Make it possible to get new provides from RPM files

Author: frenzymadness

README.md

@@ -12,28 +12,49 @@ Requires `libdnf5` (system package, not from PyPI) and configured Fedora reposit
 
 ## Usage
 
+### Check RPM files (recommended)
+
+Check actual RPM files from a build before pushing to repositories:
+
+```bash
+fedora-revdep-check --rpms /path/to/build/*.rpm [options]
+fedora-revdep-check --rpm-dir /path/to/build/RPMS/noarch/ [options]
+```
+
+This reads the actual provides from the RPM files, including their exact versions, which is more accurate than simulating version changes.
+
+### Simulate version change (legacy mode)
+
+Simulate updating a package to a new version:
+
 ```bash
 fedora-revdep-check <srpm-name> <new-version> [options]
 ```
 
+**Note**: This mode assumes all binary RPMs and their provides will have the same version, which may not always be accurate.
+
 ### Examples
 
 ```bash
-# Check rawhide (default)
-fedora-revdep-check jupyterlab 4.7.0
+# Check RPM files from a build (recommended)
+fedora-revdep-check --rpms ~/rpmbuild/RPMS/noarch/*.rpm
+fedora-revdep-check --rpm-dir ~/koji-download/python-sphinx-9.1.0-1.fc45/
 
-# Verbose output
+# Legacy mode: simulate version change
+fedora-revdep-check jupyterlab 4.7.0
 fedora-revdep-check pytest 8.0.0 --verbose
 
 # Use stable Fedora instead of rawhide
-fedora-revdep-check numpy 2.0.0 --repo fedora --repo fedora-source
+fedora-revdep-check --rpms *.rpm --repo fedora --repo fedora-source
 
 # Check specific Fedora version
 fedora-revdep-check python-requests 2.32.0 --repo fedora-40 --repo fedora-40-source
 ```
 
 ### Options
 
+- `--rpms FILE [FILE ...]` - RPM file(s) to check
+- `--rpm-dir DIR` - Directory containing RPM files to check
 - `-v, --verbose` - Show detailed analysis
 - `-r, --repo <repo-id>` - Repository to enable (can be specified multiple times, default: rawhide, rawhide-source, koji, and koji-source)
 
@@ -70,14 +91,25 @@ The tool distinguishes between:
 
 ## How It Works
 
-1. Finds all binary packages built from the SRPM
-2. Extracts their provides (excluding bundled)
+### RPM File Mode (Recommended)
+
+1. Reads RPM files and extracts their provides with actual versions
+2. Determines the source package name from the RPM headers
+3. Finds reverse dependencies for each provide in Fedora repositories
+4. Checks if each requirement would be satisfied by the provides in the RPM files
+5. Reports packages that would fail to build or install
+
+### Legacy Mode (Version Simulation)
+
+1. Finds all binary packages built from the SRPM in repositories
+2. Extracts their provides and simulates them with the new version
 3. Finds reverse dependencies for each provide
-4. Filters to latest versions only (no duplicates)
-5. Checks if the new version satisfies all requirements
-6. Reports packages that would fail to build or install
+4. Checks if the simulated new version satisfies all requirements
+5. Reports packages that would fail to build or install
+
+**Note**: Both modes automatically exclude packages from the same SRPM (they'll be updated together).
 
-Packages from the same SRPM are automatically excluded (they'll be updated together).
+**Note**: Both modes distinguish between new conflicts and already-broken packages to avoid false positives.
 
 ## Development