feat(yt-dlp): configurable binary path and diagnostics for persistent 403s - #422
feat(yt-dlp): configurable binary path and diagnostics for persistent 403s#422megabyte0x wants to merge 7 commits into
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cliamp always ran the first yt-dlp on PATH. Distributions sometimes ship a yt-dlp that is months behind upstream (Arch Linux ARM is currently 8 months behind), and YouTube stops working with old versions quickly. The only workaround was shadowing the packaged binary earlier in PATH, which is not possible without root on most setups. Resolve the binary through internal/ytdlbin instead: CLIAMP_YTDLP, then the ytdlp_path config key, then "yt-dlp" from PATH. Every caller in player, resolve, and the NetEase provider goes through it, so playback, playlist expansion, downloads, and cookie extraction all use the same binary. Not-found errors now name the binary that was tried.
A single 403 is transient and already retried. A 403 that survives every retry is almost always local: yt-dlp is too old to sign the media URL, or it has no JavaScript runtime to solve the challenge that produces the signature. Neither shows up in yt-dlp's error text, so the user only sees "HTTP Error 403: Forbidden" and has nothing to act on. Probe the binary once (`yt-dlp -v --simulate`, no URL, no network) after the retry budget is spent and append what it found: the release age when yt-dlp is older than 90 days, and a pointer to deno when the JS runtime list is "none". The probe result is cached for 10 minutes so updating yt-dlp and retrying in the same session clears the hint. The original error stays wrapped.
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📝 WalkthroughWalkthroughThe change adds configurable yt-dlp selection through Changesyt-dlp control
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to Tracks whose yt-dlp process exits slowly after PCM EOF can pause playback and delay controls for up to three seconds. This should be corrected before merge. Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant ConfigLoader
participant main.run
participant ytdlbin
participant yt-dlp
ConfigLoader->>main.run: load ytdlp_path
main.run->>ytdlbin: Configure(cfg.YtdlpPath)
ytdlbin->>ytdlbin: resolve CLIAMP_YTDLP, ytdlp_path, or PATH
main.run->>ytdlbin: create provider or playback command
ytdlbin->>yt-dlp: invoke selected binary
yt-dlp-->>main.run: output, warning, or error
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 50.77% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 65 functions across 16 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches 💡 1⚔️ Resolve merge conflicts 💡
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Inline comments:
In `@docs/configuration.md`:
- Line 98: Update the default configuration’s ytdlp_path entry to be empty or
omitted so yt-dlp is resolved via PATH, while preserving the user-local path
only in the override example in docs/yt-dlp.md.
In `@external/netease/provider.go`:
- Line 438: Update the missing-binary error handling around ytdlbin.LookPath to
include the selected executable name from ytdlbin.Name(), rather than always
reporting only “yt-dlp”; preserve the existing behavior while making configured
CLIAMP_YTDLP or ytdlp_path values visible in the error.
In `@player/ytdl.go`:
- Around line 36-38: Update YTDLPAvailable and the startup installation flow to
treat a missing explicit selection as invalid: when ytdlbin.Name() differs from
ytdlbin.DefaultName, do not invoke InstallYTDLP(). Preserve standard
installation only for the default yt-dlp selection, and ensure the explicit path
remains reported unavailable.
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config.toml.exampleconfig/config.goconfig/config_test.godocs/configuration.mddocs/yt-dlp.mdexternal/netease/provider.gointernal/ytdlbin/ytdlbin.gointernal/ytdlbin/ytdlbin_test.gomain.goplayer/ytdl.goplayer/ytdl_diagnose.goplayer/ytdl_diagnose_test.goplayer/ytdl_test.goresolve/resolve.goresolve/ytdl_playlists.gosite/index.html
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Addressed all three review findings in ef7e24d:
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Review follow-ups: - A missing binary chosen by ytdlp_path or CLIAMP_YTDLP no longer reads as a missing installation. ytdlbin.NotFoundError names the binary and the setting that selected it; the PATH default keeps its previous wording. - Startup no longer offers to install yt-dlp on PATH when an explicit binary is pinned, because the pinned path keeps precedence and the install would not be used. It asks for the path to be fixed instead. - The config example in docs/configuration.md keeps ytdlp_path commented out so copying the block does not pin a path that may not exist.
