[fractal] docs: Generate docs for ruma and matrix-sdk

[Kévin Commaille <kcommaille src gnome org>]

commit 1858eac5581efa00ffddf80b48528957462330fc
Author: Kévin Commaille <zecakeh tedomum fr>
Date:   Fri May 6 16:53:49 2022 +0200

    docs: Generate docs for ruma and matrix-sdk
    
    Also make links between crates work.
    
    Closes #1012

 .cargo/config.toml |  3 +++
 .gitlab-ci.yml     | 11 -----------
 README.md          |  2 +-
 src/meson.build    | 30 ++++++++++++++++++++++++++++--
 4 files changed, 32 insertions(+), 14 deletions(-)
---
diff --git a/.cargo/config.toml b/.cargo/config.toml
index 64d439663..c07abad2a 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,2 +1,5 @@
 [build]
 rustflags = ["--cfg", "ruma_identifiers_storage=\"Arc\""]
+
+[doc.extern-map.registries]
+crates-io = "https://docs.rs/";
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f2d68e94e..394028cb7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -137,17 +137,6 @@ pages:
   stage: doc
   tags:
     - flatpak
-  variables:
-    RUSTDOCFLAGS: >
-      -Z unstable-options
-      --enable-index-page
-      --extern-html-root-url=gio=https://gtk-rs.org/gtk-rs-core/stable/latest/docs/gio/
-      --extern-html-root-url=gsk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/gsk4/
-      --extern-html-root-url=gdk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/gdk4/
-      --extern-html-root-url=gtk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/gtk4/
-      --extern-html-root-url=glib=https://gtk-rs.org/gtk-rs-core/stable/latest/docs/glib/
-      
--extern-html-root-url=libadwaita=https://world.pages.gitlab.gnome.org/Rust/libadwaita-rs/stable/latest/docs/libadwaita/
-      --extern-html-root-url=matrix-sdk=https://matrix-org.github.io/matrix-rust-sdk/matrix_sdk
   script:
     - flatpak-builder --keep-build-dirs --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} 
flatpak_app --repo=repo ${BRANCH:+--default-branch=$BRANCH} ${MANIFEST_PATH}
     - echo "ninja src/doc" | flatpak-builder --disable-rofiles-fuse --build-shell=${FLATPAK_MODULE} 
flatpak_app ${MANIFEST_PATH}
diff --git a/README.md b/README.md
index a5f89042d..1f610eef4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Our chat 
room](https://img.shields.io/matrix/fractal-gtk:matrix.org?color=blue&label=%23fractal%3Agnome.org&logo=matrix)](https://matrix.to/#/#fractal:gnome.org)
 [![Our Gitlab 
project](https://img.shields.io/badge/gitlab.gnome.org%2F-GNOME%2FFractal-green?logo=gitlab)](https://gitlab.gnome.org/GNOME/fractal/)
-[![Our 
documentation](https://img.shields.io/badge/%F0%9F%95%AE-Docs-B7410E?logo=rust)](https://gnome.pages.gitlab.gnome.org/fractal/fractal/)
+[![Our 
documentation](https://img.shields.io/badge/%F0%9F%95%AE-Docs-B7410E?logo=rust)](https://gnome.pages.gitlab.gnome.org/fractal/)
 
 # Fractal
 
diff --git a/src/meson.build b/src/meson.build
index a8e9092b6..6e1597c3e 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -51,6 +51,32 @@ cargo_build = custom_target(
   ]
 )
 
+rustdoc_flags = ' '.join([
+  '-Zunstable-options',
+  '--enable-index-page',
+  '--extern-html-root-url=gio=https://gtk-rs.org/gtk-rs-core/stable/latest/docs/',
+  '--extern-html-root-url=glib=https://gtk-rs.org/gtk-rs-core/stable/latest/docs/',
+  '--extern-html-root-url=gsk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/',
+  '--extern-html-root-url=gdk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/',
+  '--extern-html-root-url=gtk4=https://gtk-rs.org/gtk4-rs/stable/latest/docs/',
+  
'--extern-html-root-url=libadwaita=https://world.pages.gitlab.gnome.org/Rust/libadwaita-rs/stable/latest/docs/',
+  '--cfg=docsrs',
+])
+doc_env = ['RUSTDOCFLAGS=' + rustdoc_flags ]
+doc_deps = [
+  '--package=ruma',
+  '--package=ruma-common',
+  '--package=ruma-client-api',
+  '--package=matrix-sdk',
+  '--package=matrix-sdk-base',
+  '--package=matrix-sdk-common',
+  '--package=matrix-sdk-crypto',
+  '--package=matrix-qrcode',
+  '--package=matrix-sdk-sled',
+  '--package=matrix-sdk-store-encryption',
+  '--package=fractal',
+]
+
 cargo_doc = custom_target(
     'cargo-doc',
     build_by_default: false,
@@ -58,8 +84,8 @@ cargo_doc = custom_target(
     output: 'doc',
     console: true,
     command: [
-      'env', cargo_env,
+      'env', cargo_env + doc_env,
       cargo, 'doc',
-      cargo_options + ['--no-deps', '--document-private-items'],
+      cargo_options + doc_deps + ['--no-deps', '--document-private-items', '-Zrustdoc-map'] ,
     ],
   )