[cmake] refactor: cpmfile, deps prefetch, force system and more (#322)

CPM Dependencies are now managed in a singular json file, where each can be properly prefetched at-will via `tools/cpm-fetch.sh <packages...>`, or all at once via `tools/cpm-fetch-all.sh`.

Adds docs for CPMUtil as well.

Also adds `<package>_FORCE_{BUNDLED,SYSTEM}` overrides

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/322
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/externals/ffmpeg/cpmfile.json b/externals/ffmpeg/cpmfile.json
new file mode 100644
index 0000000000..dd9179703e
--- /dev/null
+++ b/externals/ffmpeg/cpmfile.json
@@ -0,0 +1,8 @@
+{
+    "ffmpeg": {
+        "repo": "FFmpeg/FFmpeg",
+        "sha": "c2184b65d2",
+        "hash": "2a89d664119debbb3c006ab1c48d5d7f26e889f4a65ad2e25c8b0503308295123d5a9c5c78bf683aef5ff09acef8c3fc2837f22d3e8c611528b933bf03bcdd97",
+        "bundled": true
+    }
+}