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Inline comments:
In `@internal/ytdlbin/ytdlbin.go`:
- Line 76: Update the not-found diagnostic in the ytdlbin Name flow to derive
its message from the selector state, preserving explicit CLIAMP_YTDLP and
ytdlp_path selections even when they resolve to DefaultName; retain the PATH
wording only for an unselected default. Add regression cases covering both
explicit selectors.
In `@resolve/resolve.go`:
- Line 677: At all three lookup-error sites—resolve/resolve.go lines 677-677 and
766-766, and resolve/ytdl_playlists.go line 98-98—wrap and return the original
error from ytdlbin.LookPath instead of replacing it with
ytdlbin.NotFoundError(), while preserving the existing installation guidance and
selected-binary diagnostics so errors.Is/errors.As continue to work.
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The configurable-binary direction looks right, but please remove the separate persistent-403 health probe. The playback command suppresses yt-dlp’s native stale-version and JS-runtime warnings with --no-warnings, then adds roughly 360 lines, including tests, to reproduce them. The final failed attempt already returns captured stderr, so keeping the existing retry and removing --no-warnings surfaces those diagnostics without another subprocess that can take up to 10 seconds. It also avoids attaching YouTube-specific advice to 403s from SoundCloud, Bandcamp, Bilibili, and other yt-dlp sources. Please update the matching claims in docs/yt-dlp.md and site/index.html.
| // to skip to the desired position in the input stream. | ||
| func decodeYTDLPipe(pageURL string, sr beep.SampleRate, bitDepth, startSec int) (*ytdlPipeStreamer, beep.Format, error) { | ||
| if _, err := exec.LookPath("yt-dlp"); err != nil { | ||
| if _, err := ytdlbin.LookPath(); err != nil { |
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decodeYTDLPipe discards the selector-aware missing-binary diagnostic and always suggests installing the default binary. That cannot fix a missing non-default CLIAMP_YTDLP or ytdlp_path value because the override keeps precedence. Preserve the selected value/source, and append install guidance only when the selected command is the bare yt-dlp PATH lookup. Apply the same rule to the NetEase and resolve guards that currently append install advice.
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Done in 64f5447, extended in 4df821a. decodeYTDLPipe now returns ytdlbin.NotFoundErrorWithAdvice(err, "install: "+YtdlpInstallHint()), which keeps the selected value and its source and appends install advice only when the command still resolves through PATH. The NetEase cookie guard, resolveYTDLRangePageContext, and FetchUserPlaylists use the same helper, and DownloadYTDL uses the bare NotFoundError. 4df821a also handles the case where the selector itself holds a bare yt-dlp: the message then says not found in PATH (selected by CLIAMP_YTDLP) and keeps the install advice, because a PATH install does fix that one. Covered by TestDecodeYTDLPipeNamesSelectedBinary, TestExtractBrowserCookieHeaderNamesSelectedYTDLP, and the internal/ytdlbin tables.
| } | ||
| t.Setenv("YTDL_ATTEMPTS", attemptsPath) | ||
| t.Setenv("YTDL_MODE", mode) | ||
| t.Setenv("YTDL_FAKE_VERSION", time.Now().Format("2006.01.02")) |
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Please clear CLIAMP_YTDLP in fake-yt-dlp fixtures. It outranks PATH, so developers with this variable set bypass the fixture and may invoke a real binary/network. I reproduced failures in the player, resolve, and YouTube Music tests with the variable set.
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Done in 64f5447. installYTDLRetryFixtures (player), TestResolveYTDLBatchCookieSelection (resolve), and both fake-yt-dlp tests in external/ytmusic now t.Setenv(ytdlbin.EnvVar, "") after prepending the fixture dir to PATH.
I reproduced your report first: with CLIAMP_YTDLP pointing at a stub binary, player, resolve, and external/ytmusic failed on the parent commit and pass after the change (CLIAMP_YTDLP=/tmp/real-yt-dlp go test ./... is green now). The player fixtures also gained a t.Cleanup that fails the test if the playback command ever passes --no-warnings again.
