[PATCH v2] travis-ci: build documentation

[larsxschneider@gmail.com]

From: Lars Schneider <larsxschneider@gmail.com>

Run "make doc" as separate Travis CI build job to check if all
documentation can be built without errors.

Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
---

diff to v1:
* add quick sanity check to documentation results (thanks Matthieu)
* fix typo in commits message (thanks Stefan)
* move 'make doc' into seperate Travis CI build job (thanks Peff)
* started to move CI helper scripts to /ci (thanks Matthieu & Junio)

I really like the idea of the "/ci" directory. Over time I plan to
migrate all non Travis-CI related code from .travis.yml to this directory.
This would ease the transition to or parallel execution with another CI
system (e.g. GitLab CI to test Git on Windows).

Thanks,
Lars


 .travis.yml              | 15 +++++++++++++++
 ci/test-documentation.sh | 23 +++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100755 ci/test-documentation.sh

diff --git a/.travis.yml b/.travis.yml
index 78e433b..9f71d23 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,6 +32,21 @@ env:
     # t9816 occasionally fails with "TAP out of sequence errors" on Travis CI OS X
     - GIT_SKIP_TESTS="t9810 t9816"

+matrix:
+  include:
+    - env: Documentation
+      os: linux
+      compiler: clang
+      addons:
+        apt:
+          packages:
+          - asciidoc
+          - xmlto
+      before_install:
+      before_script: make doc
+      script: ci/test-documentation.sh
+      after_failure:
+
 before_install:
   - >
     case "${TRAVIS_OS_NAME:-linux}" in
diff --git a/ci/test-documentation.sh b/ci/test-documentation.sh
new file mode 100755
index 0000000..329ff4b
--- /dev/null
+++ b/ci/test-documentation.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Perform a quick sanity check on documentation generated with 'make doc'.
+#
+
+set -e
+
+test_file_count () {
+    SUFFIX=$1
+    EXPECTED_COUNT=$2
+    ACTUAL_COUNT=$(find Documentation -type f -name "*.$SUFFIX" | wc -l)
+    echo "$ACTUAL_COUNT *.$SUFFIX files found. $EXPECTED_COUNT expected."
+    test $ACTUAL_COUNT -eq $EXPECTED_COUNT
+}
+
+test -s Documentation/git.html
+test -s Documentation/git.xml
+test -s Documentation/git.1
+
+# The follow numbers need to be adjusted when new documentation is added.
+test_file_count html 233
+test_file_count xml 171
+test_file_count 1 152
--
2.5.1