NAME: specter
DESCRIPTION:
specter is a personification of a spec file.
It works as a CLI command to simplify the RPM creation while dealing with the depencencies for build an RPM successfully.
Real life problem example:
- You are working to build a rust project from crates using rust2rpm. So the first you need the crates source package.
In such situation when doing manually you might do those actions:
* Download the Sources and create the spec file:
Manual Solution:
```bash
(cd $BUILD_ROOT/SOURCES/; curl -o foo.0.1.0.crates https://api.crates.io/download/foo.0.1.0.crates)
rust2rpm foo 0.1.0
```
Specter Solution:
```bash
specter getcrate -p foo -v 0.1.0 -d $BUILD_ROOT/SOURCES/
rust2rpm foo 0.1.0
```
* Build the spec file:
Manual Solution:
```bash
rpmbuild -ba foo.spec
```
_Since this will not have the BuildRequires it might fail asking to install the needed dependencies such as:_
```bash
Error while building the dependencies:
(crate(bar/default) >= 0.1.0 with crate(bar/default) < 0.2.0~) is needed by foo-0.1.0.rpm
```
Specter Solution:
Specter helps to solve this by finding the crates dependencies and declaring it
Example:
```bash
specter generate -i foo.spec -o buildrequires.txt
cat buildrequires.txt
BuildRequires: rust-bar+default-devel >= 0.1.0, rust-bar+default-devel < 0.2.0
```
With this result you can easly update the `foo.spec` with this out put.
* Install the dependencies:
Problem:
After declare the BuildRequires you might have this output when build:
```bash
error: Failed build dependencies:
rust-bar+default-devel is needed by rust-foo+default-devel-1.fc38.x86_64
```
Manual Solution:
```bash
dnf -y install rust-bar+default-devel
```
_this action might be executed for each missing package_
Specter Solution:
```bash
specter install -i buildrequires.txt # install all the package dependencies
specter search -i buildrequires.txt # search for the requirements
specter search -i buildrequires.txt -o install-list.txt # generate a list of packages found in the system
```
* Install the Missing packages:
Problem:
Some packages were not installed because they are missing in the distro, you might need to build them as well,
those are called the subpackage dependencies.
Manual Solution:
```bash
dnf -y search rust-bar|grep -E "rust-bar[?\+0-3]"
Found: rust-bar0.2+default-devel
```
Fix the build requires:
```
# vim foo.spec diff
...
...
+++ BuildRequires: rust-bar0.2+default-devel
--- BuildRequires: rust-bar+default-devel
...
...
```
```bash
dnf -y install rust-bar0.2+default-devel
```
Specter Soltion:
```bash
specter search -m -v "0-3" -i foo.spec -o mreq.txt # search specific package version and generate the file with the found BuildRequires
specter install -m -i mreq.txt # install missing requirements
```