Remove support for bzr, cvs, darcs, fossil and svn

Not having to support five vcs for the benefit of a handful of
packages makes it more appealing to improve the remaining code).

See #4802.

.travis.yml

@@ -3,18 +3,13 @@ language: ruby
 addons:
   apt:
     packages:
-    - bzr
     - git
     - mercurial
-    - subversion
-    - cvs
-    - darcs
-    - fossil
     - texinfo
 
 before_install:
   - sudo apt-get -yq update
-  - sudo apt-get -yq install bzr git mercurial subversion cvs darcs fossil texinfo
+  - sudo apt-get -yq install git mercurial texinfo
 
   - git clone https://github.com/rejeep/evm.git $HOME/.evm
   - export PATH=$HOME/.evm/bin:$PATH

README.md

@@ -105,42 +105,43 @@ the following form (`[...]` denotes optional or conditional values),
 
 ```lisp
 (<package-name>
- :fetcher [git|github|gitlab|bitbucket|bzr|hg|darcs|fossil|svn|cvs|wiki]
+ :fetcher [git|github|gitlab|bitbucket|hg|wiki]
  [:url "<repo url>"]
  [:repo "github-gitlab-or-bitbucket-user/repo-name"]
  [:version-regexp "<regexp>"]
- [:module "cvs-module"]
  [:files ("<file1>" ...)])
 ```
 
 - `package-name`
 a lisp symbol that has the same name as the package being specified.
 
-- `:fetcher` (one of `git, github, gitlab, bitbucket, bzr, hg, darcs,
-fossil, svn, cvs, wiki`) specifies the type of repository that `:url`
-points to. Right now package-build supports [git][git],
-[github][github], [gitlab][gitlab], [bitbucket][bitbucket],
-[bazaar (bzr)][bzr], [mercurial (hg)][hg], [subversion (svn)][svn],
-[cvs][cvs], [darcs][darcs], [fossil][fossil], and
-[EmacsWiki (deprecated)][emacswiki] as possible mechanisms for checking out
-the repository. (Note: `bitbucket` assumes `hg`: `git` repos hosted on
-bitbucket should use the `git` fetcher.)
-
-    *package-build* uses
-the corresponding application to update files before building the
-package. In the case of the `github`
-fetcher, use `:repo` instead of `:url`; the git URL will then be
-deduced.
-
-    The Emacs Wiki fetcher gets the latest version of the package
-from `http://www.emacswiki.org/emacs/download/<NAME>.el` where `NAME`
-is the package name. Note that the `:url` property is not needed for
-the `wiki` engine unless the name of the package file on the EmacsWiki
-differs from the package name being built.
+- `:fetcher` specifies the type of repository that `:url` or `:repo`
+  points to.  Melpa supports [`git`][git], [`github`][github],
+  [`gitlab`][gitlab], [`hg`][hg] (Mercurial), and [`wiki`][emacswiki]
+  (for packages from Emacswiki.org).
+
+  - The `bitbucket` fetcher derives from `hg`, so you have to use
+    `git` for Git repositories hosted on Bitbucket.
+
+  - The `wiki` fetcher gets the latest version from
+    `http://www.emacswiki.org/emacs/download/<NAME>.el` where `NAME`
+    is the package name.  Note that the `:url` property is not needed
+    for the `wiki` fetcher unless the name of the package file on the
+    EmacsWiki differs from the package name being built.  This fetcher
+    is deprecated due to security concerns.  Please distribute your
+    packages using a `git` or `hg` repository.
+
+  - Bazaar, CVS, Darcs, Fossil and Subversion used to be supported,
+    until only a dozen packages remained on Melpa that used one of
+    these five version control systems.  These packages are now
+    imported from the Emacsorphanage, which features semi-regularly
+    updated Git mirrors of the upstream non-Git repositories.  (The
+    latest stable `package-build.el` release actually still supports
+    these vcs.)
 
 - `:url`
 specifies the URL of the version control repository. *required for
-the `git`, `bzr`, `hg`, `darcs`, `fossil`, `svn` and `cvs` fetchers.*
+the `git`, and `hg` fetchers.*
 
 - `:repo` specifies the github/gitlab/bitbucket repository and is of the form
 `user/repo-name`. *required for the `github`, `gitlab`, and `bitbucket` fetchers*.
@@ -164,10 +165,6 @@ it adds the "origin/" prefix automatically.
   strip the "OTP-" prefix.  The captured portion of the regexp must be
   parseable by Emacs' `version-to-list` function.
 
-- `:module`
-specifies the module of a CVS repository to check out.  Defaults to to
-`package-name`.  Only used with `:fetcher cvs`, and otherwise ignored.
-
 - `:files` optional property specifying the elisp and info files used to build the
 package. Please do not override this if the default value (below) is adequate, which
 it should usually be:
@@ -198,12 +195,7 @@ subdirectories to keep packaging simple.
 [github]: https://github.com/
 [gitlab]: https://gitlab.com/
 [bitbucket]: https://bitbucket.org/
-[bzr]: http://bazaar.canonical.com/en/
 [hg]: https://www.mercurial-scm.org/
-[svn]: http://subversion.apache.org/
-[cvs]: http://www.nongnu.org/cvs/
-[darcs]: http://darcs.net/
-[fossil]: http://www.fossil-scm.org/
 [emacswiki]: http://www.emacswiki.org/
 
 

html/partials/getting-started.html

@@ -148,7 +148,9 @@ <h2>Development</h2>
       <p><a href="https://github.com/melpa/melpa">https://github.com/melpa/melpa</a></p>
       <p>
         Contributions are welcome. Currently, the builder supports
-        packages using Git, Subversion, Mercurial, Bazaar, CVS, Darcs, Fossil and
-        EmacsWiki (deprecated).
+        packages using Git, Mercurial, and EmacsWiki (deprecated
+        due to security concerns). Support for Bazaar, CVS, Darcs,
+        Fossil and Subversion has been removed due to very limited
+        use.
       </p>
     </section>

scripts/bootstrap

@@ -9,18 +9,13 @@ cd ${HOME}
 sudo ${SUDOENV} apt-get -y update
 sudo ${SUDOENV} apt-get -y upgrade
 sudo ${SUDOENV} apt-get -y install \
-    bzr \
     curl \
-    cvs \
-    darcs \
     emacs24 emacs24-el emacs24-common-non-dfsg \
-    fossil \
     git \
     make \
     mercurial \
     nginx \
     runit \
-    subversion \
     texinfo \
     tmux