The playback command passed --no-warnings, which hid exactly the two things that explain a persistent HTTP 403: yt-dlp's "version is older than 90 days" warning and its missing-JS-runtime warning. A separate health probe then re-derived both by running yt-dlp a second time. Drop --no-warnings and delete the probe. --quiet still drops progress chatter, warnings still go to stderr, and the final failed attempt already returns that stderr, so the diagnostics reach the UI without another subprocess and without attaching YouTube-specific advice to a 403 from SoundCloud, Bandcamp, or Bilibili. Missing-binary errors now keep the selector-aware diagnostic: install advice is appended only for the bare PATH lookup, because an explicit ytdlp_path or CLIAMP_YTDLP keeps precedence over anything installed on PATH. Fake yt-dlp fixtures clear CLIAMP_YTDLP so a developer with it set does not bypass the fixture and reach a real binary.
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Thanks — all three points addressed in 64f5447. Removed the health probe. Warnings go to stderr, so they do not disturb the audio on stdout, and The retry-budget test keeps the coverage: the fixture prints a stale-version WARNING before the 403 and the test asserts it reaches the returned error, plus a Selector-aware missing-binary errors. Added Fixtures clear
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
In `@external/netease/provider.go`:
- Line 439: The Netease provider currently formats user-facing installation
advice without the required context. In the provider lookup path, replace
NotFoundErrorWithAdvice with a wrapped lookup error that preserves the
selected-binary details, then update the application boundary in run to format
the installation advice and include the netease context.
In `@internal/ytdlbin/ytdlbin.go`:
- Line 89: Make missing-binary errors non-presentational by removing
installation guidance from NotFoundErrorWithAdvice in
internal/ytdlbin/ytdlbin.go and updating the callers in player/ytdl.go,
resolve/resolve.go, and resolve/ytdl_playlists.go to return only missing-binary
context with selector metadata; add final installation messaging only at main.go
or run(...) boundaries, and update the assertion in
internal/ytdlbin/ytdlbin_test.go to match the non-presentational error contract.
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docs/yt-dlp.mdexternal/netease/provider.goexternal/netease/provider_test.goexternal/ytmusic/cookie_provider_test.gointernal/ytdlbin/ytdlbin.gointernal/ytdlbin/ytdlbin_test.goplayer/ytdl.goplayer/ytdl_test.goresolve/resolve.goresolve/resolve_test.goresolve/ytdl_playlists.gosite/index.html
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have a look at the coderabbit findings + a couple of comments from me :) thanks!
| `HTTP Error 403: Forbidden` means the source rejected the media URL yt-dlp | ||
| handed to cliamp. A single 403 is usually transient, and cliamp retries the | ||
| track automatically. When every retry fails, cliamp shows yt-dlp's own output | ||
| for the last attempt, including any warnings it printed. On YouTube the cause |
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These troubleshooting steps are too narrow, and the commands below can inspect a different binary than cliamp uses. Current yt-dlp needs both a supported JavaScript runtime and EJS components for full YouTube support; missing PO tokens can also cause 403s. Please say “common causes include,” mention yt-dlp[default]/yt-dlp-ejs, link the PO-token guide, and show diagnostics using the binary selected by CLIAMP_YTDLP or ytdlp_path.
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Rewritten in 4df821a. The section now reads "On YouTube, common causes include:" and lists four:
- outdated yt-dlp (yt-dlp's own
Your yt-dlp version (X) is older than 90 days!warning), - no JavaScript runtime (
No supported JavaScript runtime could be found, links the EJS guide), - missing EJS components — names yt-dlp-ejs,
pip install -U "yt-dlp[default]", notes that official binaries bundle the scripts while distro packages may ship an old one or none, and points at--remote-components, - missing PO token, linking the PO token guide.
The diagnostics now target the binary cliamp runs rather than the shell's first yt-dlp:
# $CLIAMP_YTDLP, else the ytdlp_path from config.toml, else yt-dlp on PATH
YTDLP="${CLIAMP_YTDLP:-yt-dlp}" # or: YTDLP=~/.local/bin/yt-dlp
"$YTDLP" --version
"$YTDLP" -v --simulate 'https://www.youtube.com/watch?v=dQw4w9WgXcQ'with the annotated -v header (version, yt_dlp_ejs-… in Optional libraries, JS runtimes:, [pot] PO Token Providers:) taken from a real run here.
| # Logs are written to ~/.config/cliamp/cliamp.log | ||
| log_level = "info" | ||
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| # yt-dlp binary to run (default: "yt-dlp" from PATH) |
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This new selection mechanism makes the existing “Requires yt-dlp on PATH” statement at line 232 stale. Suggested wording: “Requires an executable yt-dlp, selected by CLIAMP_YTDLP, ytdlp_path, or PATH.”
