Add initial build script

3 files changed, 171 insertions, 1 deletions

diff --git a/README.md b/README.md
index 673c90e..e4e590e 100644
--- a/README.md
+++ b/README.md
@@ -62,3 +62,18 @@ Inside this repository are 6 major components:
 5. Script infrastructure to handle coordinating builds from the main repos on a release trigger.
 
 6. The GitHub Actions CI to build all the above.
+
+## Design Decisions
+
+### Debian/Ubuntu Packages
+
+* Unified package build: this entire repo is the "source" and the source package is named "jellyfin".
+
+   This was chosen to simplify the source package system and simplify building. Now, there is only a single "jellyfin" source package rather than 2. There may be more in the future as other repos might be included (e.g. "jellyfin-ffmpeg", "jellyfin-vue", etc.)
+
+   We believe this setup provides better flexibility long-term, for instance allowing rebuilds of a Debian package for configuration changes or build errors, even if the underlying code versions haven't changed.
+
+   We believe this setup provides easier manageability *vis-a-vis* CI, as only a single CI repo is required for both (or all) source repos.
+
+### Docker
+
diff --git a/build.py b/build.py
new file mode 100755
index 0000000..460bdfd
--- /dev/null
+++ b/build.py
@@ -0,0 +1,155 @@
+#!/usr/bin/env python3
+
+# build.py - Build packages in a Docker wrapper
+#
+# Part of the Jellyfin CI system
+###############################################################################
+
+from datetime import datetime
+from email.utils import format_datetime, localtime
+from os import system
+import os.path
+from subprocess import run, PIPE
+import sys
+
+from git import Repo
+
+try:
+    target_release = sys.argv[1]
+except IndexError:
+    target_release = "master"
+
+# Determine top level directory of this repository ("jellyfin-packaging")
+revparse = run(["git", "rev-parse", "--show-toplevel"], stdout=PIPE)
+repo_root_dir = revparse.stdout.decode().strip()
+
+def build_package_deb(jvers, btype, barch, bvers):
+    try:
+        ostype = btype if btype in configurations.keys() else None
+        if ostype is None:
+            raise ValueError(f"{btype} is not a valid OS type in {configurations.keys()}")
+        osversion = bvers if bvers in configurations[btype]['releases'] else None
+        if osversion is None:
+            raise ValueError(f"{bvers} is not a valid {btype} version in {configurations[btype]['releases']}")
+        dockerfiles = configurations[btype]['files'][barch] if barch in configurations[btype]['files'].keys() else None
+        if dockerfiles is None:
+            raise ValueError(f"{barch} is not a valid {btype} {bvers} architecture in {configurations[btype]['files'].keys()}")
+    except Exception as e:
+        print(f"Invalid/unsupported arguments: {e}")
+        exit(1)
+
+    # Set the cross-gcc version
+    crossgccvers = configurations[btype]['cross-gcc'][bvers]
+
+    # Prepare the debian changelog file
+    changelog_src = f"{repo_root_dir}/debian/changelog.in"
+    changelog_dst = f"{repo_root_dir}/debian/changelog"
+
+    with open(changelog_src) as fh:
+        changelog = fh.read()
+
+    if "v" in jvers:
+        comment = f"Jellyfin release {jvers}, see https://github.com/jellyfin/jellyfin/releases/{jvers} for details."
+    else:
+        comment = f"Jellyin unstable release {jvers}."
+
+    changelog = changelog.format(
+        package_version=jvers.replace('v', ''),
+        package_build=f"{btype[:3]}{bvers.replace('.', '')}",
+        release_comment=comment,
+        release_date=format_datetime(localtime())
+    )
+
+    with open(changelog_dst, "w") as fh:
+        fh.write(changelog)
+
+    # Build the dockerfile(s) and packages
+    for dockerfile in dockerfiles:
+        imagename = f"jellyfin-builder-{btype}-{barch}-{bvers}-{abs(hash(dockerfile))}"
+        os.system(f"docker build --progress=plain --build-arg PTYPE={ostype} --build-arg PVERSION={osversion} --build-arg PARCH={barch} --build-arg GCC_VERSION={crossgccvers} --file {repo_root_dir}/{dockerfile} --tag {imagename} {repo_root_dir}")
+        os.system(f"docker run --volume {repo_root_dir}:/jellyfin --volume {repo_root_dir}/out:/dist --name {imagename} {imagename}")
+
+    # Clean up the docker containers and images
+    for dockerfile in dockerfiles:
+        imagename = f"jellyfin-builder-{btype}-{barch}-{bvers}-{abs(hash(dockerfile))}"
+        os.system(f"docker rm {imagename}")
+        os.system(f"docker image rm {imagename}")
+
+def build_package(btype, barch, bvers):
+    pass
+
+def build_docker(ostype, osversion, dockerfiles):
+    pass
+
+# Define a map of possible configurations
+configurations = {
+    "debian": {
+        "files": {
+            "amd64": [ "debian/docker/Dockerfile" ],
+            "arm64": [ "debian/docker/Dockerfile" ],
+            "armhf": [ "debian/docker/Dockerfile" ],
+        },
+        "releases": [ "11", "12" ],
+        "def": build_package_deb,
+        "cross-gcc": {
+            "11": "10",
+            "12": "12",
+        },
+    },
+    "ubuntu": {
+        "files": {
+            "amd64": [ "debian/docker/Dockerfile" ],
+            "arm64": [ "debian/docker/Dockerfile" ],
+            "armhf": [ "debian/docker/Dockerfile" ],
+        },
+        "releases": [ "20.04", "22.04" ],
+        "def": build_package_deb,
+        "cross-gcc": {
+            "20.04": "10",
+            "22.04": "12",
+            "24.04": "12",
+        },
+    },
+    "fedora": {
+        "def": build_package,
+    },
+    "centos": {
+        "def": build_package,
+    },
+    "linux": {
+        "def": build_package,
+    },
+    "windows": {
+        "def": build_package,
+    },
+    "macos": {
+        "def": build_package,
+    },
+    "portable": {
+        "def": build_package,
+    },
+    "docker": {
+        "def": build_docker,
+    },
+}
+
+def usage():
+    print(f"{sys.argv[0]} JVERS BTYPE BARCH [BVERS]")
+    print(f" JVERS: The Jellyfin version being built")
+    print(f" BTYPE: A valid build OS type")
+    print(f" BARCH: A valid build OS CPU architecture")
+    print(f" BVERS: A valid build OS version (packaged OS types only)")
+
+try:
+    jvers = sys.argv[1]
+    barch = sys.argv[2]
+    btype = sys.argv[3]
+except IndexError:
+    usage()
+    exit(1)
+try:
+    bvers = sys.argv[4]
+except IndexError:
+    bvers = None
+
+configurations[btype]['def'](jvers, btype, barch, bvers)
diff --git a/checkout.py b/checkout.py
index c491fd5..5b25758 100755
--- a/checkout.py
+++ b/checkout.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # checkout.py - Checkout submodules for a build (checkout a given tag or head)
 #