Reimplements Git repository mirroring because Git is a special snowflake.

etc/{README.md,pkgtool.usage}: updated.
groups/221.native_packages_dev.group:cparser:${PKG_DISABLED}: disabled due to repository unavailability.
groups/251.native_packages_lib.group:libfirm:${PKG_DISABLED}: disabled due to repository unavailability.
midipix.env:${DEFAULT_BUILD_VARS}: adds MIRRORS_GIT.
midipix.env:${DEFAULT_MIRRORS{,_GIT}}: split; mirror Git repositories via https://midipix.lucioillanes.de/repos_git/.
pkgtool.sh:pkgtoolp_mirror_fetch(): call rtl_fetch_mirror_urls_git() vs. rtl_fetch_urls_git().
pkgtool.sh:pkgtoolp_mirror_fetch(): symlink instead of downloading given package w/ parent package.
pkgtool.sh:pkgtoolp_mirror{,_fetch}(): split archives vs. Git repositories directory name.
subr.rtl/rtl_fetch.subr: factor out ${DEFAULT_GIT_ARGS}.
subr.rtl/rtl_fetch.subr:rtl_fetch_mirror_urls_git(): initial implementation.
subr.rtl/rtl_fetch.subr:rtlp_fetch_url_git(): always return on failure.
subr.rtl/rtl_fetch.subr:rtlp_fetch_url_git(): correctly attempt to git-clone(1) from ${PKG_URL} and then via ${PKG_MIRRORS}.
subr.rtl/rtl_fetch.subr:{rtlp_fetch_url_git,rtl_fetch_urls_git}(): cleanup.
{subr/pkg_fetch_download.subr,vars/{gcc,python[23]{,_host}}.vars}: call rtl_fetch_urls_git() w/ ${PKG_NAME} and ${PKG_MIRRORS_GIT:-}.

2 files changed, 33 insertions, 32 deletions

diff --git a/etc/README.md b/etc/README.md
index 914a953a..080f29fa 100644
--- a/etc/README.md
+++ b/etc/README.md
@@ -379,24 +379,24 @@ for a list of package build steps and how they are overriden.
 ## 3.5. ``pkgtool.sh``
 
 ```
-usage: ./pkgtool.sh [-a nt32|nt64] [-b debug|release] [-i|-m <dname>|-r|-s|-t]
-                    [<variable name>=<variable override>[ ..]]            name
-
-        -a nt32|nt64      Selects 32-bit or 64-bit architecture; defaults to nt64.
-        -b debug|release  Selects debug or release build kind; defaults to debug.
-        -i                List package variables and dependencies of single named package.
-        -m <dname>        Setup package archives mirror in <dname>
-        -r                List reverse dependencies of single named package.
-        -s                Enter interactive package build shell environment for single
-                          named package; requires a package dump file. If the package
-                          has not been built yet or built successfully, it will be rebuilt
-                          at build steps up until, by default, the `build' build step and
-                          forcibly aborted and dumped prior to enterting the shell.
-        -t                Produce tarball of package build root directory and build log
-                          file for the purpose of distribution given build failure.
+usage: ./pkgtool.sh [-a nt32|nt64] [-b debug|release] [-i|-m <dname1>,<dname2>|-r|-s|-t]
+                    [<variable name>=<variable override>[ ..]] name
+
+        -a nt32|nt64          Selects 32-bit or 64-bit architecture; defaults to nt64.
+        -b debug|release      Selects debug or release build kind; defaults to debug.
+        -i                    List package variables and dependencies of single named package.
+        -m <dname1>,<dname2>  Setup package archives mirror in <dname1> and Git repositories mirror in <dname2>
+        -r                    List reverse dependencies of single named package.
+        -s                    Enter interactive package build shell environment for single
+                              named package; requires a package dump file. If the package
+                              has not been built yet or built successfully, it will be rebuilt
+                              at build steps up until, by default, the `build' build step and
+                              forcibly aborted and dumped prior to enterting the shell.
+        -t                    Produce tarball of package build root directory and build log
+                              file for the purpose of distribution given build failure.
 
         <variable name>=<variable override>[ ..]
-                          Override build variable.
+                              Override build variable.
 ```
   