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Done in 4df821a — line 232 now reads: "Requires an executable yt-dlp, selected by CLIAMP_YTDLP, ytdlp_path, or PATH. See yt-dlp.md."
The same statement was stale in four other places, so those got the selection mechanism too: docs/soundcloud.md (intro + Requirements), docs/netease.md, docs/mixcloud.md, and docs/youtube-music.md.
… errors `ytdlbin.LookPath` returns an *exec.Error that unwraps to exec.ErrNotFound or fs.ErrNotExist. The guards replaced it wholesale, so errors.Is/As stopped seeing the lookup failure. NotFoundError now takes that cause and keeps it behind an Unwrap, while Error() stays the short line the TUI shows. A selector holding a bare "yt-dlp" also resolved to DefaultName, so the error read "not found in PATH" and hid the setting that chose it. The message is now derived from the selector state, and install advice is kept for that case because a PATH install does fix it. Docs: the 403 section now says "common causes include", covers EJS components (yt-dlp[default] / yt-dlp-ejs) and PO tokens next to the version and runtime cases, and runs the diagnostics against $CLIAMP_YTDLP / ytdlp_path instead of whatever `yt-dlp` the shell resolves. The "Requires yt-dlp on PATH" lines in configuration.md, soundcloud.md, netease.md, mixcloud.md, and youtube-music.md now mention the selection mechanism.
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Pushed 4df821a covering your two comments plus the outstanding CodeRabbit findings. docs/yt-dlp.md — the 403 section now says "On YouTube, common causes include:" and lists outdated yt-dlp, no JavaScript runtime, missing EJS components (yt-dlp-ejs, docs/configuration.md:232 — now "Requires an executable yt-dlp, selected by CodeRabbit findings
While confirming the
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@gjermundgaraba could you have a look at this |
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Binary selection works (checked with broken pins and a fake yt-dlp). Two playback issues still need fixing: the one-row TUI error display hides the fatal diagnostic behind the first warning, and the retry classifier treats 403s in warnings as retryable failures. Both are reproduced; details inline, along with documentation corrections and a minor diagnostic wording suggestion.
The PR description still describes the probe and its test, removed in 64f5447.
| // --quiet drops progress chatter but keeps warnings on stderr. Do not | ||
| // add --no-warnings: yt-dlp's own "version is older than 90 days" and | ||
| // missing-JS-runtime warnings are what explain a persistent HTTP 403, | ||
| // and monitorExit surfaces this stderr in the failing error. |
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The TUI renders this error in one terminal row, and the playback error is not logged. With a version warning before the fatal diagnostic, the status shows the warning and drops the 403. The same happens with unrelated failures such as ERROR: Video unavailable. Please prioritize the fatal diagnostic in the status line and make the full warnings available, for example in the log. Update the matching claims in docs/yt-dlp.md and the site card to describe what users can actually read.
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| if err := prefillYTDLPipe(decoder); err != nil { | ||
| if attempt == ytdlPipelineMaxAttempts || !isTransientYTDL403(err) { | ||
| if !isTransientYTDL403(err) { |
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isTransientYTDL403 searches the full stderr text, including warnings. I reproduced three attempts with WARNING: extractor fallback: HTTP Error 403: Forbidden followed by ERROR: Video unavailable, although the fatal failure is permanent. Please classify the fatal diagnostic, excluding warnings, so a warning mentioning 403 cannot trigger retries.
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| ```toml | ||
| # ~/.config/cliamp/config.toml | ||
| ytdlp_path = "~/.local/bin/yt-dlp" |
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Please say: "Place ytdlp_path at the top level, before the first [section] header." Appending this example under an existing provider section such as [soundcloud] silently ignores the setting. Also, the comment above YTDLP="${CLIAMP_YTDLP:-yt-dlp}" describes a config fallback that the shell assignment does not implement. Explicitly tell users with ytdlp_path configured to assign that path to YTDLP, so the diagnostic command checks the binary cliamp uses.
| } | ||
| default: | ||
| return ¬FoundError{ | ||
| msg: fmt.Sprintf("yt-dlp not found at %s (selected by %s)", name, source), |
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Minor, non-blocking: an existing non-executable file or directory also produces "not found at". I reproduced both cases. Consider matching the startup notice's "missing or not executable" wording so users can distinguish an unusable selection from a missing installation.
