btrfs-progs: ci: install RTD sphinx theme for devel workflow

With the recent updates to documentation build the theme must be now
installed as a package. Disable building documentation in all workflows
that do functional tests.

Signed-off-by: David Sterba <dsterba@suse.com>

.github/workflows/artifacts-static-build.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v3
       - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx libaio-dev liburing-dev
       - name: Configure
-        run: ./autogen.sh && ./configure
+        run: ./autogen.sh && ./configure --disable-documentation
       - name: Make static
         run: make V=1 EXTRA_CFLAGS='-march=x86-64' static
       - name: Make box.static

.github/workflows/coverage.yml

@@ -16,7 +16,7 @@ jobs:
       - run: sudo modprobe btrfs
       - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx libaio-dev liburing-dev attr jq lcov
       - name: Configure
-        run: ./autogen.sh && ./configure
+        run: ./autogen.sh && ./configure --disable-documentation
       - name: Make
         run: make V=1 D=gcov
       - name: Tests cli

.github/workflows/devel.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - run: sudo modprobe btrfs
-      - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx
+      - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx sphinx-rtd-theme-common python3-sphinx-rtd-theme
       - name: Configure
         run: ./autogen.sh && CC=${{ matrix.compiler}} ./configure
       - name: Documentation

.github/workflows/pull-request.yml

@@ -20,7 +20,7 @@ jobs:
       - run: sudo modprobe btrfs
       - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx libaio-dev liburing-dev attr jq
       - name: Configure
-        run: ./autogen.sh && ./configure
+        run: ./autogen.sh && ./configure --disable-documentation
       - name: Make
         run: make V=1
 #      - name: Musl build