754230c666642dfe7750',
             url='ftp://tug.org/historic/systems/texlive/2019/install-tl-unx.tar.gz')
 
+    # Add information for new versions below.
+    releases = [
+        {
+            'version': '20190410',
+            'year': '2019',
+            'sha256_source': 'd2a29fef04e34dc3d2d2296c18995fc357aa7625e7a6bbf40fb92d83d3d0d7b5',
+            'sha256_texmf': 'c2ec974abc98b91995969e7871a0b56dbc80dd8508113ffcff6923e912c4c402',
+        },
+    ]
+
+    for release in releases:
+        version(
+            release['version'],
+            sha256=release['sha256_source'],
+            url=base_url.format(
+                year=release['year'],
+                version=release['version'],
+                dist='source'
+            )
+        )
+
+        resource(
+            name='texmf',
+            url=base_url.format(
+                year=release['year'],
+                version=release['version'],
+                dist='texmf'
+            ),
+            sha256=release['sha256_texmf'],
+            when='@{0}'.format(
+                release['version']
+            )
+        )
+
+    # The following variant is only for the "live" binary installation.
     # There does not seem to be a complete list of schemes.
     # Examples include:
     #   full scheme (everything)
@@ -42,15 +80,111 @@ class Texlive(Package):
         'scheme',
         default='small',
         values=('minimal', 'basic', 'small', 'medium', 'full'),
-        description='Package subset to install'
+        description='Package subset to install, only meaningful for "live" '
+        'version'
     )
 
-    depends_on('perl', type='build')
+    depends_on('perl', type='build', when='@live')
+    depends_on('pkgconfig', when='@2019:', type='build')
+
+    depends_on('cairo+X', when='@2019:')
+    depends_on('freetype', when='@2019:')
+    depends_on('ghostscript', when='@2019:')
+    depends_on('gmp', when='@2019:')
+    depends_on('harfbuzz+graphite2', when='@2019:')
+    depends_on('icu4c', when='@2019:')
+    depends_on('libgd', when='@2019:')
+    depends_on('libpaper', when='@2019:')
+    depends_on('libpng', when='@2019:')
+    depends_on('libxaw', when='@2019:')
+    depends_on('libxt', when='@2019:')
+    depends_on('mpfr', when='@2019:')
+    depends_on('perl', when='@2019:')
+    depends_on('pixman', when='@2019:')
+    depends_on('poppler', when='@2019:')
+    depends_on('teckit', when='@2019:')
+    depends_on('zlib', when='@2019:')
+    depends_on('zziplib', when='@2019:')
+
+    build_directory = 'spack-build'
+
+    def tex_arch(self):
+        tex_arch = '{0}-{1}'.format(platform.machine(),
+                                    platform.system().lower())
+        return tex_arch
+
+    @when('@2019:')
+    def configure_args(self):
+        args = [
+            '--bindir={0}'.format(join_path(self.prefix.bin, self.tex_arch())),
+            '--disable-dvisvgm',
+            '--disable-native-texlive-build',
+            '--disable-static',
+            '--enable-shared',
+            '--with-banner-add= - Spack',
+            '--dataroot={0}'.format(self.prefix),
+            '--with-system-cairo',
+            '--with-system-freetype2',
+            '--with-system-gd',
+            '--with-system-gmp',
+            '--with-system-graphite2',
+            '--with-system-harfbuzz',
+            '--with-system-icu',
+            '--with-system-libpaper',
+            '--with-system-libpng',
+            '--with-system-mpfr',
+            '--with-system-pixman',
+            '--with-system-poppler',
+            '--with-system-teckit',
+            '--with-system-zlib',
+            '--with-system-zziplib',
+        ]
+
+        return args
+
+    @run_after('install')
+    def setup_texlive(self):
+        if not self.spec.satisfies('@live'):
+            mkdirp(self.prefix.tlpkg.TeXLive)
+            for files in glob.glob('texk/tests/TeXLive/*'):
+                install(files, self.prefix.tlpkg.TeXLive)
+
+            with working_dir('spack-build'):
+                make('texlinks')
+
+            copy_tree('texlive-{0}-texmf'.format(self.version.string),
+                      self.prefix)
+
+            # Create and run setup utilities
+            fmtutil_sys = Executable(join_path(self.prefix.bin,
+                                               self.tex_arch(), 'fmtutil-sys'))
+            mktexlsr = Executable(join_path(self.prefix.bin, self.tex_arch(),
+                                            'mktexlsr'))
+            mtxrun = Executable(join_path(self.prefix.bin, self.tex_arch(),
+                                          'mtxrun'))
+            mktexlsr()
+            fmtutil_sys('--all')
+            mtxrun('--generate')
+
+        else:
+            pass
 
     def setup_run_environment(self, env):
-        suffix = "%s-%s" % (platform.machine(), platform.system().lower())
-        env.prepend_path('PATH', join_path(self.prefix.bin, suffix))
+        env.prepend_path('PATH', join_path(self.prefix.bin, self.tex_arch()))
+
+    @when('@live')
+    def autoreconf(self, spec, prefix):
+        touch('configure')
+
+    @when('@live')
+    def configure(self, spec, prefix):
+        pass
+
+    @when('@live')
+    def build(self, spec, prefix):
+        pass
 
+    @when('@live')
     def install(self, spec, prefix):
         # Using texlive's mirror system leads to mysterious problems,
         # in lieu of being able to specify a repository as a variant, hardwire