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Inline comments:
In `@player/ytdl.go`:
- Line 186: Move the post-EOF waitCause call out of ytdlPipeStreamer.Stream so
Stream returns immediately when streamFromReader yields (0, false) without an
error. Run the ytdlCauseGrace diagnostic wait asynchronously or in a monitor,
publish its result safely, and preserve the existing diagnostic behavior without
holding the speaker lock or delaying pipeline promotion.
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thanks! a couple more comments and there are some merge conflicts to resolve too
| select { | ||
| case e := <-y.ytdlErr: | ||
| ytdlErr = e | ||
| case e := <-y.ffmpegErr: | ||
| ffmpegErr = e | ||
| } | ||
| } |
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this holds an already-known yt-dlp failure until ffmpeg's exit monitor finishes. with a delayed ffmpeg exit after PCM EOF, my process fixture reconnects on base but stops silently on this head; the normal-end Stop() sets closing, so the saved failure never reaches StreamErr().
| if text, ok := strings.CutPrefix(line, "ERROR:"); ok { | ||
| diagnostic = strings.Join(strings.Fields(text), " ") |
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with --color always in yt-dlp's config, its fatal lines start with an ANSI escape, so this prefix check drops the diagnostic. replaying a real colored HTTP 403 returns only yt-dlp: exit status 1 (see cliamp.log) and makes one playback attempt on this head, versus three on base.
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Two related improvements to selecting and diagnosing yt-dlp playback.
Select the yt-dlp executable
All yt-dlp call sites resolve the executable through
internal/ytdlbin, in order:CLIAMP_YTDLPytdlp_pathinconfig.tomlyt-dlpfromPATH(unchanged default)Place the config key at the top level, before the first
[section]header:This covers playback, duration probing, playlist expansion, downloads, and NetEase cookie extraction. Explicit unusable selections name the binary and selecting setting, without recommending an installation that the selected path would override. Missing and non-executable paths are described accurately. Related: #163.
Preserve playback diagnostics without hiding the failure
Playback keeps yt-dlp warnings enabled. The one-row TUI prioritizes the final fatal diagnostic; warnings and the captured stderr from failed attempts are available in
cliamp.login the configuration directory:$CLIAMP_CONFIG_DIRif set, otherwise$XDG_CONFIG_HOME/cliampif set, or normally~/.config/cliamp. Existing capture is limited to 64 KiB per process, with a truncation marker. Signal exits caused by stop/seek or other process termination are debug-level rather than normal playback-error entries.Startup retries classify only the fatal yt-dlp diagnostic. A warning mentioning HTTP 403 cannot turn a permanent
Video unavailablefailure into three attempts. Actual fatal 403s retain the existing three-attempt budget. A monitor goroutine publishes a late process failure into the error latch the UI polls, so a diagnostic reported around PCM EOF is not mistaken for a clean end of track; the audio callback never waits for a process to exit. Exits caused by cliamp's own teardown (stop, seek, an abandoned retry) are cleanup rather than playback failures, decided by an explicit teardown flag instead of an exit code, which a killed process reports differently on POSIX and Windows. A child killed from outside cliamp is still reported as a playback failure.ffmpeg's PCM now arrives through a pipe cliamp owns rather than
Cmd.StdoutPipe.Waitcloses aStdoutPipeat process exit, so the end of every track dropped the PCM still buffered in the kernel pipe and failed the next read withfile already closedinstead of EOF — a spurious stream error that triggered a reconnect and could mask the real yt-dlp diagnostic.There is no automatic version/runtime probe and no probe cache. The guide explains how to run diagnostics manually against the selected binary and covers outdated yt-dlp, JavaScript runtimes, EJS components, and PO tokens.
Verification
make checkmake fmt-check vet staticcheck securitygo test -count=1 -race ./...Docs and website updated together.