 > N.B. When using ``pkgtool.sh`` on a build w/ build variables (see section [4](#4-build-variables))
@@ -581,7 +581,8 @@ VERSION`` and/or ``URLS_GIT``, respectively.
 | MAKEFLAGS_INSTALL_EXTRA     | Additional list of ``make(1)`` flags during package ``make(1)``  installation                                                               |
 | MAKEFLAGS_VERBOSITY         | Variable-value pair to pass to ``make(1)`` in order to force echo-back of command lines prior to execution                                  |
 | MAKE_INSTALL_VNAME          | Variable name of ``make(1)`` installation destination directory variable during package ``make(1)``  installation                           |
-| MIRRORS                     | List of package archive/repository mirror base URLs to attempt downloading from; cf. ``pkgtool.sh -m <dname>``                              |
+| MIRRORS                     | List of package archive mirror base URLs to attempt downloading from; cf. ``pkgtool.sh -m <dname>``                                         |
+| MIRRORS_GIT                 | List of package Git repository mirror base URLs to attempt cloning from; cf. ``pkgtool.sh -m <dname>``                                      |
 | NO_CLEAN                    | Inhibit cleaning of package build directory beneath ``${PKG_BASE_DIR}`` pre-finish                                                          |
 | NO_CLEAN_BASE_DIR           | Inhibit cleaning of package build root directory beneath ``${BUILD_WORKDIR}``                                                               |
 | NO_LOG_VARS                 | Inhibit logging of build & package variables pre-package build                                                                              |
diff --git a/etc/pkgtool.usage b/etc/pkgtool.usage
index 3031180d..0ebc5acf 100644
--- a/etc/pkgtool.usage
+++ b/etc/pkgtool.usage
@@ -1,18 +1,18 @@
-usage: ./pkgtool.sh [-a nt32|nt64] [-b debug|release] [-i|-m <dname>|-r|-s|-t]
-                    [<variable name>=<variable override>[ ..]]            name
+usage: ./pkgtool.sh [-a nt32|nt64] [-b debug|release] [-i|-m <dname1>,<dname2>|-r|-s|-t]
+                    [<variable name>=<variable override>[ ..]] name
 
-        -a nt32|nt64      Selects 32-bit or 64-bit architecture; defaults to nt64.
-        -b debug|release  Selects debug or release build kind; defaults to debug.
-        -i                List package variables and dependencies of single named package.
-        -m <dname>        Setup package archives mirror in <dname>
-        -r                List reverse dependencies of single named package.
-        -s                Enter interactive package build shell environment for single
-                          named package; requires a package dump file. If the package
-                          has not been built yet or built successfully, it will be rebuilt
-                          at build steps up until, by default, the `build' build step and
-                          forcibly aborted and dumped prior to enterting the shell.
-        -t                Produce tarball of package build root directory and build log
-                          file for the purpose of distribution given build failure.
+        -a nt32|nt64          Selects 32-bit or 64-bit architecture; defaults to nt64.
+        -b debug|release      Selects debug or release build kind; defaults to debug.
+        -i                    List package variables and dependencies of single named package.
+        -m <dname1>,<dname2>  Setup package archives mirror in <dname1> and Git repositories mirror in <dname2>
+        -r                    List reverse dependencies of single named package.
+        -s                    Enter interactive package build shell environment for single
+                              named package; requires a package dump file. If the package
+                              has not been built yet or built successfully, it will be rebuilt
+                              at build steps up until, by default, the `build' build step and
+                              forcibly aborted and dumped prior to enterting the shell.
+        -t                    Produce tarball of package build root directory and build log
+                              file for the purpose of distribution given build failure.
 
         <variable name>=<variable override>[ ..]
-                          Override build variable.
+                              Override build variable.