solver3: Use zstd-compressed, base64-encoded dumps

Store the solver dumps with zstd compression and base64-encode
them in the crash report; such that they take up significantly
less space and can fit in cassandra's schema.

Base64 is wrapped at 76 characters as the base64 tool does. Do
some magic std::string_view conversion to avoid string copies
for the substr() used to get 76 characters at a time.

Note we can rely on substr(i, 76) to handle less than 76 characters
just fine; it uses std::min(76, size() - i) characters.

1 files changed, 2 insertions, 94 deletions

diff --git a/test/integration/test-solver3-evaluation b/test/integration/test-solver3-evaluation
index a873d5b21..b05e7cb9b 100755
--- a/test/integration/test-solver3-evaluation
+++ b/test/integration/test-solver3-evaluation
@@ -32,99 +32,7 @@ Title: Failure: The 3.0 solver produced a worse result
 SourcePackage: apt
 ErrorMessage:
 AptSolverDump:
- Request: EDSP 0.5
- Architecture: amd64
- Architectures: amd64
- Machine-ID: 912e43bd1c1d4ba481f9f8ccab25f9ee
- Install: x:amd64 y:amd64
- Solver: internal
- 
- Package: a
- Architecture: all
- Version: 3
- APT-ID: 2
- Source: a
- Source-Version: 3
- Priority: optional
- Section: other
- Size: 42
- APT-Release:
-  a=unstable,n=sid,c=main,b=all
- APT-Pin: 500
- APT-Candidate: yes
- Depends: c
- 
- Package: b
- Architecture: all
- Version: 3
- APT-ID: 3
- Source: b
- Source-Version: 3
- Priority: optional
- Section: other
- Size: 42
- APT-Release:
-  a=unstable,n=sid,c=main,b=all
- APT-Pin: 500
- APT-Candidate: yes
- 
- Package: c
- Architecture: all
- Version: 3
- APT-ID: 4
- Source: c
- Source-Version: 3
- Priority: optional
- Section: other
- Size: 42
- APT-Release:
-  a=unstable,n=sid,c=main,b=all
- APT-Pin: 500
- APT-Candidate: yes
- 
- Package: x
- Architecture: all
- Version: 3
- APT-ID: 0
- Source: x
- Source-Version: 3
- Priority: optional
- Section: other
- Size: 42
- APT-Release:
-  a=unstable,n=sid,c=main,b=all
- APT-Pin: 500
- APT-Candidate: yes
- Depends: a | b
- 
- Package: y
- Architecture: all
- Version: 3
- APT-ID: 1
- Source: y
- Source-Version: 3
- Priority: optional
- Section: other
- Size: 42
- APT-Release:
-  a=unstable,n=sid,c=main,b=all
- APT-Pin: 500
- APT-Candidate: yes
- Depends: b | a
- 
- Package: apport
- Architecture: all
- Version: 3
- APT-ID: 6
- Source: apport
- Source-Version: 3
- Priority: optional
- Section: other
- Installed: yes
- APT-Pin: 100
- APT-Candidate: yes
- " cat rootdir/var/crash/apt-edsp.$(id -u).crash
-
+$(cat rootdir/var/log/apt/edsp.log.zst | base64 | sed 's#^# #')" cat rootdir/var/crash/apt-edsp.$(id -u).crash
 
 testsuccessequal "Request: EDSP 0.5
 Architecture: amd64
@@ -217,7 +125,7 @@ Section: other
 Installed: yes
 APT-Pin: 100
 APT-Candidate: yes
-" cat rootdir/var/log/apt/edsp.log
+" apthelper cat-file rootdir/var/log/apt/edsp.log.zst
 
 testfailureequal "Reading package lists...
 Building dependency tree...